QR Code Glossary
A glossary of QR code terminology explained in plain language.
5G
Fifth-generation mobile communication, designed for higher speed, greater capacity, and lower latency, leaving more headroom for the rich content delivered after a QR code scan.
A/B Testing
An experimental method comparing two variations to identify the more effective one. Used to optimize QR code design, placement, and CTAs.
Access Analytics
A method of analyzing the number and behavior of visitors to a website. By adding UTM parameters to a QR code, you can accurately measure how much traffic came from which QR code.
Access Point
A network device serving as a Wi-Fi connection hub. QR codes sharing access point information enable password-free Wi-Fi connection.
Accessibility
Ensuring all people can use information and services regardless of disability, age, or environment. One of the considerations in QR code design and placement.
Alignment Pattern
Alignment patterns are small 5x5-module squares in QR codes (Version 2 and above) that correct distortion so codes scan reliably from an angle. Learn their role, where they sit, and how their count grows with version.
Alphanumeric Mode
One of the QR code encoding modes. Handles 45 characters (0-9, A-Z uppercase only, space, and symbols $%*+-./:), compressing two characters into 11 bits.
Analytics
A method of analyzing how a website or app is used, through data. Analyzing QR code scan data makes it possible to evaluate the effect of offline initiatives quantitatively.
Anti-Counterfeiting
Technologies and systems to prevent unauthorized reproduction of products and tickets. QR codes are used for identification, authentication, and encryption-based protection.
API
An interface for exchanging data and functionality between software systems. Used for bulk QR code generation and management system integration.
API Key
An authentication token identifying API users and controlling access. Used for request authentication and usage management when calling QR code generation APIs.
App
Application software for smartphones and tablets. QR code scanner, generator, and payment apps are central to QR code usage.
AR
Augmented Reality. Technology that overlays digital information on real-world camera views. QR codes serve as triggers to launch AR content.
AR Glasses
Eyewear-shaped devices that overlay digital information on real-world vision. Tiers differ in whether a display is built in; expected as a hands-free path for reading QR codes.
Aspect Ratio
The width-to-height ratio of an image or display area. QR codes must be square (1:1); distorted aspect ratios cause scan failures.
Attribution
Analysis of each touchpoint's contribution to conversion. QR codes are one of the few tools enabling attribution measurement for physical advertising media.
Barcode
A one-dimensional code that represents data using black and white stripes. The predecessor technology to QR codes.
Barcode Reader
A dedicated device for optically reading barcodes and QR codes. Faster and more accurate than smartphones, it remains the primary scanning tool for business use.
Barrier-Free
Initiatives that remove the barriers people with disabilities and older people face in daily life. QR codes call for a design that covers placement height, size, contrast, and even the accessibility of the link destination.
Batch Printing
The process of generating and printing large numbers of QR codes in bulk. It is an essential technique for efficiently mass-producing QR codes that differ for each serial number or lot number.
Beacon
A small device that broadcasts location signals via Bluetooth Low Energy. Combined with QR codes, beacons enhance indoor navigation and push notification accuracy.
Binarization
Converting each pixel to black or white. A core step in QR code decoding that determines whether each module is dark or light.
Binary Mode
One of the QR code encoding modes. Stores arbitrary byte sequences, supporting UTF-8 text, binary data, and any character set.
Biometrics
Technology verifying identity through physical characteristics like fingerprints and faces. Combining QR codes with biometrics strengthens ticket and access control security.
BLE
Bluetooth Low Energy - a low-power short-range wireless standard. The foundation of beacon technology, used with QR codes for indoor location services.
Blockchain
A distributed ledger technology that chains transaction data in blocks, making tampering extremely difficult. Used with QR codes for product traceability.
Bounce Rate
The proportion of visitors to a website who leave after viewing only one page. The bounce rate of a QR code landing page is an important metric for measuring the quality of the experience after the scan.
Branding
Activities that build a brand's awareness / image / value. Integrating the design, colors, and logo of a QR code is an important element in maintaining brand consistency at physical touchpoints as well.
Browser
Software for viewing web pages. After scanning a QR code, the browser opens the URL, serving as the starting point of the user experience.
Byte
A fundamental unit of digital data consisting of 8 bits. In QR codes, bytes are used to express data capacity limits and as the encoding unit in Binary Mode.
Cashless Payment
Payment methods that do not use physical cash. QR code payment is a major cashless method, with adoption expanding through the 2020s.
Cashless Payment
Payment methods that do not use physical currency. QR code payment is a major driver of cashless adoption, especially in Asia where it has spread rapidly.
Chatbot
A program that responds automatically by text or voice. By scanning a QR code to launch a chatbot, you can automate handling inquiries and taking orders.
Checksum
A short value computed from data to verify its integrity. In QR codes, BCH codes in format information and Reed-Solomon codes in data serve as checksums.
Click & Collect
A way of shopping in which you order online and pick up at a store. QR codes are used as the means of confirming the order and authenticating the pickup at the store.
Cloud
A service model providing computing resources over the internet. QR code management platforms that run on cloud infrastructure eliminate the need for users to maintain their own servers.
CMYK
Color model using Cyan, Magenta, Yellow, Black inks. The color space for printing QR codes.
Codeword
An 8-bit block that serves as the fundamental data unit inside a QR code. Input data is converted into data codewords, then error correction codewords are appended before placement.
Color Depth
The number of bits used to represent the color information of one pixel. A QR code is essentially a 1-bit (black and white) image, but design QR codes make use of full-color color depth.
Compliance
Complying with laws and regulations. In QR code operations, conformity with the legal regulations that apply to each use, such as the Act on the Protection of Personal Information, the GDPR, the Act against Unjustifiable Premiums and Misleading Representations, and the Pharmaceuticals and Medical Devices Act, is required.
Consent
A user's explicit permission for the collection / use of personal data. Collecting QR code scan logs and setting cookies require appropriate consent based on legal regulations.
Contactless
Exchanging information or performing operations without physical contact. Because QR codes work through visual reading, they are inherently a contactless technology and excel in terms of hygiene.
Contactless Menu
A system in which you scan a QR code to view the menu on your smartphone. It spread rapidly among restaurants during the COVID-19 pandemic and contributes not only to hygiene but also to instant menu updates and cost reduction.
Contrast
The degree of difference in brightness or color between elements. Module-to-background contrast is one of the most critical factors for QR code scan reliability.
Contrast Ratio
The ratio of brightness difference between QR code modules (dark) and background (light). Directly affects scanning accuracy.
Conversion
In web marketing, when a visitor completes a desired action (such as purchase, signup, or inquiry). QR codes function as offline-to-online conversion pathways.
Cookie
Small data stored in web browsers. Used for tracking QR code visitors and session management, but evolving privacy regulations are changing cookie practices.
CSV
A comma-separated text format. A general-purpose format widely used for bulk QR code generation and for exporting scan data.
CTA
Call to Action - a button or text prompting users to take a specific action. Placing an effective CTA near a QR code dramatically affects scan rates.
Customer Journey
The complete experience from product awareness through purchase and advocacy. QR codes connect physical and digital at each journey stage.
CVR
Conversion Rate - the percentage of visitors who complete a target action. In QR code marketing, measured as purchases/signups relative to scan count.
Dark Mode
A display mode with a dark background and light text. When displaying a QR code on a page that supports dark mode, attention must be paid to the code's visibility and scanning accuracy.
Dashboard
A management screen that visually aggregates and displays data. On the dashboard of a QR code management platform, you can view analytics data such as scan count / region / device in a single list.
Data Capacity
The maximum amount of data a QR code can store, determined by the combination of version and error correction level.
Data Encoding
The process of converting human-readable text and numbers into bit sequences that computers can process. In QR codes, it refers to the entire pipeline from input data to module pattern.
Data Matrix
A two-dimensional code standard separate from QR codes. Characterized by its square border, widely used in pharmaceutical and electronics management.
Data Redundancy
A mechanism that adds extra information so that data can be restored even if part of it is lost. QR code error correction achieves resistance to damage by building in redundancy that can restore the loss of up to about 30% of the codewords.
Data URI
A scheme embedding image/file data directly in URI strings. Generating QR code images as data URIs enables direct HTML embedding without external files.
Database
A system for efficiently storing, searching, and managing structured data. Essential for dynamic QR code management and traceability information storage.
Deep Link
A link that navigates directly to a specific screen within an app. Stored in QR codes, it opens specific app pages on scan.
Deferred Deep Link
A mechanism that routes users through app store installation then automatically navigates to the original link destination. Essential for QR code-to-app-screen navigation.
Denso Wave
The Japanese company that developed QR codes. A Denso group company manufacturing auto-ID equipment and robots.
Design QR Code
A visually customized QR code with colors and logos. Error correction level H is recommended.
Digital Coupon
An electronic coupon displayed and used on a smartphone. QR codes play a central role in the entire process of coupon distribution / presentation / redemption.
Digital Divide
The gap between those who can and cannot access information technology. QR-only menus and payments can put those without smartphones at a disadvantage.
Digital Legacy
Digital data and online accounts left by the deceased. QR code tombstones and memorial pages offer new ways to preserve and share memories digitally.
Digital Menu
An electronic menu viewed on a smartphone. Digital menus displayed by scanning a QR code on the table are driving the shift to paperless operations and greater operational efficiency in the restaurant industry.
Digital Signage
An information display system using electronic screens. Displaying QR codes on screens enables interactive advertising that directs viewers to online content.
Digital Signature
A cryptographic mechanism that proves data authorship and integrity. Embedding digital signatures in QR codes enables verification of code authenticity.
Digital Twin
A virtual model faithfully reproducing a physical object in digital space. QR codes function as interfaces linking physical objects to their digital twins.
Digital Wallet
An application that manages payment credentials, IDs, and tickets on a smartphone. QR codes serve as entry points for adding passes and initiating payments.
Direct Mail
Advertising materials mailed to individuals. Printing QR codes on direct mail creates paper-to-digital pathways and enables response measurement.
Domain Name
A human-readable string identifying a server on the internet. Serves as an indicator for judging the trustworthiness of URLs in QR codes.
Download
Transferring data from a server to a local device. In QR code generators, downloading is the final step to obtain the created code in formats such as PNG or SVG.
DPI
Dots Per Inch - a unit measuring print resolution by dots per inch. A critical metric directly affecting QR code print quality and scan reliability.
Durability
The ability of a QR code to withstand physical deterioration and remain readable. Durability is determined by the combination of material selection, printing method, and error correction level.
Dynamic QR Code
A QR code whose link destination can be changed later. Because it goes through a short URL, the destination can be swapped even after printing.
E-Commerce Site
A website selling products or services online. QR codes bridge physical stores to e-commerce and enable direct product page links.
EAN
European Article Number - an international barcode standard for product identification. As QR code transition progresses, EAN remains the foundation of product identification built over half a century.
Ecosystem
A system where multiple companies, services, and technologies interconnect to create value. QR codes function as a common interface across payment, authentication, logistics, and marketing ecosystems.
eL-QR
Japan's unified local tax QR code. Scan the QR code on tax payment slips to pay taxes from a smartphone.
Electronic Health Record
A system that electronically records and manages patients' medical information. QR codes are used for information sharing in medical settings, such as patient identification, prescription management, and referencing test results.
Electronic Money
A payment method that records and transfers value electronically. QR code payment is one form of electronic money, and payment is completed with just a smartphone.
Embed
Incorporating QR code images or widgets into web pages and applications. QR codes can be dynamically displayed using HTML img tags or iframes.
Encode and Decode
Encoding converts data from one format to another; decoding reverses the process. QR code generation and scanning are fundamentally encode-decode operations.
Encoding Mode
The method QR codes use to encode data. Four types exist: numeric, alphanumeric, binary, and kanji, auto-selected based on data type.
Encryption
The process of converting data into an unreadable format. Standard QR codes have no encryption - understanding this is critical for security.
End-to-End Encryption
Encryption where only sender and receiver can read the data. Even the service provider cannot access the content. Used by LINE and WhatsApp.
Engagement
The degree of customer involvement and attachment to a brand. QR code scanning is an active behavior that serves as a high-engagement indicator.
Error Correction
A mechanism that can restore the original data even if part of a QR code is dirty or damaged. There are 4 levels: L/M/Q/H.
Expiration
The period during which a QR code or its destination functions. Static QR codes don't expire, but dynamic QR codes and coupon codes require expiration management.
Fallback
An alternative means that is switched to automatically when the primary means fails. It refers to an alternative way of access when a QR code cannot be read, or an alternative page when a redirect fails.
Finder Pattern
The large squares at three corners of a QR code. Landmarks that help scanners detect the code's position and orientation.
Firmware
Control software embedded in hardware. Firmware updates for QR code readers and POS terminals are essential for maintaining scan performance and security.
Form Factor
The physical shape / size / form of a product. QR codes are deployed in diverse form factors, such as stickers, engravings, and on-screen displays.
Format Information
A 15-bit data area embedded in QR codes indicating the error correction level and mask pattern number.
Frame QR Code
A QR code variant with a canvas area in the center. Illustrations and text can be freely placed inside.
Freemium
A business model offering basic features free and charging for advanced features. Most QR code generators use this model.
Funnel
A model that represents, in the shape of a funnel, the step-by-step process customers go through from awareness to purchase. QR codes play different roles at each stage of the funnel and guide customers to the next stage.
Galois Field
An algebraic structure with a finite number of elements. QR code Reed-Solomon error correction operates over GF(2^8), making it the mathematical foundation of QR code resilience.
Gamification
Applying game elements to non-game contexts. QR code stamp rallies, treasure hunts, and point collection are representative gamification applications.
GDPR
The EU's General Data Protection Regulation. It imposes strict requirements on personal data collection and processing through QR codes, influencing global privacy standards.
Geofencing
A technology that sets virtual geographic boundaries and detects when devices enter or leave them. Combined with the location where a QR code is scanned, it makes region-limited content delivery and promotions possible.
Geolocation
Technology that determines a device's geographic position. Recording QR code scan locations enables regional usage analysis and location-based services.
Google Analytics
A free web analytics tool by Google. Combined with UTM parameters, it accurately measures QR code traffic and conversions.
GPS
A satellite-based positioning system. Combined with QR codes for location-verified check-ins and map integration.
Grayscale
An image format using only brightness levels from white to black. QR code scanners convert images to grayscale before binarization to identify modules.
GS1 QR Code
A QR code conforming to the GS1 international distribution standard. Stores product identification, lot numbers, and expiration dates in a standardized format.
GTIN
Global Trade Item Number - a worldwide product identification system. GS1 QR codes encode GTINs as URLs, unifying product identification with digital information.
Hash
A one-way function that converts data of any length into a fixed-length value. A foundational technology used in QR code payments and digital certificate tamper detection.
Heatmap
A method of visualizing the density or intensity of data through shades of color. It allows visual analysis of where QR codes are scanned and of user behavior on landing pages.
Hologram
Technology using light interference to record and reproduce 3D images. Multi-layered anti-counterfeiting combining QR codes and holograms is used for high-value goods and official documents.
HTTPS
A protocol that encrypts web communication. URLs stored in a QR code are recommended to start with https://. Whether a site supports it can be checked in the browser's address bar.
Image Recognition
Technology identifying patterns and objects from camera images. QR code scanning is a specialized form of image recognition: grayscale conversion and binarization come first, then finder pattern detection.
Inbound Tourism
A term referring to foreign travelers visiting Japan. QR codes with multi-language support have become the cornerstone of inbound tourism measures, providing tourist information and payments across the language barrier.
Influencer
Individuals with significant social media followings who affect purchasing decisions. QR codes serve as trackable links from influencer content to product pages.
Information Theory
An academic field that deals mathematically with the quantity / transmission / encoding of information. It is the theoretical foundation for data compression and error correction in QR codes, and Shannon's channel coding theorem is its starting point.
Interoperability
The ability to share data and functions between different systems and devices. The QR code is an open standard based on an ISO standard and has high interoperability.
Inventory Management
The process of tracking product quantities, conditions, and locations. QR codes are used in logistics and retail for item-level tracking.
Inverse QR Code
A QR code drawn with light modules on a dark background instead of the usual black on white. It blends in with dark mode designs, but some scanners may not be able to read it.
Invisible Ink
A special ink that cannot be seen with the naked eye and can be read with ultraviolet or infrared light. It is used for anti-counterfeiting of QR codes and for printing hidden QR codes that do not spoil the design.
IoT
Internet of Things - connecting physical devices to networks. QR codes serve as a bridge between IoT devices and their digital information.
ISBN
International Standard Book Number - a 13-digit code uniquely identifying books worldwide. QR codes with ISBNs enable instant access to book information.
ISO/IEC 18004
The international standard for QR codes. Defines symbol specifications, data encoding methods, and error correction.
JIS
Japanese Industrial Standards. QR code Kanji mode is built on the JIS X 0208 character set, enabling efficient encoding of Japanese text.
Kanji Mode
One of the QR code encoding modes. Stores Shift JIS kanji and kana at 13 bits per character, roughly 46% more efficient than Binary Mode for Japanese text.
KPI
Key Performance Indicator - metrics measuring goal achievement. QR code marketing KPIs include scan count, conversion rate, and ROI.
Label
A sticker / tag attached to products or packages to display information. A label with a QR code provides an access point to a large amount of information in a limited space.
Landing Page
The first page visitors reach from an ad or link. Conversion-optimized landing pages can be designed as QR code destinations.
Last Mile
The final leg from a distribution center to the final delivery destination. It accounts for about 50% of total logistics costs, and it is an area where efficiency gains through QR codes are advancing.
LINE Friend Add QR Code
A QR code for adding LINE official or personal accounts as friends. Learn where to find your own LINE QR code, how to scan a friend's code, and how to share it to add friends in one tap.
Logistics
The process of moving goods from production to consumer, including transportation, storage, and handling. QR codes are used for package tracking and sorting automation.
Logo QR Code
A QR code with a logo or image embedded in the center. It is made possible by making use of the error correction function.
Lot Number
An identifier for a group of products manufactured under identical conditions. Encoding lot numbers in QR codes accelerates production history tracking and recall response.
Loyalty Program
Point systems and member benefits that encourage repeat business. QR codes serve as tools for point accrual, membership cards, and benefit distribution.
M-Pesa
Kenya's mobile money service enabling transfers without bank accounts. Handles ~50% of Kenya's GDP. Now supports QR code payments.
Malware
Malicious software designed to harm devices. QR code-based attacks directing users to malware distribution sites are increasing, requiring caution before scanning.
Map QR Code
A QR code that opens a specific location in Google Maps or other map apps. Used for directions.
Marketing
Strategic activities to deliver products and services to customers. QR codes serve as a key offline-to-online bridge in marketing campaigns.
Masahiro Hara
A principal developer of the QR code. As an engineer in a division of Denso (now Denso Wave), he led the development of the QR code, which was announced in 1994.
Mask Pattern
A black-white inversion pattern applied to the data area to improve scanning accuracy. Eight patterns exist.
Micro QR Code
A compact version of the standard QR code with only one finder pattern, saving space.
Minimum Size
The smallest physical size at which a QR code can be reliably scanned. Proper size design based on use case and scanning distance determines scan success rate.
Mobile-First
An approach that designs with use on smartphones as the top priority. QR code scans are made almost 100% on smartphones, so link destinations should be designed mobile-first.
Module
The black or white square that is the smallest unit making up a QR code. It is also called a cell.
Multi-Language
Providing content in multiple languages. A QR code can automatically route the person scanning it to a page in the appropriate language based on their language settings and location information.
NFC
Near-field wireless communication technology. An alternative to QR codes that reads information by tapping a smartphone.
NFC Tag
A small tag with an embedded near-field communication chip. Like QR codes, it transfers data by tapping a smartphone, but differs in cost and use cases.
No-Code
An approach to building applications without programming. Most QR code generation tools are no-code, enabling QR code use without technical knowledge.
Nudge
A method, based on behavioral economics, of guiding people's behavior in a desirable direction without forcing them. By applying the principles of nudges to the placement and design of QR codes, the scan rate can be improved.
Numeric Mode
One of the QR code encoding modes. Handles only digits 0-9, compressing three digits into 10 bits for maximum data efficiency.
OCR
Technology that recognizes and extracts text from images. QR codes complement OCR limitations by providing accurate data transmission where precision is critical.
Offline-First
A design philosophy where applications function without network connectivity. QR codes have an inherent advantage as offline data transmission tools.
Omnichannel
A strategy integrating all online and offline customer touchpoints for seamless purchasing experiences. QR codes are the key technology bridging physical and digital spaces in omnichannel.
Onboarding
The introduction process when new users begin using a product or service. QR codes simplify guiding users to app installation, initial setup, and tutorials.
One-Time Password
A disposable password valid for a single use. QR codes are the standard method for transferring TOTP secret keys to authenticator apps during initial setup.
Open Source
A software development model in which source code is made public so that anyone can freely use / modify / redistribute the software. The QR code specification is published as an ISO standard, and many generation libraries are provided as open source.
Paperless
Initiatives to reduce or eliminate paper usage. QR codes drive paperless transformation by replacing paper tickets, menus, and manuals with digital alternatives.
Parity Check
A fundamental error detection method. QR codes use parity-based techniques to verify format and version information.
Password
A secret string used for authentication. Often stored in Wi-Fi QR codes, but QR codes themselves have no encryption, requiring careful handling.
Patent
An exclusive right granted by a government for an invention. Denso Wave holds QR code patents but does not enforce them, enabling free worldwide use.
Payload
In communication and data structures, the actual body of the data, excluding headers and metadata. The payload of a QR code refers to the user data portion, excluding the error correction codewords.
An electronic document format developed by Adobe. Widely used for distributing invoices, tickets, and manuals with embedded QR codes.
Persona
A fictional profile representing a target user. QR code placement, design, and CTAs should be designed based on personas.
Personal Data
Information that can identify a specific individual. Proper protection is required when QR codes store personal data or when scan logs can track individuals.
Personalization
Customizing content and experiences based on the attributes and behavior of individual users. Dynamic QR codes enable personalization that displays different content for each person who scans.
Perspective Correction
Processing that corrects the distortion of an image taken at an angle and converts it into the state seen from the front. It is thanks to perspective correction that a QR code can be read even when it is scanned at an angle.
Phishing
A social engineering attack using fake sites or messages to steal personal information. QR code phishing is called quishing.
Pixel
The smallest unit of a digital image. In QR codes, the number of pixels per module determines scan reliability and print clarity.
Platform
A foundational environment where services and applications operate. QR code generation platforms provide unified code creation, management, and analytics.
POS
Point of Sale system. Scans product barcodes and QR codes to manage sales and inventory in real time - the backbone of retail operations.
Print Bleed
An extra print area set outside the finished size of a printed piece. When placing a QR code near the edge of a printed piece, care is needed so that the QR code does not extend into the bleed area.
Printing
The process of outputting QR codes onto physical media. Resolution, size, and material choices directly affect scan reliability.
Product Recall
A system for recovering and repairing defective products. By storing lot numbers and serial numbers in QR codes, identifying the products subject to a recall and notifying consumers can be sped up.
Protocol
Rules governing communication and data exchange. QR codes require correctly specified protocols (HTTP, HTTPS, mailto, tel) to function properly after scanning.
Public Key Cryptography
A cryptographic method that uses different keys for encryption and decryption. It is the foundation of HTTPS communication and a technology that supports the safety of QR code link destinations.
PWA
Progressive Web App - web technology delivering native app-like experiences. As QR code destinations, PWAs provide instant app experiences without installation.
QR Business Card
A QR code printed on a business card. Scan to save contact information directly to a smartphone.
QR Code
A two-dimensional barcode developed by Denso Wave in 1994. It is short for Quick Response Code.
QR Code Access Control
A system managing building or room entry/exit by scanning QR codes. Used in offices, event venues, and coworking spaces.
QR Code Agriculture
QR codes in agriculture enable produce origin certification, cultivation history disclosure, and farm-to-table traceability.
QR Code AR
A system where scanning a QR code displays AR (augmented reality) content. Used on product packaging and advertisements.
QR Code Art
Decorative QR codes incorporating illustrations and designs while maintaining scanning functionality.
QR Code Attendance
A system that records attendance by scanning QR codes at the reception of events and seminars.
QR Code Authentication
An authentication method using QR code scanning for identity verification or login. Used by LINE, WhatsApp Web, and other services.
QR Code Boarding Pass
A smartphone-based boarding pass issued by airlines. Scan at the airport to complete boarding procedures.
QR Code Campaign
A general term for marketing initiatives where scanning a QR code enables entry, coupon redemption, or reward collection.
QR Code Coupon
A digital coupon distributed and redeemed via QR code. Simply scan at the store to apply the discount.
QR Code Digital Signage
QR code digital signage is a system that lets people access campaign information and advertising on the spot through a QR code displayed on a digital sign. This entry explains the benefits of introducing it and examples of how it is used.
QR Code Donation
A system for making donations by scanning a QR code. Enables cashless, convenient giving.
QR Code Generator
A tool that creates QR code images from URLs or text. Many free online services are available.
QR Code Generator
Software or a service that creates QR code images from URLs or text. There is a wide range of options, from free online tools to feature-rich platforms for businesses.
QR Code Health Pass
A system for presenting vaccination or negative test certificates via QR code. Became widespread globally during COVID-19.
QR Code History
The evolution of QR codes from their 1994 invention by Denso Wave to the present. From automotive parts management tool to global digital infrastructure.
QR Code Inventory Tag
A QR code label attached to products or materials. Scan to view and update inventory details like item name, quantity, and storage location.
QR Code Invoice
A QR code printed on invoices or payment slips. Scan to proceed directly to payment.
QR Code Label
A label with a QR code attached to products or packages. Used for product information and shipment tracking.
QR Code Learning Material
Learning materials with QR codes printed on textbooks or worksheets, providing access to supplementary videos, audio, and interactive content.
QR Code Logistics
A system scanning QR codes at each logistics stage to streamline package tracking, sorting, and delivery management.
QR Code Menu
A system where scanning a QR code at a restaurant table displays the menu on your smartphone.
QR Code Mobile Order
A restaurant system where scanning a table QR code enables ordering and payment entirely from a smartphone.
QR Code Name Tag
A name badge with a printed QR code for exhibitions and conferences, enabling contact exchange and profile viewing by scanning.
QR Code New Year's Card
A New Year's card with a printed QR code linking to video messages or photo galleries.
QR Code Offering
A system for making cashless offerings at shrines and temples by scanning a QR code.
QR Code Parking
A cashless parking system where QR codes are scanned for entry, exit, and payment.
QR Code Payment
A cashless payment method using QR codes. Includes merchant-presented and consumer-presented types.
QR Code Payment App
A general term for smartphone apps that use QR codes to pay at stores and to send money between individuals.
QR Code Payment Terminal
A dedicated device installed at store registers that reads QR codes displayed on customers' smartphones to process payments.
QR Code Pet Tag
A lost pet tag with a QR code attached to a pet's collar. Scanning displays the owner's contact information and pet details.
QR Code Point Card
A digital loyalty card that uses QR codes instead of plastic cards to earn and redeem points.
QR Code Prescription
A QR code printed on a prescription. It speeds up dispensing at the pharmacy and prevents input errors.
QR Code Reader Device
Dedicated hardware for scanning QR codes. Used at places such as registers, factories, and logistics facilities.
QR Code Review
A QR code that directs customers to review pages on Google Maps, restaurant guides, and other platforms.
QR Code Scanner
A QR code scanner is a general term for devices and apps that read QR codes. This entry explains the difference between cases where a smartphone's standard camera can read the code and cases where a dedicated app is needed, how to choose between these and business scanners, and the points to consider when choosing one.
QR Code Stamp Rally
A digital stamp rally where participants scan QR codes at various locations to collect stamps.
QR Code Sticker
A sticker or label printed with a QR code. Attach to items to link them to digital information.
QR Code Tombstone
A QR code embedded in a gravestone that links to photos and biographical information of the deceased.
QR Code Traceability
A system using QR codes to track product distribution from production to consumption. Used in some cases for food origin verification.
QR Code Tracking
A system for collecting and analyzing QR code scan data including count, time, and region. Used for measuring marketing effectiveness.
QR Phishing
A phishing scam using QR codes (also called quishing) that redirects victims to fake websites to steal personal information.
QR Ticket
An electronic ticket using a QR code for admission or boarding. Eliminates the need for paper tickets.
Quiet Zone
The required white margin around a QR code. Without it, scanners cannot recognize the code's boundaries.
Ransomware
Malware that encrypts data and demands ransom for decryption. QR code-mediated ransomware infections have been reported, requiring caution with suspicious QR codes.
Raster Image
A digital image format composed of a pixel grid. PNG and JPEG are common examples, widely used for QR code export but subject to quality loss when scaled up.
Rate Limiting
A mechanism that limits the number of requests to an API or service within a set period. When using a QR code generation API, you need to understand the rate limits that apply to your plan.
Redirect
A mechanism that automatically forwards users from one URL to another. The foundational technology behind dynamic QR codes and URL shorteners.
Reed-Solomon Code
A mathematical algorithm used for QR code error correction. Restores damaged data using redundancy.
Remainder Bits
Remainder bits are zero-value filler bits placed after all codewords have been arranged in a QR code symbol. Their count is fixed per version: 0, 3, 4, or 7 bits.
Resolution
A measure of image detail. For QR codes, print dpi and display pixel count determine scan reliability and visual clarity.
Responsive Design
A web design method in which the layout adjusts automatically to the screen size. Because the majority of visits to pages linked from QR codes come from smartphones, responsive support is essential.
Retargeting
A method of showing ads again to users who visited a site in the past. Including users who visited a site through a QR code among the retargeting targets makes it possible to approach them again from an offline touchpoint.
RFID
Technology that reads tag data wirelessly using radio waves. RFID and QR codes take different approaches to automatic identification and are chosen based on use case.
RGB
A method of representing color with red / green / blue, the three primary colors of light. It is the color space used when displaying QR codes on smartphone screens and monitors.
rMQR Code
A rectangular QR code. A derivative standard developed by Denso Wave that can be printed in wide or tall spaces.
ROI
Short for Return on Investment. An indicator that shows the ratio of profit to investment. In QR code marketing, ROI is evaluated by scan counts and conversions relative to printing costs.
Sandbox
An isolated environment where tests and experiments can be run without affecting the production environment. Sandbox environments are used to verify how QR code payments and dynamic QR codes work.
Scan
The operation of reading a QR code with a camera or sensor and decoding the stored data. The most basic action in using QR codes.
Scan Flow
The complete experience from discovering a QR code through scanning to achieving the goal. Scan flow design determines user experience and conversion rate.
Segment
A group of customers who share common attributes or behavior patterns. Segments can be built from QR code scan data, and content optimized for each group can be delivered.
Self-Checkout
A checkout system in which customers scan and pay for products themselves. QR code payment and reading the QR codes of point cards are among the main functions of self-checkout.
SEO
Short for Search Engine Optimization. Measures to improve display rankings in search engines. QR codes have no direct SEO effect, but they contribute indirectly to improving a site's evaluation.
Serial Number
A unique identifier for individual products. Encoding serial numbers in QR codes enables per-unit authentication and individual product tracking.
Server
A computer that provides services and data over a network. Essential infrastructure for dynamic QR code redirect management and scan analytics storage.
Session
A series of user interactions from website access to departure. QR code scans initiate new sessions, serving as the basic unit of access analytics.
Short URL
A service converting long URLs to short strings. Shortening URLs stored in QR codes reduces code version and physical size.
Signage
A visual medium for conveying information, such as billboards and signs. By incorporating a QR code into signage, you can add a digital layer of information to static displays.
Smart City
Initiatives using ICT to optimize urban functions. QR codes are widely deployed as citizen-facing interfaces for transportation, government services, tourism, and disaster preparedness.
Smartphone Camera
The most common means of reading QR codes. Instead of dedicated scanners, QR codes can now be decoded directly with the camera app built into the OS.
Smartphone Payment
Paying via smartphone using QR codes or NFC. QR code-based smartphone payments spread widely due to near-zero setup costs for merchants.
SMS
A service for sending and receiving short text messages addressed to a mobile phone number. By storing an SMS recipient in a QR code, a single scan can open the message composition screen.
SNS
Social Networking Service. QR codes serve as a tool for SNS marketing, enabling profile sharing, follower growth, and campaign engagement.
SNS QR Code
A QR code that directs to social media profiles on Instagram, X (formerly Twitter), and other platforms.
Social Engineering
An attack method that exploits human psychological weaknesses to steal information. QR codes can become a tool of social engineering that abuses the sense of trust that "scanning it is convenient."
SQRC
A security-enhanced QR code developed by Denso Wave. Stores both public and private data in a single code.
SSID
The identifying name of a Wi-Fi network. When Wi-Fi connection information is shared with a QR code, the SSID is stored together with the password and the encryption method.
SSL Certificate
A digital certificate that proves the identity of a website and encrypts communication. Having the link destination of a QR code be an HTTPS site with an SSL certificate is a basic requirement for protecting users' safety.
Static QR Code
A QR code in which the data is stored directly in the QR code itself. It does not depend on external services.
Stocktaking
The task of checking the actual quantity of inventory. Stocktaking with QR codes captures more information in a single scan than barcodes, greatly improving work efficiency.
Store Scan Method
A QR code payment method where the customer displays a QR code on their phone and the store's terminal reads it.
Structured Append
A feature that splits one dataset across multiple QR codes. Up to 16 QR codes can be linked together.
Structured Data
Metadata written in a format that search engines can easily understand. Implementing structured data on a QR code landing page enhances how it appears in search results.
Subscription
A recurring payment model for continuous service access. QR codes simplify signup flows and distribute subscriber-exclusive benefits.
Supply Chain
The entire flow from raw materials through manufacturing, logistics, and retail to the end consumer. QR codes enable visibility and traceability across the supply chain.
Sustainability
Environmental, social, and economic sustainability. QR codes contribute through paper reduction, supply chain transparency, and carbon footprint visualization.
SVG
A vector image format. QR codes in SVG can be enlarged without quality loss.
Symbol
A technical term for the entire printed pattern of a machine-readable code such as a QR code or barcode.
Targeting
A method of delivering ads and content only to user groups with specific attributes or behavior patterns. QR codes make targeting based on scan location / time / device possible.
Template
A standard design or structure that can be used repeatedly. By using QR code design templates, you can mass-produce codes efficiently while keeping the brand consistent.
Terminator Pattern
The terminator is a sequence of up to four zero bits appended to the end of a QR code's data bit stream, telling the decoder where the data ends. Defined in ISO/IEC 18004.
Timing Pattern
Alternating black and white lines connecting finder patterns in a QR code. Serve as reference lines for accurately locating module coordinates.
TLS
A protocol that encrypts communication. It is the underlying technology of HTTPS and supports the safety of the websites accessed from QR codes.
Tokenization
Security technology replacing sensitive data with meaningless tokens. QR code payments use tokens instead of card numbers to reduce data breach risk.
Touchpoint
Every opportunity where customers interact with a brand. QR codes add digital information layers to physical touchpoints, extending customer experiences.
Traceability
The ability to track a product's history from raw materials through manufacturing, distribution, and sale. QR codes are widely used for identification and information access.
Trademark
A sign identifying goods or services. QR Code is a registered trademark of Denso Wave, requiring care in commercial naming.
Two-Dimensional Code
A general term for codes that store data in two directions. QR codes are one type of two-dimensional code.
Two-Factor Authentication
A security method requiring a second verification factor beyond passwords. QR codes are widely used for TOTP app setup and as authentication flow entry points.
Universal Design
A design philosophy of making things easy for everyone to use, regardless of age or disability. It also applies to the placement and sizing of QR codes.
UPI
India's government-led Unified Payments Interface. Processes 10+ billion monthly QR code transactions, enabling financial inclusion for a billion people.
URI
Uniform Resource Identifier - a string that uniquely identifies a resource. Most QR code data uses URI format, determining post-scan device behavior.
URL
A string that identifies the location of a resource on the Web. The most common data type stored in QR codes, where character count directly affects code size.
URL QR Code
A QR code that stores a website URL. Simply scanning it opens the page.
URL Shortener
A service that converts long URLs to short ones. Reduces QR code data volume, keeping codes compact.
Usability
The ease of use of a product or service. Every element, including QR code placement, size, CTA, and the design of the page after scanning, affects usability.
User Scan Method
A QR code payment method where the store displays a QR code and the customer scans it with their smartphone to pay.
UTM Parameter
Query parameters appended to URLs for tracking. Used to accurately measure QR code traffic in Google Analytics.
vCard
A standard format for electronic business cards. When stored in a QR code, it lets compatible smartphones and apps save the contact.
Vector Graphics
An image format that represents shapes using mathematical formulas for points, lines, and curves. Ideal for QR code printing because images scale without quality loss.
Version
A number indicating QR code size, ranging from 1 (21×21) to 40 (177×177) in 40 levels.
Viral
The phenomenon of content spreading explosively through sharing. QR codes can serve as viral ignition points bridging physical to digital spaces.
Visitor Management
A system that manages the reception / records / departure of visitors to offices and facilities. QR codes are used for entry passes issued in advance and for automating reception.
Watermark
Technology that embeds imperceptible information in images or data. Combining watermarks with QR codes enables counterfeit detection and copyright protection.
Wearable Device
Electronic devices worn on the body. Smartwatch QR code display and smart glasses scanning are expanding QR code usage scenarios.
White Label
An arrangement in which another company's product or service is offered under your own brand. By using the white-label version of a QR code generation service, you can offer a QR code management tool under your own brand.
Whitespace
Empty space in design. Securing enough whitespace around a QR code is a basic requirement for maintaining reading accuracy.
Wi-Fi
An international wireless LAN standard. QR codes can store Wi-Fi credentials, enabling one-tap connection without manual password entry.
Wi-Fi QR Code
A QR code containing Wi-Fi connection details. Scan to connect to the network without typing a password.
WPA
Wi-Fi security standard that encrypts wireless communication. QR codes for Wi-Fi connection specify WPA2 or WPA3 encryption.