# Peasy QR > QR & barcode tools made easy. Peasy QR provides free browser-based tools at https://peasyqr.com/. All processing happens client-side — files never leave your device. ## Tools (15) - [QR Data Analyzer](https://peasyqr.com/qr/qr-data-analyzer/) — - [QR Capacity Reference](https://peasyqr.com/qr/qr-capacity-reference/) — - [Wi-Fi QR Config Builder](https://peasyqr.com/qr/qr-wifi-generator/) — - [vCard QR Builder](https://peasyqr.com/qr/qr-vcard-generator/) — - [Error Correction Calculator](https://peasyqr.com/qr/qr-error-correction/) — - [Barcode Format Reference](https://peasyqr.com/qr/barcode-reference/) — - [Barcode Validator](https://peasyqr.com/qr/barcode-validator/) — - [QR Data Formatter](https://peasyqr.com/qr/qr-data-formatter/) — - [Event QR Generator](https://peasyqr.com/qr/qr-event-generator/) — Generate calendar event data for QR codes in iCalendar format - [Email QR Generator](https://peasyqr.com/qr/qr-email-generator/) — Generate email QR data with mailto: URI and MATMSG format - [SMS QR Generator](https://peasyqr.com/qr/qr-sms-generator/) — Generate SMS QR data with pre-filled messages - [Geo Location QR Generator](https://peasyqr.com/qr/qr-geo-location/) — Generate geographic coordinates for QR codes - [Phone Call QR Generator](https://peasyqr.com/qr/qr-phone-call/) — Generate tel: URI QR data for phone calls - [MeCard Generator](https://peasyqr.com/qr/mecard-generator/) — - [App Store Link Generator](https://peasyqr.com/qr/app-store-link-generator/) — ## Guides (44) - [QR Code Generation: Best Practices for Print and Digital](https://peasyqr.com/guides/qr-code-generation-best-practices/) — QR codes bridge physical and digital experiences, but poorly generated codes fail to scan. This guide covers sizing, error correction, … - [QR Code Design Best Practices: Balancing Aesthetics and Scannability](https://peasyqr.com/guides/qr-code-design-best-practices/) — A QR code that looks great but fails to scan is worse than useless. Understanding the relationship between visual customization … - [QR Codes for Restaurant Menus: Implementation Guide](https://peasyqr.com/guides/qr-codes-restaurant-menus/) — Contactless menus via QR codes became standard during the pandemic and remain popular for cost savings and easy updates. Implementing … - [QR Code Content Generation Patterns and Best Practices](https://peasyqr.com/guides/qr-code-content-generation-patterns/) — QR codes can encode URLs, contact cards, Wi-Fi credentials, and more. Each content type follows a specific format that scanning … - [QR Code vs Barcode: When to Use Each](https://peasyqr.com/guides/qr-code-vs-barcode/) — QR codes and traditional barcodes serve different purposes. This comparison covers data capacity, scanning requirements, and optimal use cases to … - [How to Create QR Codes for Wi-Fi Networks](https://peasyqr.com/guides/create-wifi-qr-codes/) — Wi-Fi QR codes let guests connect to your network instantly by scanning with their phone camera. This guide covers the … - [How to Add Logos and Branding to QR Codes](https://peasyqr.com/guides/add-logos-branding-qr-codes/) — Branded QR codes with logos increase scan rates and reinforce brand identity. Learn how to customize QR codes with logos, … - [Troubleshooting QR Code Scanning Problems](https://peasyqr.com/guides/troubleshooting-qr-scanning/) — QR codes that fail to scan frustrate users and waste printing costs. This guide helps you diagnose and fix the … - [Dynamic QR Codes vs Static QR Codes](https://peasyqr.com/guides/dynamic-vs-static-qr-codes/) — Static QR codes encode data permanently, while dynamic QR codes use redirect URLs that can be updated after printing. Understanding … - [QR Code Size and Resolution Guide](https://peasyqr.com/guides/qr-code-size-resolution-guide/) — Determine the optimal size and resolution for QR codes based on scanning distance, print medium, and content complexity. - [How to Create vCard QR Codes](https://peasyqr.com/guides/how-to-create-vcard-qr-codes/) — Generate QR codes that instantly add contact information to smartphones, with proper vCard formatting and testing. - [Barcode Types Compared: 1D vs 2D](https://peasyqr.com/guides/barcode-types-1d-vs-2d-compared/) — Compare 1D barcodes (UPC, EAN, Code 128) with 2D codes (QR, Data Matrix, PDF417) for different use cases. - [QR Code Security and Phishing Prevention](https://peasyqr.com/guides/qr-code-security-phishing-prevention/) — Protect against QR code phishing attacks and implement secure QR code practices for businesses and consumers. - [Troubleshooting QR Code Printing Issues](https://peasyqr.com/guides/troubleshooting-qr-code-printing/) — Fix QR codes that won't scan after printing, including resolution, contrast, and sizing problems. - [How to Generate Barcodes for Products](https://peasyqr.com/guides/how-to-generate-product-barcodes/) — Create UPC, EAN, and ISBN barcodes for retail products, including registration, formatting, and printing requirements. - [How to Generate QR Codes with Custom Designs](https://peasyqr.com/guides/how-to-generate-custom-qr-codes/) — Create branded QR codes with custom colors, logos, and patterns while maintaining reliable scannability. - [QR Code Analytics and Tracking](https://peasyqr.com/guides/qr-code-analytics-tracking/) — Track QR code scans with UTM parameters, dynamic redirects, and analytics platforms for marketing campaigns. - [Troubleshooting Barcode Scanner Compatibility](https://peasyqr.com/guides/troubleshooting-barcode-scanner-compatibility/) — Fix barcode scanning failures across different scanner types, symbologies, and environments. - [QR Codes for Restaurant Menus: Implementation Guide](https://peasyqr.com/guides/qr-codes-restaurant-menus-guide/) — QR code menus became standard during the pandemic. Learn how to implement them effectively, avoid common usability pitfalls, and provide … - [QR Code Error Correction Levels Explained](https://peasyqr.com/guides/qr-error-correction-levels-explained/) — Learn how QR code error correction works and when to use each level for optimal scanning reliability. - [QR Code Error Correction Levels: Choosing the Right One](https://peasyqr.com/guides/qr-code-error-correction-levels/) — QR codes can be partially damaged and still scan successfully. Learn how error correction works, when to use each level, … - [QR Code vs NFC Tags: Which to Use](https://peasyqr.com/guides/qr-code-vs-nfc-tags-comparison/) — Compare QR codes and NFC tags for contactless interactions, covering cost, range, and use cases. - [Troubleshooting QR Codes That Won't Scan](https://peasyqr.com/guides/troubleshooting-qr-codes-wont-scan/) — Diagnose and fix common QR code scanning failures including size, contrast, and encoding issues. - [Dynamic QR Codes: When and How to Use Them](https://peasyqr.com/guides/dynamic-qr-codes-when-how-to-use/) — Understand dynamic QR codes that allow destination changes without reprinting the physical code. - [Barcode Formats Compared: Code 128 vs Code 39 vs EAN](https://peasyqr.com/guides/barcode-formats-code128-code39-ean-comparison/) — Compare popular 1D barcode formats for density, character support, and industry requirements. - [QR Code Design: Branding Without Breaking Scannability](https://peasyqr.com/guides/qr-code-branding-design-scannability/) — Design branded QR codes with custom colors, logos, and shapes while maintaining reliable scanning. - [QR Codes for Healthcare: Patient Safety and Medication Tracking](https://peasyqr.com/guides/qr-codes-healthcare-medication-tracking/) — Healthcare facilities use QR codes on patient wristbands, medication packaging, and equipment to reduce errors and improve traceability. Learn the … - [QR Code Tracking and Analytics: Measuring Scan Performance](https://peasyqr.com/guides/qr-code-tracking-analytics/) — Without analytics, QR codes are a black box — you know they exist but not whether anyone scans them. Tracking … - [Barcode Symbology Comparison: EAN, UPC, Code 128, and More](https://peasyqr.com/guides/barcode-symbology-comparison/) — Different barcode formats serve different purposes — retail products use EAN/UPC, shipping uses Code 128, and healthcare uses DataMatrix. Choosing … - [QR Codes for Business Cards: Creating Digital vCards](https://peasyqr.com/guides/qr-codes-business-cards-vcards/) — A QR code on a business card lets recipients save contact information with a single scan instead of manual typing. … - [Comparing QR Code Error Correction Levels](https://peasyqr.com/guides/comparing-qr-code-error-correction-levels/) — QR codes use Reed-Solomon error correction to remain scannable even when partially damaged or obscured. This comparison explains the four … - [WiFi QR Codes: Connecting Guests Without Sharing Passwords](https://peasyqr.com/guides/wifi-qr-codes-guest-networks/) — WiFi QR codes let guests connect to a network with a single scan, eliminating the need to dictate complex passwords. … - [Event Ticket QR Codes: Generation, Validation, and Security](https://peasyqr.com/guides/event-ticket-qr-codes-guide/) — QR codes on event tickets must balance ease of scanning with resistance to duplication and fraud. A well-designed ticket QR … - [Payment QR Codes: Standards, Platforms, and Implementation](https://peasyqr.com/guides/payment-qr-codes-guide/) — QR-based payments are the dominant payment method in China, India, and Southeast Asia, and are growing rapidly in Western markets. … - [QR Codes in Education: Classroom and Campus Applications](https://peasyqr.com/guides/qr-codes-education-classroom-campus/) — QR codes streamline classroom workflows, campus navigation, and student engagement. From linking printed worksheets to digital resources to contactless attendance … - [QR Code Size and Scanning Distance: A Practical Reference](https://peasyqr.com/guides/qr-code-size-scanning-distance/) — A QR code that scans perfectly on a business card may be unreadable on a billboard. The relationship between code … - [Barcode Inventory Management: Setup and Best Practices](https://peasyqr.com/guides/barcode-inventory-management-guide/) — Barcode-based inventory management reduces counting errors by 67% compared to manual entry. Setting up an effective system requires choosing the … - [QR Codes for Product Packaging: Design and Compliance](https://peasyqr.com/guides/qr-codes-product-packaging/) — QR codes on product packaging bridge the physical-digital gap, linking to instructions, authentication, warranty registration, and marketing content. Packaging constraints … - [Custom QR Code Logos: Embedding Brand Identity Safely](https://peasyqr.com/guides/custom-qr-code-logos-guide/) — Embedding a logo in the center of a QR code reinforces brand identity but risks scan failures if done incorrectly. … - [Batch QR Code Generation: Techniques for Large-Scale Creation](https://peasyqr.com/guides/batch-qr-code-generation-guide/) — Generating hundreds or thousands of unique QR codes for events, inventory, or marketing campaigns requires automation. Batch generation combines template … - [QR Code Security: Risks, Attacks, and Mitigation Strategies](https://peasyqr.com/guides/qr-code-security-considerations/) — QR codes are inherently trusted by users — most people scan without hesitation. This trust creates attack vectors including phishing, … - [Micro QR Codes and Small-Format Alternatives](https://peasyqr.com/guides/micro-qr-codes-small-format/) — When standard QR codes are too large for the available space, micro QR codes and other compact formats offer alternatives. … - [Data Matrix vs QR Code: Choosing the Right 2D Barcode](https://peasyqr.com/guides/data-matrix-vs-qr-code-comparison/) — Data Matrix and QR codes are the two dominant 2D barcode formats, each optimized for different use cases. Understanding their … - [Troubleshooting QR Code Scan Failures: Diagnosis and Fixes](https://peasyqr.com/guides/troubleshooting-qr-code-scan-failures/) — When a QR code fails to scan, the cause is usually one of five common issues: insufficient contrast, inadequate size, … ## Glossary (31 terms) - [Alignment Pattern](https://peasyqr.com/glossary/alignment-pattern/) — Smaller square patterns in larger QR codes that help correct distortion when scanning at an … - [Aztec Code](https://peasyqr.com/glossary/aztec-code/) — A 2D barcode with a bullseye finder pattern in the center, used on airline boarding … - [Codabar](https://peasyqr.com/glossary/codabar/) — A self-checking 1D barcode encoding digits and a few special characters, historically used in libraries … - [Code 128](https://peasyqr.com/glossary/code-128/) — A high-density 1D barcode encoding all 128 ASCII characters, widely used in shipping and logistics. - [Code 39](https://peasyqr.com/glossary/code-39/) — A variable-length 1D barcode encoding uppercase letters, digits, and a few symbols, used in government … - [Data Matrix](https://peasyqr.com/glossary/data-matrix/) — A 2D barcode using a square or rectangular pattern, commonly used for small item marking … - [DotCode](https://peasyqr.com/glossary/dotcode/) — A 2D barcode designed for high-speed industrial printing, using a rectangular dot grid pattern readable … - [EAN-13](https://peasyqr.com/glossary/ean-13/) — A 13-digit barcode standard used worldwide for marking retail products at the point of sale. - [Error Correction Level](https://peasyqr.com/glossary/error-correction-level/) — The amount of redundant data in a QR code: L (7%), M (15%), Q (25%), … - [Finder Pattern](https://peasyqr.com/glossary/finder-pattern/) — The three large squares in the corners of a QR code that help scanners detect … - [GS1 DataBar](https://peasyqr.com/glossary/gs1-databar/) — A compact barcode family used for small items like fresh produce and coupons, encoding GS1 … - [GTIN](https://peasyqr.com/glossary/gtin/) — A GS1 identifier for products available in 8, 12, 13, or 14-digit formats, encoded in … - [Han Xin Code](https://peasyqr.com/glossary/han-xin-code/) — A 2D barcode designed for encoding Chinese characters efficiently, supporting multiple character sets and up … - [ISBN](https://peasyqr.com/glossary/isbn/) — A 13-digit numeric identifier for books, rendered as an EAN-13 barcode on book covers. - [ISSN Barcode](https://peasyqr.com/glossary/issn-barcode/) — An EAN-13 barcode encoding the ISSN of periodicals, printed on magazine and journal covers for … - [ITF-14](https://peasyqr.com/glossary/itf-14/) — A barcode format used on shipping cartons, encoding 14 digits in a compact interleaved pattern. - [Masking Pattern](https://peasyqr.com/glossary/masking-pattern/) — One of eight patterns applied to QR code data modules to ensure even distribution of … - [MaxiCode](https://peasyqr.com/glossary/maxicode/) — A fixed-size 2D barcode with a central bullseye pattern used by UPS for automated package … - [Micro QR](https://peasyqr.com/glossary/micro-qr/) — A compact QR code variant with a single finder pattern, designed for applications where space … - [Module](https://peasyqr.com/glossary/module/) — The smallest square unit (dark or light) in a QR code, equivalent to a single … - [PDF417](https://peasyqr.com/glossary/pdf417/) — A stacked 2D barcode capable of encoding large amounts of data, used on driver's licenses … - [Pharmacode](https://peasyqr.com/glossary/pharmacode/) — A 1D barcode used in pharmaceutical packaging that encodes a single number for automated packaging … - [QR Code Capacity](https://peasyqr.com/glossary/qr-code-capacity/) — The maximum data a QR code can store, ranging from 7,089 numeric characters to 4,296 … - [QR Code Version](https://peasyqr.com/glossary/qr-code-version/) — A number from 1 to 40 indicating the size of a QR code — version … - [Quiet Zone](https://peasyqr.com/glossary/quiet-zone/) — The blank margin around a QR code (minimum 4 modules wide) required for reliable scanning. - [Reed-Solomon](https://peasyqr.com/glossary/reed-solomon/) — The error-correcting code used in QR codes that enables data recovery even when part of … - [rMQR](https://peasyqr.com/glossary/rmqr/) — A rectangular QR code variant (ISO 23941) optimized for narrow or elongated spaces like labels … - [Structured Append](https://peasyqr.com/glossary/structured-append/) — A QR code feature that splits data across up to 16 linked QR codes, reconstructed … - [UPC-A](https://peasyqr.com/glossary/upc-a/) — A 12-digit barcode format used primarily in North America for tracking trade items in retail … - [vCard QR](https://peasyqr.com/glossary/vcard-qr/) — A QR code encoding contact information in vCard format, scannable to add a contact directly … - [WiFi QR](https://peasyqr.com/glossary/wifi-qr/) — A QR code encoding WiFi network credentials (SSID, password, encryption type) for instant device connection. ## API Base URL: https://peasyqr.com/api/v1/ | Endpoint | Description | |----------|-------------| | GET /api/v1/tools/ | List all tools (filterable by category) | | GET /api/v1/tools/{slug}/ | Tool detail with description, steps, FAQ | | GET /api/v1/categories/ | Tool categories | | GET /api/v1/formats/ | File formats reference | | GET /api/v1/conversions/ | Format conversion guides | | GET /api/v1/glossary/ | Terminology definitions | | GET /api/v1/glossary/{slug}/ | Term with simple + technical explanations, code examples, references | | GET /api/v1/guides/ | Educational guides (filterable by category, audience_level) | | GET /api/v1/guides/{slug}/ | Full guide with content, takeaways, ToC, related guides | | GET /api/v1/use-cases/ | Real-world use cases | | GET /api/v1/search/?q={query} | Cross-model search | | GET /api/v1/sites/ | All 16 Peasy sites | OpenAPI spec: https://peasyqr.com/api/openapi.json Swagger UI: https://peasyqr.com/api/docs/ ## Content Negotiation All pages support Markdown output for AI agents: - Add `?format=md` to any page URL - Or send `Accept: text/markdown` header ## Platform Stats - 251 tools across 16 sites - 131 file formats documented - 1484 format conversion guides - 695 glossary terms - 645 educational guides - 302 real-world use cases Full catalog: https://peasyqr.com/llms-full.txt