Developer Tools - Free Online Utilities

    Multiline Formatter
    Text Case Converter
    Lorem Ipsum Generator
    Text Sort & Dedup Tool
    Unicode & Emoji Browser
    CSV to JSON/XML Converter

    JSON Formatter
    JavaScript Formatter
    SQL Query Formatter
    XML Formatter & Validator
    Regex Tester
    Diff Tool
    Number Base Converter

    CSS Unit Converter
    CSS Formatter & Minifier
    HTML Entity Tool
    Markdown Editor & Preview
    Markdown to HTML Converter

    HTTP Request Builder
    QR Code Generator

    Hash Generator
    JWT Decoder
    Password Generator
    Base64 Encoder/Decoder
    URL Encoder/Decoder
    UUID/GUID Generator

    SVG Icon Generator
    Email Template Builder
    Image Optimizer & Converter
    Color Converter

    Environment Variables Manager
    Kubernetes YAML Generator
    Cron Expression Parser

    AI Prompt Generator & Optimizer
    OpenAI Token Counter & Cost Calculator
    AI-Powered Mock Data Generator

    World Time
    Timestamp Converter

    Developer Blog
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QR Code Generator

Professional QR code generator with single/batch generation, multiple formats (PNG/SVG/PDF), customization, and template browser.

QR Code Content
Generated QR Code
Customization

Size: 200px

Margin: 4 modules

Foreground Color
Background Color
QR Code Information
Content Length32 characters
Error CorrectionM (~15%)
Output Size200×200px
FormatPNG
QR Code Types & Formats
Quick Reference:

URL: https://example.com

WiFi: WIFI:T:WPA;S:NetworkName;P:Password;H:false;

Email: mailto:name@example.com?subject=Hello

Phone: tel:+1234567890

SMS: sms:+1234567890?body=Message

Location: geo:37.7749,-122.4194

vCard: BEGIN:VCARD...END:VCARD

Event: BEGIN:VEVENT...END:VEVENT