Free Developer Tools
Free online developer tools to boost your productivity. Format JSON, generate regex, create UUIDs, and more. All tools run in your browser β fast, private, and free.
JSON Formatter
Format, validate, and beautify your JSON data with syntax highlighting and instant error detection.
Regex Generator
Build, test, and debug regular expressions with real-time matching and pattern explanations.
UUID Generator
Generate unique UUIDs (v4) for your applications with one click, supporting bulk generation.
Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa with timezone support.
SQL Explain
Visualize and explain SQL query execution plans with formatted output and performance tips.
YAML Converter
Convert between YAML, JSON, and other formats with validation and formatting tools.
Text Diff
Compare two texts side by side and highlight the differences line by line with word-level accuracy.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings. Supports file-to-Base64 conversion and image preview.
JWT Decoder
Decode and inspect JWT tokens. View header, payload, signature, and check expiration status.
URL Encoder/Decoder
Encode and decode URLs with support for batch processing. Includes full URL parsing with component breakdown.
Cron Expression Descriptor
Convert cron expressions to human-readable descriptions and preview the next execution times.
SVG Path Optimizer
Optimize SVG files by removing metadata, comments, and reducing precision. Preview and compare file sizes.
Icon & Favicon Generator
Generate multi-size icons and favicons from a single image. Includes Apple Touch Icons, Android icons, and web manifest.
JSON Compare
Compare two JSON objects and find differences. Visual diff for keys, values, and structure.
JSON Schema Generator
Generate JSON Schema from JSON data. Auto-detect types, required fields, and nested objects.
JSON Escape
Escape and unescape JSON strings. Convert between raw text and JSON-safe strings.
CSV to JSON
Convert CSV data to JSON format. Auto-detect headers, handle commas in quotes, nested structures.
XML to JSON
Convert XML to JSON format. Handle attributes, nested elements, and arrays automatically.
HTML Beautifier
Beautify and format HTML code. Auto-indent, fix formatting, and make HTML readable.
JS Beautifier
Beautify and format JavaScript code. Auto-indent, organize imports, and improve readability.
CSS Minifier
Minify CSS code to reduce file size. Remove whitespace, comments, and optimize rules.
JWT Generator
Generate JSON Web Tokens (JWT) with custom payload, secret, and expiration.
Hash Generator
Generate SHA-256, SHA-512, and other hash digests from text. Fast, client-side hashing.
MD5 Generator
Generate MD5 hash from text. Quick checksum for data integrity and legacy systems.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK formats. Visual color picker included.
QR Code Generator
Generate QR codes from text, URLs, or contact info. Download as PNG or SVG.
API Tester
Test REST APIs with custom headers, methods, and body. View response time and status.
Webhook Tester
Generate temporary webhook URLs to test incoming requests. View payloads in real-time.