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Format, validate, encode, decode, generate, and more. Every tool is free, fast, and works entirely in your browser.
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Our most popular and frequently used tools
Encode and decode Base64 strings online free
Encode and decode URLs and URL components online free
Format, validate, and minify JSON data with syntax highlighting
Minify, beautify, and validate JavaScript code with customizable options
Format and beautify SQL queries with syntax validation
Compare two JSON objects and highlight their differences side-by-side
Beautify and style JSON data with configurable indentation and color themes
Generate UUIDs (Universally Unique Identifiers) v4 and v7
Generate secure, random passwords with customizable options
Generate customizable QR codes with advanced styling options
Convert JSON data to CSV format with advanced formatting options
Convert Unix timestamps to human-readable dates and back
Generate TypeScript interfaces and types from JSON data
Decode and analyze JWT tokens online free
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes for text and files
Compress images with quality control for JPEG, PNG, and WebP formats
Resize, compress and convert images with batch processing support
Test and debug regular expressions with real-time matching, capture groups, and extended flags
Count words, characters, sentences, and analyze text readability with Flesch scores
Calculate subnet masks, CIDR notation, and IP ranges
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Tutorials, guides, and best practices
Learn the fundamentals of JSON syntax, structure, and common use cases in modern web development.
A comprehensive guide to JSON Web Tokens, how they work, and best practices for implementation.
Best practices for optimizing images for the web without sacrificing quality.
How to create and manage secure passwords, plus common pitfalls to avoid.
What Base64 is, how it works, and when to use it in web development.
How to minify CSS for production and why it matters for performance.
Learn regular expressions from basics to advanced patterns with practical examples.
Everything you need to know about Unix timestamps, timezones, and date handling.
A guide to HTML entities, special characters, and why encoding matters for security.
Compare JSON, YAML, TOML, and XML to choose the right format for your project.
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