Developer Tools

Browse our collection of free, privacy-focused developer utilities. All tools run entirely in your browser.

Convert between JSON, YAML, and TOML formats instantly. Free online converter with automatic format detection and validation.

Decode and inspect JSON Web Tokens (JWT) instantly. View header, payload, and signature without verification. Free online JWT decoder.

Visualize and understand cron expressions. See next run times, get human-readable descriptions, and validate cron syntax.

Test and debug regular expressions online. Interactive regex tester with syntax highlighting, match visualization, and capture groups.

Generate random UUID v4 identifiers instantly. Bulk generate UUIDs with options for uppercase and hyphen-free formats.

Generate SHA-256, SHA-384, and SHA-512 hashes instantly. Secure hash calculator for text and data verification.

Convert Unix timestamps to readable dates and vice versa. Support for seconds, milliseconds, ISO 8601, and timezone conversions.

Format and beautify SQL queries online. Support for multiple SQL dialects with minification and comment preservation options.

Compare text and code to find differences. Side-by-side diff viewer with options for ignoring whitespace and case sensitivity.

Encode and decode Base64 data instantly. Support for text, files, and Base64url format with validation and error handling.

Generate JSON Web Tokens (JWT) for testing and development. Create custom header and payload, sign with HMAC algorithms. Free online JWT generator.

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats instantly. Live color preview, palette generator, and color picker tool.

Generate strong, secure passwords with customizable options. Check password strength with real-time analysis and security recommendations.