Free Online Developer Tools

Format, minify, and validate JSON data in your browser.

Encode and decode Base64 text instantly.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes.

Encrypt and decrypt text locally with AES

Inspect a JWT header, payload, and expiry locally

Compare two JSON documents locally to see added, removed, and changed fields

Safely encode and decode URLs and special characters.

Parse a URL’s protocol, domain, path, and query parameters

Pick colors and convert between popular color formats.

Pick colors from any image — HEX, RGB, HSL and a dominant palette

Remove the visible Gemini watermark from AI images in your browser. Nothing is uploaded.

Test regular expressions with clear match highlighting.

Create downloadable QR codes from text and common templates.

Decode QR code content from an image

Generate strong, customizable random passwords.

Generate UUID / GUID values in bulk

Infer TypeScript types from JSON

Parse a cron expression and list upcoming run times

Calculate subnet details from an IPv4 address and CIDR prefix

Convert integers between binary, octal, decimal, hexadecimal, and other bases