ToolRun Developer Tools
Everyday utilities for developers and designers. JSON Formatter validates and pretty-prints JSON, Regex Tester shows matches as you type, and the Base64 and URL encoders convert data in both directions. Image to Base64 embeds images in HTML or CSS, Color Converter translates between HEX, RGB, and HSL, and UUID Generator creates unique IDs. Everything runs locally, so API keys and private data stay on your machine.
JSON Formatter
Format, minify, and validate JSON data with syntax highlighting. Beautify messy JSON instantly.
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings back to plain text. Supports UTF-8 encoding.
URL Encoder / Decoder
Encode or decode URL components using percent-encoding. Essential for working with query strings, API parameters, and special characters in URLs.
Regex Tester
Test and debug regular expressions with real-time match highlighting, capture groups, and match details.
Color Converter
Convert colors between HEX, RGB, and HSL formats. Live preview and bidirectional sync.
Image to Base64
Convert images to Base64 encoded strings and data URIs for embedding directly in HTML, CSS, or JavaScript code.