A collection of free browser-based tools for everyday development tasks. No sign-up required, no tracking, no ads.
Paste your code and get clean, consistently formatted output. Supports JavaScript, Python, HTML, and CSS.
Try it →Validate and beautify JSON payloads instantly. Highlights errors with line numbers and suggestions.
Try it →Test regular expressions against sample text with real-time matching, group extraction, and cheatsheet.
Try it →Generate SHA-256, SHA-512, and MD5 checksums for any text input. Runs entirely in your browser.
Try it →Encode or decode Base64 strings for data URIs, API payloads, and configuration files.
Try it →Convert between HEX, RGB, and HSL color formats with a visual preview and clipboard copy.
Try it →Choose from the utilities above based on what you need to do.
All processing happens locally in your browser. Nothing is sent to any server.
Get your formatted code, validated JSON, or converted output in one click.