Developer Toolbox
Format JSON, decode JWTs, convert timestamps and diff text, all in your browser.
JSON Formatter 📌 Format, validate and minify JSON with clear error messages. Unix Timestamp Converter 📌 Convert Unix timestamps to dates and back, in seconds or milliseconds. Base64 Encode / Decode 📌 Encode and decode Base64 text or convert files to data URIs. JWT Decoder 📌 Decode JWT header and payload without your token leaving the page. Diff Checker 📌 Compare two texts and highlight changes line by line or word by word. UUID & Hash Generator 📌 Generate UUIDs and compute MD5, SHA-1, SHA-256 or SHA-512 hashes. Command Line Builder
Beta
📌 Paste a long command, edit each flag and value in its own box, copy it back.
Developer utilities without the upload risk
Every tool here runs as plain JavaScript in your browser, so nothing you paste is sent to a server. Pin the tools you use daily with the 📌 button, or press ⌘K anywhere to jump straight to one.