Developer toolkit
Format or minify JSON, XML, SQL and HTML. Compare two texts line by line. Encode and decode Base64 and URLs. Read the header and payload of a JWT. Paste your data and use the tool you need.
Nothing leaves your browser. Your text is processed on this page and is not sent to a server.
Comparison is line by line, up to 2,000 lines per version. Lines removed from A are red; lines added in B are green.
This only reads the header and payload. It does not verify the signature, so do not trust the claims until your server has checked the token.
Formatting uses standard parsers for JSON and XML. SQL and HTML layouts are basic and may not match a full formatter exactly. Check the output before you use it.