JSON Formatter & Validator
Format, minify, sort and validate JSON in your browser, with precise parse error reporting. Nothing is sent to a server.
How to use
Paste JSON into the input, then use Format for a pretty-printed result, Minify for a compact one, or Sort keys to order object keys alphabetically at every level (array order is preserved). Validate only checks the input without touching the output. Indentation can be 2 spaces, 4 spaces or tabs.
Notes
Everything runs in your browser; your JSON is never sent to a server. Syntax errors show the browser's own JSON parser message. Very large documents may take a moment to format.
FAQ
Can it format JSON with comments (JSONC)?
No. It uses the standard JSON parser, so comments and trailing commas produce an error.
How are numeric-looking keys sorted?
Keys are sorted as strings, so "10" comes before "2".