Guide - Developer
Make messy JSON readable, catch syntax errors, and minify for production - all in your browser.
Formatting (or beautifying) adds consistent indentation and line breaks so JSON is easy to read. Validation checks that the syntax is correct - matching brackets, quoted keys, and commas in the right places.
Paste your JSON and choose Beautify to indent it, Validate to check for errors, or Minify to strip whitespace for smaller payloads. The result updates instantly and never leaves your browser.
The usual culprits are trailing commas, single quotes instead of double quotes, unquoted keys, and missing brackets. A validator points to the exact spot so you can fix it fast.
Clean, valid JSON prevents API failures and makes debugging far easier. Minified JSON loads faster in production.
Beautify adds spacing for readability; minify removes all unnecessary whitespace to make the file as small as possible.
No. Formatting, validation, and minifying happen entirely in your browser.
Tools and guides to go further.