JSON Formatter
Validate, format, beautify and minify JSON instantly
Result appears here…Parsing happens locally in your browser. API keys and private data in your JSON are never uploaded.
About this tool
Debugging an API? Reading a minified config? The JoliTools JSON formatter turns dense, single-line JSON into readable, indented structure, or compresses pretty JSON down to a minimal payload for production.
Validation is built in: paste malformed JSON and you get a human-readable error with the exact location of the problem instead of a cryptic console message. Common culprits like trailing commas, comments and single quotes are flagged clearly.
How to use the json formatter
- 1Paste your JSON into the input box (or type it directly).
- 2Click “Format” to beautify it with clean indentation.
- 3Use “Minify” to strip all whitespace for production payloads.
- 4If the JSON is invalid, a clear error message shows the position of the problem.
- 5Copy the result with one click.
Good to know
Privacy matters for developers too: tokens, secrets and customer data in your JSON never leave your machine, unlike server-side formatters that upload everything you paste.
Frequently asked questions
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