JSON formatter
Format, validate and minify JSON instantly in your browser.
How to use
- Paste your JSON into the input box.
- Choose Format to pretty-print it or Minify to compact it.
- If there is a syntax error, the message tells you what to fix; otherwise copy the result.
Frequently asked questions
Does it validate my JSON?
Yes. Formatting parses the JSON, so invalid input produces a clear error message instead of output.
What indentation does it use?
Formatting uses a two-space indent, which is the most common convention for readable JSON.
Is my JSON sent to a server?
No. Parsing and formatting run entirely in your browser; your data never leaves your device.
About this tool
A JSON formatter makes machine-generated or minified JSON readable by indenting it consistently, and it validates the structure at the same time. Paste API responses, configuration files or log payloads to pretty-print them, or switch to Minify to strip whitespace for production. If the JSON is malformed, the exact parser error is shown so you can pinpoint the problem. As with every KonverterTeks tool, parsing happens locally and your data is never uploaded.