How to use
Paste JSON or choose a local .json file. Validity updates as you edit. Pick Format or Minify, run the operation, then Copy or Download the current result without replacing your source.
JSON formatter
Validate, format, or minify strict JSON locally.
Paste JSON or choose a local file, see validity as you edit, then keep source and result separate while you format, minify, copy, or download.
Strict JSON onlyRuns locally1 MiB source limit
JSON formatter workspace
Source
0 characters · 0 / 1,048,576UTF-8 bytes
Result
Quick feedback
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Privacy
Validation and processing run in a browser worker on your device. JSON source, result values, and filenames are not sent to BeanNest processing services or placed in page URLs, browser storage, or analytics payloads.
Limitations
This tool uses strict JSON.parse semantics: no JSON5, comments, trailing commas, schema validation, key sorting, remote URL loading, repair, history, or AI. Source is limited to 1 MiB. Very large results may hide the on-page preview while Copy and Download remain available.