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JSON Formatter & Prettifier

Format minified JSON strings into clear, beautifully indented structure with instant syntax check.

Indent:

About JSON Formatter & Prettifier

Prettify and format minified JSON into a human-readable structure. Text and data chores like formatting, validating and converting are small tasks that interrupt real work.

Everything runs locally in your browser using standard web APIs — nothing is uploaded, queued, or stored on a server. Your files never leave your device, so there is no privacy trade-off, no file-size limit imposed by an upload, and no waiting for a round trip. It also means the tool keeps working on a slow or intermittent connection, and there is nothing to delete afterwards.

How to use JSON Formatter & Prettifier

  1. 1Paste your text. Drop your content into the input panel above.
  2. 2Review the output. JSON Formatter processes it as you type — no submit button.
  3. 3Copy the result. Copy the output to your clipboard or download it as a file.

Frequently asked questions