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JSON Viewer & Formatter

Open, validate, and format JSON in a readable browser preview for free. Your data stays on your device.

JSON preview

Paste JSON below or choose a UTF-8 .json file up to 10 MB. Processing stays in your browser.

How to use JSON Viewer & Formatter

  1. Paste JSON or choose a .json file from your device.
  2. Select View data to validate and format it.
  3. Inspect the readable, indented preview without uploading the file.

Privacy and limits

Your file is read locally by your browser and is not uploaded to FreelancerKit. Preview is limited to files up to 10 MB, 1,000 rows, and 100 columns so a large file cannot freeze the page.

Common questions

Is my JSON uploaded?

No. Parsing and formatting happen locally in your browser.

Will this fix invalid JSON?

The viewer identifies invalid JSON but does not guess at corrections that could change your data.