Tools
JSON & CSV

JSON Formatter & Beautifier

Tired of squinting at minified JSON? Paste it here and instantly get a clean, indented, color-friendly view. The formatter also validates your JSON and highlights errors so you can fix broken syntax in seconds.

100% Client-Side — Your Data Never Leaves Your Browser

What is JSON Formatter & Beautifier?

Pretty-print and validate JSON in one click. Tired of squinting at minified JSON? Paste it here and instantly get a clean, indented, color-friendly view. The formatter also validates your JSON and highlights errors so you can fix broken syntax in seconds. The tool runs 100% in your browser — nothing is uploaded to a server, so your data stays private, and it is free to use with no signup required.

Quick Answers

Will this tool fix my invalid JSON?
No, but it will tell you precisely that your JSON is invalid. Use a JSON validator mindset: correct the reported error (often a missing comma, quote or brace) and reformat again.
Is the JSON formatter free?
Yes, completely free with no signup, no limits and no server uploads. Everything runs locally in your browser.
What indentation does the formatter use?
Two spaces, which matches the most common JavaScript and Python style conventions.
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How do I use JSON Formatter & Beautifier?

  1. Paste minified or messy JSON into the input box.
  2. The pretty-printed result appears instantly.
  3. Copy it or download the formatted .json file.

Why use our json formatter & beautifier?

This JSON beautifier formats any valid JSON with two-space indentation, making nested structures easy to read and debug. It doubles as a JSON validator: invalid JSON produces a clear error message instead of a silent failure. Since formatting runs entirely in your browser, API responses, config files and test fixtures with sensitive values stay private. Pair it with the JSON minifier to compress payloads before shipping them to production.

Minified vs pretty-printed JSON

This tool re-indents compact JSON into a readable layout. The two forms are semantically identical — only the whitespace differs.

AspectMinified JSONPretty-printed JSON
ReadabilityOne long line, hard to scanIndented with newlines, easy to scan
File sizeSmallest possibleLarger due to whitespace
TransferPreferred for APIs and cachingPreferred for debugging and logs
DiffingLine-based diffs are meaninglessLine-based diffs show real changes
EditingError-proneEasy to edit by hand

Making a minified API response readable before debugging

A one-line JSON response from a REST API is hard to read when you are debugging an integration. Formatting it with indentation is the difference between squinting and scanning.

Minified input

{"ok":true,"data":{"users":[{"id":1,"active":true},{"id":2,"active":false}],"total":2}}

Formatted JSON

{
  "ok": true,
  "data": {
    "users": [
      { "id": 1, "active": true },
      { "id": 2, "active": false }
    ],
    "total": 2
  }
}

Paste the minified body from a webhook or a curl response and instantly get an indented view with nested structure you can actually read.

Frequently Asked Questions