Free JSON Formatter

🟢 Runs Locally — verified: your files are processed in this browser. No uploads.

Indent, validate and debug JSON in one paste — choose 2-space, 4-space or tab indentation.

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Runs entirely in your browser — paste text and watch the results update instantly. Nothing is uploaded.

100% Client-Side — Your text stays in your browser. Nothing is uploaded.

How to use this tool

  1. 1

    Paste your JSON

    Minified API responses, config files or copied snippets.

  2. 2

    Pick an indent

    2 or 4 spaces for screenshots, tabs for compact style — output updates instantly.

  3. 3

    Copy the formatted result

    Clean, human-readable JSON ready for review, sharing or docs.

Key features

InputOutput
{"a":1,"b":[1,2]}Indented across lines
Malformed {oopsInline error with position hint
2 vs 4 vs tabIndent fully switchable
Arabic & emoji valuesPreserved verbatim

Privacy: your text never leaves your browser

Every Toolflect Text Tool is 100% client-side. The moment you type or paste text, it is analyzed by JavaScript running inside this browser tab. Your text is never sent to our servers, never stored in a database, and never shared with any third party or AI service. Visit counting (see the note at the foot of this page) is separate from your text and never receives it.

  • No uploads, no accounts, no sign-up
  • Your text is processed locally in your browser and never stored.
  • Works offline once the page has loaded
  • Close the tab and your text is gone from memory

You can even verify it yourself: open your browser's developer tools, switch to the Network tab, and type into the tool — no request ever carries your text. You will also see the Google Analytics request that counts the visit; it carries a page view and never anything you typed, and no cookie or identifier is stored until you accept analytics.

Frequently asked questions

Does it validate while formatting?
Yes — invalid JSON produces a clear inline error instead of garbage output.
Can I change the indentation?
Switch between 2 spaces, 4 spaces or a tab from the Indent control.
Are non-ASCII values preserved?
Absolutely — Arabic text and emoji pass through unchanged.
Does anything get uploaded?
No — formatting happens entirely inside your browser.

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Your text stays in your browser and is not uploaded. We use Google Analytics to count visits; until you choose it runs without cookies and stores nothing on your device. · Privacy Policy