Free JSON Formatter

Format and pretty-print messy JSON with proper indentation and structure.

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  • 🔒 Files never leave your device
  • ⚡ Converted in your browser
  • ✅ No account required

JSON Formatter: The Complete Guide

Paste minified, escaped, or messy JSON and get clean, readable, properly indented output instantly. Choose your indent size and optionally sort keys alphabetically — all in your browser.

How to use the JSON Formatter

  1. Paste or type your code, text, or data into the input box.
  2. Adjust options such as indent size, dialect, or flags when the tool offers them.
  3. The output updates instantly — copy it to your clipboard or download the file.

Features

  • Pretty-print with 2/4-space or tab indent
  • Optional alphabetical key sorting
  • Instant, as-you-type formatting
  • Copy or download the result

Why use this tool

  • Read and debug API responses faster
  • Spot structure and nesting at a glance
  • No size limits and nothing leaves your device

What is a JSON formatter?

A JSON formatter takes JSON (JavaScript Object Notation) — the most common data format for APIs and config files — and re-indents it into a clean, hierarchical, human-readable layout. It's used by developers to inspect API responses, debug payloads, review config files, and prepare JSON for documentation.

Frequently Asked Questions

Does it change my data?

No — formatting only adds whitespace and indentation. Your keys, values, and order stay the same (unless you enable key sorting).

Will it fix invalid JSON?

It can't repair broken JSON, but it will pinpoint the syntax error so you can fix it. Use the JSON Validator for detailed checks.

Is it free and private?

Yes — it's 100% free with no signup, and everything runs locally in your browser, so your data is never uploaded to a server.

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