JSON Formatter

What is JSON Formatter?

JSON Formatter is a free, in-browser tool to pretty-print, minify, and re-indent JSON safely. Paste valid or slightly-broken JSON and get clean, readable output instantly — with syntax-aware highlighting and one-click copy. Ideal for inspecting API responses and config files.

Used by

• Backend developers
• Frontend developers
• QA engineers
• Students
• Developers
• Technical writers

Recommended workflow

1. 1

   Prepare the input

   Format or minify the data before sharing it, committing it, or using it as a readable example.

2. 2

   Run JSON Formatter

   Review the preview, copy or download the result, and keep everything local in your browser.

3. 3

   Next recommended tool

   JSON Validator: Validate JSON syntax with helpful error messages.

   Open tool
4. 4

   Then continue with

   Fix Broken JSON: Repair trailing commas, single quotes, comments.

   Open tool
5. 5

   Then continue with

   JSON ↔ YAML: Convert between JSON and YAML in either direction.

   Open tool

Frequently asked questions

How do I use JSON Formatter?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Pretty-print, minify, and indent JSON safely.

Is my data uploaded or stored anywhere?

No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.

Is JSON Formatter free?

Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.

What's the maximum file size?

There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.

Do I need to install anything?

No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.