Free Online Tool
JSON Formatter
Pretty-print and validate JSON with proper indentation.
JSON Formatter lets you pretty-print and validate JSON with proper indentation. Paste your code below and the formatted result appears immediately — no waiting, no upload, and nothing saved anywhere.
How to use JSON Formatter
- Paste your original code into the input box.
- Adjust the indent size if you want different spacing.
- Review the formatted result as it updates.
- Copy the formatted result, or download it as a .txt file.
- Use Clear to start over with new code.
Key features
- Formats and beautifies your input directly in your browser.
- 100% private — your code stays in your browser.
- Free to use, with no sign-up and no daily limit.
- Handles both short snippets and long files well.
Questions
Frequently asked questions
Is JSON Formatter free to use?
Yes — JSON Formatter is completely free, with no sign-up, no trial period, and no hidden limits.
Is my text uploaded anywhere when I use JSON Formatter?
No. JSON Formatter runs entirely in your browser using JavaScript. Your text is processed on your own device and is never sent to a server.
Can I use JSON Formatter on my phone?
Yes. JSON Formatter works in any modern browser, including on mobile devices, with no app to install.
Is there a limit to how much text I can use?
There's no artificial limit. Because everything runs in your browser rather than on a server, JSON Formatter can generally handle as much text as your device can comfortably process.
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