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JSON Formatter & Validator
Format, validate, and minify JSON data. Syntax highlighted output with error reporting.
About json formatter
Format, validate, and minify JSON data. Syntax highlighted output with error reporting.
Everything is computed with plain JavaScript in your browser — what you type or paste stays on your device. It is free, needs no account and works offline once the page has loaded.
Features
- Syntax highlighted output with error reporting.
- Instant results as you type
- Nothing is sent to a server
- Copy to clipboard in one click
- Free, with no account required
- Works on desktop, tablet and phone
How to json formatter online
Open the tool
No sign-up and nothing to install — the tool is ready as soon as the page loads.
Enter your input
Choose format, minify or validate; errors are reported with line numbers.
Copy or download
Copy the output to your clipboard or download it. Your input never leaves the browser.
Frequently asked
Is what I enter sent to a server?
No. JSON Formatter & Validator runs entirely in your browser using plain JavaScript in your browser. Your input never leaves your device and we don’t store anything.
What input does it accept?
Plain text, pasted or typed. Nothing you enter is sent to a server.
Is there a usage limit?
No. Use it as often as you like.
Is JSON Formatter free? Do I need an account?
Yes, it is completely free and there is no account, sign-up or watermark. It is one of 78 free browser tools from ModelsGroup.
Does it work on my phone?
Yes. It works in any modern mobile or desktop browser.
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