JSON Formatter
Format and validate JSON instantly. Free online JSON formatter — paste messy JSON, beautify or minify, catch errors in your browser.
Processed locally in your browserHow?
This tool runs in this browser tab. The files, text and values you enter are not uploaded to clkr.work servers — closing the tab clears them. Anonymous usage events (such as which button was pressed) are counted, never your content. Privacy policy
What next?
Found it useful? Share JSON Formatter
Free, no sign-up, works in the browser — send it to a friend or add it to your site.
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Part of the toolkit
How to use JSON Formatter
- 1Paste your JSON into the editor
- 2Click Format to beautify, or Minify to compress
- 3Fix any validation errors shown, then copy the result
Frequently asked questions
Is this JSON formatter free?▾
Yes. No signup, no limits, no payment.
Is my JSON uploaded to a server?▾
No. Formatting and validation run entirely in your browser.
Does it validate JSON?▾
Yes. Invalid JSON shows a clear error message so you can fix it quickly.
Embed JSON Formatter on your website▾
Paste this snippet into your page. The embedded tool runs in your visitor's browser and shows a small “Powered by clkr.work” link.