JSON Formatter & Validator

Format, validate, and beautify JSON data.

100% free
No sign-up
Instant results
Privacy-friendly

JSON input

About the JSON Formatter & Validator

Format, validate, and beautify JSON data. The JSON Formatter & Validator on The 360 Tools is fast, accurate and completely free — no account, no downloads and no usage limits.

Like every tool in our developer collection, the JSON Formatter & Validator runs directly in your browser. Your input is processed locally whenever possible, so results are instant and your data stays private.

Use the interactive widget above for an immediate answer, then read the how-it-works steps and FAQs below if you want to understand the calculation, common edge cases, or how this tool compares with similar utilities. We keep explanations practical so you can apply the result with confidence.

How it works

1 Paste your input or adjust the visual controls
2 Output is validated and formatted instantly
3 Copy production-ready code or download the asset

Frequently asked questions

Is the JSON Formatter & Validator free to use?

Yes. The JSON Formatter & Validator is completely free with no sign-up, no hidden charges and no usage limits. All tools on The 360 Tools are free forever.

Is my data safe when using the JSON Formatter & Validator?

Yes. Your input is processed locally in your browser whenever possible and is never stored on our servers or shared with third parties.

Does the JSON Formatter & Validator work on mobile?

Yes. The JSON Formatter & Validator is built mobile-first and works on any modern phone, tablet or desktop browser without installing anything.