JSON Validator
Check whether a JSON string is valid and locate the first error.
JSON Validator
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About this tool
Check whether a JSON string is valid and locate the first error.
How to use JSON Validator
- Paste or type your input in the Input box — or click Sample to load example data.
- Adjust the options (if any) that appear above the output.
- Click Run to see your result instantly.
- Use Copy or Download to save the output.
All processing happens locally in your browser, so your data never leaves your device.
Features
- 100% free with no sign-up or usage limits
- Runs entirely in your browser — nothing is uploaded to a server
- Sample data built in so you can try it immediately
- Copy and download your output in one click
- Works on desktop and mobile
Frequently asked questions
Is JSON Validator really free?
Yes. Every tool on TutsFx is completely free to use, forever.
Does JSON Validator send my data anywhere?
No. JSON Validator runs entirely in your browser using JavaScript, so your input never leaves your device.
Do I need an account to use it?
No account, sign-up or login is required to use any TutsFx tool.
Can I share my output?
Yes. Use the Copy or Download buttons to save your result, or take a screenshot to share it.
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