JSON Validator
Validate, format, and minify JSON — see parse errors with exact line/column.
How to Use
- Paste JSON on the left.
- Errors are reported with line and column.
- Use format / minify buttons to beautify or compact.
Common errors
About the JSON Validator
Need a hand with web development and data tasks? The JSON Validator does the work for you — free, and right here in your browser. Validate, format, and minify JSON — see parse errors with exact line/column.
How it works
Type in what you have, and the answer shows up right away. Change anything and it updates by itself. Everything runs in your browser, so it is fast and nothing you type is sent away.
Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.
Frequently Asked Questions
How do I use the JSON Validator?
Just type your numbers. The answer shows up right away — there is no button to press. Change anything and it updates by itself.
Is it free? Does it work without internet?
Yes to both. It is free with no sign-up, and once the page has loaded it keeps working even with no internet.
Where does my data go?
Nowhere — every calculation runs on your own device. Nothing you enter is uploaded, logged, or stored.
Common Use Cases
Try different numbers
Change one thing and watch the answer change. It is an easy way to compare your choices.
Nothing to set up
Open the page and start. There is nothing to install, and no account to make.
Check your work
Worked it out yourself? Use the JSON Validator to make sure your answer is right.
Safe and private
Everything you type stays on your device. Nothing is sent to a server or saved.
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