JSON Formatter
Format, minify, and validate JSON with optional key sorting.
- Browser-based
- No signup
Developer
Private: processed on your device
Paste JSON to validate syntax instantly. Invalid JSON shows parse errors with line and column when available. Validation runs entirely in your browser.
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
1. Paste or type JSON into the input area. 2. Read Valid JSON or the error message shown below the editor. 3. Fix syntax issues such as trailing commas or mismatched brackets. 4. Re-check until the validator reports success.
Example: {"name":"Utilnivo","active":true} validates successfully; {"name":} shows a parse error pointing to the problem.
Paste JSON to validate syntax instantly. Invalid JSON shows parse errors with line and column when available. Validation runs entirely in your browser.
Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.
Your data is processed in your browser and is not uploaded to our server.
Yes. Utilnivo tools are free to use and do not require an account.
Utilnivo does not require an account. See the privacy note on this page for how your data is processed for this tool.
Open the tool on this page, enter your inputs, and use the on-screen controls. No account is required.
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Results update as you type. Nothing is stored or sent to a server.
Paste content to validate.