JSON Validator
Check whether JSON is valid, pinpoint the line and column of syntax errors and flag duplicate keys.
Runs in your browserJSON → Report
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Example
{"name":"Ada","tags":["math"]}✓ Valid JSON Top-level type: object (2 keys) Nesting depth: 2 Total values: 4
How to use the JSON Validator
- Paste or type your JSON into the input area, or open a file from your device.
- Adjust the options above the editor if the tool offers any.
- Review the Report result, then copy it or download it as a file.
Privacy and limitations
- Your data is processed on your device and is not uploaded to any server.
Frequently asked questions
What are the most common JSON errors?
Trailing commas, single-quoted strings, unquoted keys and comments. JSON allows none of them; the report shows exactly where the parser stopped.
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