JSON Formatter
Format, pretty-print, and validate JSON in your browser.
JSON Validator
Validate JSON syntax and pinpoint errors with clear location hints.
Input data is processed in your browser
Data is never sent to a server
Tool
What is JSON Validator?
JSON Validator checks whether your JSON text is syntactically correct. When there is an error, it shows the error message and highlights the approximate location. When the JSON is valid, it displays structural information such as the number of keys, maximum nesting depth, and array count. Useful for debugging API responses, configuration files, and hand-written JSON.
How to Use
- Paste your JSON into the input field.
- Click "Validate" or enable auto-validate to check in real time.
- If the JSON is invalid, the error message and approximate location are shown.
- If the JSON is valid, structural stats such as key count and max depth are displayed.
FAQ
How is this different from JSON Formatter?
JSON Formatter focuses on pretty-printing and minifying. JSON Validator focuses on syntax checking, error location, and structural statistics.
How is the error location shown?
The tool extracts the characters around the parse error position and places a "^" marker below the problem character.
Is my data sent to a server?
No. All processing happens in your browser. Nothing is sent to a server.
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