JSON Validator
Check JSON syntax and see clear parsing errors locally.
Your input is processed locally in your browser. It is not saved, logged, or sent with analytics.
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Run: Ctrl/⌘ + Enter · Clear: Ctrl/⌘ + Shift + X
Validation result
Enter a value to begin.
What this calculator does
Validate JSON structure in your browser without uploading code or data.
Inputs and what they mean
- JSON
- — text value.
How to use it
- Paste or enter content in the editor.
- Adjust any options for the result you need.
- Copy or download the locally processed output.
Formula
Validation uses the browser's standards-compliant JSON parser.
Worked example
Validate an array
Confirm a JSON array is syntactically valid.
Reading the result
The validation result appears in the output box and can be copied straight out. Nothing you paste leaves your browser.
Limitations and assumptions
Results depend entirely on the figures you enter and are rounded for display. They are for general information and education, not professional advice.