Data Tools
JSON Validator
Paste JSON to validate syntax instantly in your browser. See parse errors with path hints and a preview of valid payloads.
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How to use
- Paste your JSON
- Review valid/invalid status
- Fix errors using the path hint
Next step
- JSON Formatter
Paste JSON to format, validate, and beautify it instantly in your browser. Free online JSON formatter.
- JSON Minifier
Minify JSON by removing whitespace. See byte savings and copy compact output for APIs, logs, or storage—all in your browser.
- JSON Compare
Compare two JSON payloads and see which paths changed, were added, or removed. Structural diff with counts—runs locally in your browser.
Frequently asked questions
Does my JSON leave my device?
No. Validation runs entirely in your browser. Nothing is uploaded.
What does the path mean?
When parsing fails, we estimate a JSON Pointer-style path (e.g. $.items[0].name) near the error position to help you find the mistake.
Does this validate against a JSON Schema?
No. This tool checks syntax only—commas, quotes, brackets—not business rules or schema constraints.