Does this validate JSON Schema?
No. This first version validates JSON syntax only. JSON Schema validation is outside the initial release.
JSON Formatter and Validator
Format, beautify, pretty print, and validate JSON in your browser.
Format and validate JSON
Paste JSON, choose indentation, and format it locally in this browser.
JSON input is processed only in this page session.
Formatted output
Formatted JSON will appear here.How to format JSON
- Paste JSON into the input area.
- Choose 2 spaces, 4 spaces, or tabs for indentation.
- Run Format JSON to validate and pretty print the result.
- Copy the formatted output when it is ready.
Example input and output
Compact JSON like this:
{"name":"Ada","active":true}Becomes readable, indented JSON after formatting.
Validation and privacy
Invalid JSON shows a clear syntax error with line and column when the browser provides enough position detail. The tool checks syntax before formatting, so broken JSON never produces a misleading output.
This tool does not use remote validation, API routes, analytics payloads with user data, or persistent storage for your JSON.
Frequently asked questions
Where is my JSON processed?
Formatting and validation run in your browser. Input and formatted output are not sent to a server, saved to localStorage, or added to the page URL.
Can I change the indentation?
Yes. Choose 2 spaces, 4 spaces, or tabs before formatting the JSON.
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