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JSON Validator & Formatter
Validate, format and minify JSON in your browser with detailed error locations.
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About JSON Validator & Formatter
JSON (JavaScript Object Notation) is a lightweight data-interchange format. This validator parses your JSON locally in the browser, points to the exact position of syntax errors, and lets you pretty-print or minify the output.
Frequently asked questions
Is my JSON sent to a server?
No. Parsing and formatting happens entirely in your browser.
What size of JSON can I paste?
Up to 1 MB is accepted; larger payloads may slow down the browser.
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