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JSON Formatter & Validator

Pretty-print, minify, sort, or validate JSON. Pinpoints syntax errors with line and column.

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Frequently asked

How large can the input text for JSON Formatter & Validator be?
There is no hard limit. JSON Formatter & Validator can happily handle pastes in the tens of megabytes, though extremely large inputs can slow the browser tab. For gigabyte-scale files, split them first.
Does JSON Formatter & Validator store or log what I process?
No logs, no history, no database. The content you paste into JSON Formatter & Validator exists only in memory for as long as the tab is open.
How much does JSON Formatter & Validator cost?
Nothing. JSON Formatter & Validator is free and has no signup, no rate limit, no watermark, and no paywalled "pro" tier. You open the page and start working.
Does JSON Formatter & Validator keep a history of previous runs?
No. Each visit starts clean. If you want to save a result, copy it out or use the save-to-file option where available.

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