Format / validate / minify
Paste JSON to begin
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Privacy: JSON.parse / stringify run in your tab. We do not receive your payloads. Prefer this dedicated page when you want a full-screen editor; Developer Utilities also includes a smaller JSON helper.
Format and validate JSON without sending it online
API responses, config files, and webhook payloads often need a quick pretty-print or a syntax check. Paste JSON here to format, minify, or validate — locally.
If you need Base64, UUID, or SHA-256 alongside JSON, see Developer Utilities.
Frequently asked questions
Is my JSON uploaded?
No. Parsing is 100% client-side.
Why a dedicated page vs Developer Utilities?
A larger editor and clearer format/minify/validate actions. Dev Utilities still has a compact JSON tool.
Does it sort keys?
No — key order from JSON.parse is preserved as the engine allows when stringifying objects.
Can it fix invalid JSON?
It reports the parser error; it does not auto-repair trailing commas or comments.