🧾 Free · private · in-browser
Free JSON formatter, validator & minifier
Pretty-print, validate, and minify JSON payloads in your browser.
Read dense webhook payloads in a glance
Webhook bodies arrive minified and unreadable. Paste one here to pretty-print it with clean indentation, or minify a formatted payload back down for a request body. Validation pinpoints exactly where and why a payload is malformed — the fastest way to fix a body your endpoint keeps rejecting. Everything runs in your browser, so it is safe for real payloads.
Format, minify, validate
- Format — pretty-print with 2/4-space or tab indentation for readability.
- Minify — strip whitespace for a compact request body.
- Validate — confirm the payload is valid JSON and locate the first error.
Captured a raw payload in the Webhook Inspector? Drop it here to read it.
Frequently asked questions
Is my JSON uploaded anywhere?
No. Formatting, validating, and minifying all happen in your browser with the built-in JSON parser. Nothing is sent to a server, so it is safe for sensitive payloads.
What does the validator catch?
It reports the exact position and reason a payload fails to parse — trailing commas, unquoted keys, single quotes, and similar mistakes — so you can fix malformed webhook bodies fast.
Can it handle large payloads?
Yes, within your browser’s memory. It comfortably handles typical webhook and API payloads up to several megabytes.