Paste a JSON document and a JSON Schema to see every validation error with its instance path. Supports draft 2020-12 and draft-07, entirely in your browser.
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The document is valid against the schema.
- Runs entirely in your browser — your data is never sent to a server
- Supports JSON Schema draft 2020-12 and draft-07
- Lists every error with its instance path
How it works
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1
Paste the string, expression, or value you want to inspect.
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2
It's parsed instantly and broken down on screen.
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3
Review the details or matches highlighted for you.
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4
Copy any part of the result you need.
Why use this tool
Every dev utility, one place
Format, convert, encode, decode, and generate — no more juggling ten tabs.
100% private, always
Every tool runs in your browser — your code and data are never sent anywhere.
Works on any device
Runs on Windows, Mac, Linux, iOS, and Android — nothing to install.
Instant results
No queues, no build step — results update as you type.
Built to handle real data
Full Unicode support and RFC-compliant parsing, edge cases included.
Free, always
Free to use, with no rate limits, sign-up, or trial period.
Frequently asked questions
Draft 2020-12 and draft-07. The draft is picked from the \$schema keyword, and 2020-12 is used when it is missing.
Each error shows a JSON Pointer to the failing value in your document, such as /items/2/price. An empty path means the root value.
No. Local references such as #/\$defs/name and #/definitions/name are resolved; remote schemas are not fetched.
No. Validation happens entirely in your browser.
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