JSON
JSON Schema Validator
Validate JSON documents against a JSON Schema (draft-07 / 2019-09 / 2020-12) with precise error paths.
Code generation from strings disallowed for this context
Why use our JSON Schema Validator?
100% private
Everything runs in your browser. Your data never leaves your device — safe for production payloads.
Instant results
No round trips, no rate limits, no login. Format, validate and inspect megabytes of JSON in milliseconds.
Standards-first
Follows RFC 8259 / ECMA-404 exactly. Reports errors with precise line and column diagnostics.
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Strip whitespace and shrink JSON payloads to the smallest possible size for APIs, storage, and network transfer.
OpenJSON Tree Viewer
Explore nested JSON as an interactive tree — expand, collapse, filter and copy JSON paths of any node.
OpenJSON Compare
Side-by-side comparison of two JSON documents with structural highlighting to spot differences instantly.
OpenJSON Diff
Structural diff of two JSON objects or arrays showing added, removed and modified keys with paths.
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