JSON Schema validator
Paste a JSON document and a schema to validate it — everything runs in your browser.
Tool processing runs in your browser — your pastes/files are not uploaded to our servers for processing.Details
Quick answer
TryDevSnip checks your JSON against a Draft-07 subset (type, required, enum, pattern, min/max) locally. No upload.
Security note. Do not paste production secrets into any webpage if shared devices or extensions are in your threat model.Processing stays in your browser — inputs are not uploaded to our servers for processing.
Embed this tool
Paste this iframe on your site. Includes a backlink to JSON Schema Validator. Opens chrome-less with ?embed=1.
Frequently asked questions
Which JSON Schema features are supported?
Type checks (string, number, integer, boolean, null, object, array), required, properties, items, enum, minLength, maxLength, minimum, maximum, and pattern. $ref and advanced combinators (allOf/anyOf/oneOf) are not yet handled.
Does this support $ref?
Not yet. Inline definitions are validated. For complex schemas with $ref, use a dedicated offline validator like ajv.
Is my JSON or schema uploaded?
No. TryDevSnip validates entirely in your browser. Neither the document nor the schema is uploaded to our servers.
What does "integer" mean in JSON Schema?
A JSON number without a fractional part. JSON itself has no integer type — the schema enforces the constraint.