UUID Studio

UUID Studio

JSON Validator

Check whether text is valid JSON.

  • đź”’ No data stored or uploaded
  • ⚡ 100% client-side
  • 🆓 Free, no account
Click Convert when ready

Override only when Auto cannot parse your paste. Changing this loads a matching sample into Input — click Convert to run. Use Load sample to cycle every format example.

All conversions

Read-only representations of the same 16 bytes. Every textual form is listed here, not in “Prefer format”.

Paste two values: if both sides are valid JSON, a structural diff appears; otherwise UUID / bytes are compared when both decode to the same format.

A
B

Create or edit JSON here (syntax colors), then format, validate, or convert - same as MongoDB $binary UUID blobs on the Convert tab once detected.

New document

Hash, HMAC, AES-GCM/CBC + RSA-OAEP, codecs, JWT decoding, UUID v4, and secure random - all client-side. JWTs use Base64URL (three segments), not a single MIME Base64 block - use Decode JWT below, not raw Base64 decode.

Examples

  • Valid document 
    {"status":"ok"}

About JSON Validator

A single missing comma or stray trailing bracket is enough to break a JSON.parse call somewhere downstream - usually with a cryptic error that doesn't say where the problem actually is.

This tool runs a strict parse and reports a human-readable error with position information, so you can jump straight to the offending character instead of eyeballing the whole document. It checks syntax only - not JSON Schema or OpenAPI constraints, which is what the Schema Validator is for.

FAQ

Does it validate JSON Schema?
This tool checks syntax only, not JSON Schema or OpenAPI rules.