VibeGear
JSON & data

JSON Schema validator

Validate any JSON against any JSON Schema, live.

Install for Chrome →All features

Tools → Inspect → JSON Schema validate · 7-day free trial · Premium $9.99 / yr

Try it now·runs locally · nothing uploaded
JSON document
JSON Schema

⛔ 1 error

  • schema / Schema is not valid: no schema with key or ref "https://json-schema.org/draft/2020-12/schema"
★ Premium

Built for the things AI can’t fake

This tool runs free, right here. The extension adds three things a web widget can’t:

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★ Flagship

Playground

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JS / TS scratchpad — sandboxed and instrumented.

Paste real code, hit Run. Console + network monitor + watch expressions all in one panel.

  • ·Real ES modules · top-level await
  • ·URL imports — esm.sh & friends
  • ·Live fetch monitor (every call)
  • ·Watch expressions in your scope
  • ·10s sandbox timeout · zero CORS pain

HTTP client

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Postman-style request runner.

Save collections, share variables, hit any API. Includes GraphQL with introspection, OpenAPI / cURL import.

  • ·Bearer / Basic / API-key auth
  • ·GraphQL · introspection
  • ·OpenAPI 3.x · cURL import
  • ·Copy as fetch / axios / Python

Realtime (WS + SSE)

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Stream-protocol tester — what Postman doesn’t do well.

WebSocket + Server-Sent Events with custom auth headers, auto-reconnect, JSON pretty-print.

  • ·wss:// + ws:// + subprotocols
  • ·SSE via fetch — Authorization works
  • ·Auto-reconnect with backoff
  • ·Send composer · ⌘ + Enter

What it does

Validate that a JSON document matches a JSON Schema — useful when you’re building or consuming an API and want to catch shape mismatches before runtime.

Powered by ajv with ajv-formats, so common string formats (email, uri, uuid, date-time, ipv4) are recognized out of the box.

Why use VibeGear's json schema validator

How to use it

  1. 1Tools → Inspect → JSON Schema validate.
  2. 2Paste your JSON document on the left.
  3. 3Paste your schema on the right — or paste a URL into the bar above and click Load.
  4. 4Errors appear in the bottom bar with paths.

Related tools

JSON → JSON Schema

Derive a Draft 2020-12 schema from a JSON sample.

JSON validator

Validate JSON syntax with line-precise errors, instantly.

★ Premium

One install. Every tool above.

7 days free, then VibeGear Premium is $9.99 / €9.99 per year. Everything runs locally.

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