SchemaSafe
Validate JSON against your schema — every error with a JSON-pointer path.
SchemaSafe (SchemaSafe) validates a JSON instance against your JSON Schema (draft 2020-12) and returns every error with a JSON-pointer path — type, required, enum, format, additionalProperties. It runs locally with no AI key and no account, starting at $29/month.
Paste a JSON Schema (draft 2020-12) and a JSON instance; get every validation error with a JSON-pointer path — type, required, enum, format, additionalProperties. For backend developers and API teams validating API payloads, config files, and webhook bodies. Deterministic logic, no AI key, no account.
Scan coverage
- Starts at $29/month
- Validates JSON Schema draft 2020-12
- Runs locally: no AI key, no account, no upload
What it looks for
- Schema + instance validation
- JSON-pointer error paths
- Type / required / format checks
- Runs locally, no AI
What errors does SchemaSafe report?
It reports every failure, not just the first: wrong type, missing required fields, bad enum values, wrong format, and stray additionalProperties. Each error carries a JSON-pointer path like /user/address/city so you know exactly where to fix.
Which JSON Schema draft does it use?
It validates against JSON Schema draft 2020-12, the current recommended draft, so $ref, dependentRequired, and modern keywords resolve correctly. Old validators that only know draft-07 silently miss these.
Where does it run, and is my data sent anywhere?
It runs locally in the browser with no AI key and no account, so payloads stay on the user's machine. That matters for API teams validating confidential webhook bodies or config files.
Who actually needs schema validation?
Backend developers and API teams validating request payloads, config files, and webhook bodies before they reach logic. A single undetected bad field is cheaper to catch at the edge than in a production incident.
Where SchemaSafe reaches its limits
It validates against your schema, but a passing validation does not guarantee your data is correct or safe - only that it matches the contract. Review edge cases manually.
Reading your results
What does SchemaSafe do?
SchemaSafe validates a JSON instance against your JSON Schema (draft 2020-12) and returns every error with a JSON-pointer path — type, required, enum, format, and additionalProperties — so you fix at the exact location.
How much does SchemaSafe cost?
Plans start at $29/month (billed $290/year). See the live tool for the current plan before validating production payloads.
Who is SchemaSafe for?
Backend developers and API teams validating request payloads, config files, and webhook bodies. It suits teams that want deterministic validation with no AI dependency.
Which JSON Schema version is supported?
It validates against draft 2020-12, the current recommended draft, so $ref and modern keywords resolve correctly — unlike older validators stuck on draft-07.
Is my data sent to a server?
No. It runs locally in the browser with no AI key and no account, so the JSON you validate stays on your machine, which matters for confidential payloads.
Does it report all errors or just the first?
It reports every error with its JSON-pointer path, so you fix the whole payload in one pass instead of round-tripping on each failure.
What will SchemaSafe miss?
It validates against your schema, but a passing validation does not guarantee your data is correct or safe - only that it matches the contract. Review edge cases manually.
Built by Xingliang Li · LX Micro-SaaS Factory — a one-person, curated set of tight-vertical AI tools. How tools are selected →