Online visual JSON Schema editor: build and edit JSON Schema documents with a form-based interface. Add properties, set types, mark required fields, support nested objects and arrays. Import existing schemas.
TL;DR: Free online JSON Schema editor for visually building schema structures. Supports property type selection, required field settings, format constraints, and real-time validation. Runs locally with no data leakage.
This tool runs entirely in your browser. Open DevTools → Network panel and search your input — it appears in no request.
FAQ
Completely free, no registration required. Write and validate JSON Schema directly in your browser — all operations run locally.
Yes. You can validate your JSON instance data against the schema, highlighting type, required-field, and format errors to quickly locate issues.
No. Editing and validation run locally in your browser; your data is never sent to any server, ensuring privacy.
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