JSON Schema Validator & Lint Inspector
Validate JSON documents against JSON Schema definitions using Ajv. Path-accurate structural error reports.
Batch workspace
Format multiple files locally in one run.
How to use the JSON Schema Validator
Paste code or file
Paste your raw JSON text or upload directly.
Configure options
Choose indentation, dialect, or formatting preferences.
Format & export
Click format, then copy, download, or inspect in tree view.
What is a JSON Schema Validator?
Validate JSON documents against JSON Schema definitions using Ajv. Path-accurate structural error reports. This tool re-indents and organizes code according to standard style conventions while checking for syntax validity. Everything executes 100% inside your browser, guaranteeing zero latency and complete privacy for API keys, user tokens, and confidential database schemas.
Options Explained
| Option | Description |
|---|---|
| Report All Errors | Return all validation errors rather than stopping at the first failure. |
Frequently Asked Questions
What JSON Schema drafts are supported?
JSON Schema Draft-07 and Draft 2020-12 are fully supported via the standard Ajv validation engine.
Can I validate just a Schema without data?
Yes. Providing just a schema object validates its syntax and displays structural summary metadata.
Is my data uploaded when I use the JSON Schema Validator?
No. All processing runs entirely in your browser. Nothing is sent to a server unless you explicitly create a share link.
Does this tool work offline?
Yes. After the first visit, the PWA service worker can serve the page and run the formatter without a network connection.
What is the maximum input size?
Most tools accept up to about 5MB in the editor. Very large inputs are processed preferentially in a Web Worker and may download instead of filling the output pane.
Free Developer Cheat Sheet
Download a handy, printable reference guide for JSON Schema Validator syntax and best practices.
Download Free Cheat Sheet