JSON Schema Validator
Validate JSON payloads against schema rules interactively. Evaluated locally using the industry-standard Ajv validator engine — your sensitive business data never leaves your device.
How ZeroData protects your privacy
- ✓ No Uploads: Processing happens entirely via client-side JavaScript.
- ✓ No Storage: We do not have a database. We physically cannot save your data.
- ✓ No Tracking: We don't log what you process or track your inputs.
- ✓ Verifiable: Check your DevTools Network tab. You will see 0 outbound requests.
Enterprise-Grade JSON Schema Validation Offline
JSON Schema is a powerful declarative language that enables you to annotate and validate JSON documents. It guarantees the consistency and correctness of API requests, system configurations, and database entries. However, because JSON Schemas can grow highly complex, testing a draft schema against model payloads is difficult without proper validation tooling.
This JSON Schema Validator provides a sleek, side-by-side CodeMirror editing environment to test schemas and payloads simultaneously. Using Ajv, the industry-standard validator for modern Node.js and web applications, we guarantee compliant, high-performance compilation and execution. Best of all, because validation is executed completely inside your browser sandbox, you can test enterprise-level business records without breaching data privacy regulations.
Rich Formatting and Interactive Linting
Writing schema structures is tedious due to deep nesting and strict punctuation requirements. To ease development, our validator offers premium IDE-level features entirely client-side:
- Side-by-Side Dual Editors: Two separate CodeMirror panels equipped with full syntax highlighting, folding, tab indentation, and line numbers.
- Automatic Error Pointer Paths: Highlighting exactly which keys violated constraints using standard JSON paths (e.g.
/dimensions/width) and detailing the breached validator keyword. - Built-in Format Checkers: Comprehensive support for formatting specifications (like UUIDs, email addresses, IP coordinates, and datetime stamps).
- One-Click Beautifiers: Instant local formatting of both JSON data and schemas with a single button click.
Establish Your Local JSON Ecosystem
This validator expands our robust semantic suite of data manipulation utilities. Clean up raw JSON text arrays with our JSON Formatter, or verify general syntax issues instantly with our local JSON Validator. If you're building type-safe modern software, generate interface definitions in seconds using JSON to TypeScript.
How to Use the JSON Schema Validator
- Choose a preset from the dropdown (such as Simple User Profile) or select Empty Editors.
- Paste or compose your JSON data payload in the left pane.
- Paste or compose your JSON Schema specification in the right pane.
- The Ajv validation engine parses both blocks in real-time, displaying a success banner or list of pointer paths for failures.
Common Use Cases
- Validating complex client payload configurations against Draft-07 schemas locally before deploying code shifts.
- Testing API contract formats during frontend-backend integration without sending secure keys or user records online.
- Linting OpenAPI, Swagger, or custom configuration documents securely in an isolated, client-side editor.
- Drafting and testing schema specifications interactively side-by-side using fully equipped CodeMirror panels.
Frequently Asked Questions
How do I validate JSON against a schema?
Paste your raw JSON object in the left editor and your JSON Schema object in the right editor. The tool compiles the schema and runs the validation automatically using client-side JavaScript. If any validation constraints are violated, the specific error paths, keywords, and human-friendly descriptions are rendered instantly.
Which JSON Schema draft versions are supported?
Our validator is powered by Ajv, the fastest and most popular JSON Schema validator in the JavaScript ecosystem. It supports draft-07, draft-2019-09, and draft-2020-12 standards out of the box.
What JSON Schema formats are supported?
We include the ajv-formats plugin, enabling full validation for standard data formats such as: email, uri, ipv4, ipv6, date, date-time, time, uuid, and more. When your schema specifies a format constraints check (e.g. "format": "email"), the validator tests the value accordingly.
Is it safe to validate enterprise data with this tool?
Yes, 100%! Unlike cloud-based validation utilities that transmit your private payloads to a remote backend server for evaluation, ZeroData Tools processes your files and configurations 100% inside your browser session using local client-side Javascript. No data ever leaves your device.