Generate test data objects from a schema defining field names and types. Everything runs locally in your browser — nothing is uploaded.
Generate Apache Avro schemas from a JSON field definition. Configure namespace, record name, and field types — outputs valid Avro schema JSON.
Convert GraphQL schema definitions to JSON Schema format. Bridge the gap between GraphQL and REST tooling ecosystems.
Validate GraphQL schema syntax and structure. Detect missing root types, unknown type references, and common schema issues.
Generate JSON-LD BreadcrumbList structured data from a list of page names and URLs. Add breadcrumb schema to your website for better SEO.
Generate JSON-LD structured data markup for Article, Product, FAQ, LocalBusiness, Recipe, and Event schema types. No signup or account required.
Test Data Generator lets you generate test data objects from a schema defining field names and types. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Generate test data objects from a schema defining field names and types. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Configure your settings below — the output generates instantly.
Yes. After the initial page load, Test Data Generator runs entirely on your device with no internet connection needed. All processing is done locally.
Generate test data objects from a schema defining field names and types. All processing runs locally — no code is sent to any server.
Tools cover JavaScript, CSS, HTML, SQL, Python, JSON, XML, CSV, and more. Check the tool description for specifics.
Yes. Since processing is local, performance depends on your device. Most operations handle large files without issue.
Yes. Formatters use well-known libraries (sql-formatter, Prettier-compatible patterns) and follow widely adopted rules.
Fake Data Generator
Generate fake personal data including names, emails, phone numbers, and addresses. Perfect for testing forms, databases, and application development. Everything runs locally in your browser — nothing is uploaded.
API Mock Data Generator
Generate realistic mock JSON data from a schema description. Ideal for rapid API prototyping and frontend development without a backend.