SQL DDL to JSON Schema Converter
Convert SQL CREATE TABLE statements into Draft 2020-12 JSON Schema specifications.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use SQL DDL to JSON Schema Converter
Paste your SQL DDL statement into the input workspace.
Inspect the generated Draft 2020-12 JSON Schema with mapped types and required fields.
Copy the JSON schema or download schema.json directly.
Frequently Asked Questions
Which SQL dialects are supported?
Standard PostgreSQL, MySQL, SQLite, and MariaDB CREATE TABLE syntax are fully supported.
Are NOT NULL constraints preserved?
Yes, columns declared with NOT NULL are added to the JSON Schema `required` array.
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