The JSON is a review model
The result records selected parsed declarations. It is not a complete database catalog, migration, or reversible dump.
- Input
- SQL
- Dialects
- 4 explicit
- Runtime
- Browser
Convert a narrow CREATE TABLE subset to JSON
Extract tables, ordinary columns, primary-key flags, nullability, and declared foreign keys from supported DDL.
Local processingNo sign-upNever executed
Convert DDL to JSON
Inputs stay in this browser tab. Parser-heavy work uses a tighter 256 KiB safety cap.
Schema JSON
No result is placed in a URL, account, API, or remote log.
What this tool does
Bounded, explicit-dialect processing
DDL varies widely between engines. This converter owns a narrow CREATE TABLE subset and fails visibly on CREATE TABLE AS, unknown definitions, and unsupported constraints.
Unsupported definitions are not guessed
Generated columns, checks, table options, vendor extensions, and unknown parser shapes are rejected when they fall outside the owned subset.
The parser runs locally under byte, statement, AST-node, depth, row, column, diagnostic, and output limits. It never connects to a database or resolves files and URLs.
Questions and answers
Related SQL tools
SQL Schema ComparatorExtract the same narrow schema model from two DDL inputs and compare their tables, columns, and foreign keys.SQL DDL to Mermaid ERDGenerate Mermaid erDiagram text from the narrow CREATE TABLE model without querying a catalog.SQL Syntax ValidatorParse one explicit SQL dialect and report syntax status, statement count, and statement types.