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JSON to SQL Schema — Infer a CREATE TABLE Statement From JSON

Paste JSON data to infer a SQL CREATE TABLE schema — column names and types inferred from your data — a different job from generating INSERT statements for existing data (see JSON to SQL DML) or from JSON Schema (a JSON-native validation spec, not SQL DDL).

How to use JSON to Schema

1. Paste your JSON.
2. Enter the target table name.
3. Review the inferred CREATE TABLE statement.
4. Copy it to set up your table.

Frequently asked questions

How is this different from JSON to SQL DML?

This infers a CREATE TABLE schema (column definitions); JSON to SQL DML generates INSERT statements to populate an existing table with your JSON data — you likely want this one first, then that one.

How is this different from JSON Schema Gen?

JSON Schema Gen produces a JSON Schema document (a JSON-native validation spec); this produces actual SQL DDL syntax for a relational database table — different target formats entirely, despite the similar-sounding names.

What SQL types does it infer?

Standard types (VARCHAR, INTEGER, BOOLEAN, TIMESTAMP) are inferred from your JSON value types, compatible with MySQL, PostgreSQL and SQLite with minor dialect adjustments.

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