⇄ Converters

JSON to SQL Table Generator

Generate CREATE TABLE scaffolding from JSON objects with nested structures and arrays.

Nested object support Quick schema drafts Multiple dialects

How the JSON to SQL Table Generator Works

The ByteKiln JSON to SQL generator reads a JSON object, infers appropriate SQL column types from the value shapes, and outputs a CREATE TABLE scaffold for your chosen database dialect. Everything runs in your browser.

How column types are inferred

String values become VARCHAR or TEXT. Whole numbers become INT. Decimal numbers become FLOAT. Booleans become BIT or BOOLEAN. ISO date strings are mapped to DATETIME or TIMESTAMP based on the selected dialect.

Nested objects

Nested JSON objects are extracted into separate CREATE TABLE statements. A foreign key column (e.g. parent_id) is suggested to link the child table back to its parent — review and adjust relationships as needed.

Using the output

The generated schema is a draft scaffold — a starting point, not a production-ready script. Add appropriate column widths, indexes, constraints, and foreign key enforcement before running against a real database.

Read the full guide

FAQ

Short answers for the things developers usually ask before trusting a tool.

Which SQL dialects does the ByteKiln JSON to SQL tool support?

The tool generates CREATE TABLE statements for SQL Server (T-SQL), MySQL, and PostgreSQL. Dialect selection changes the data type mapping, quoting style, and constraint syntax used in the output.

How does the tool infer column types from JSON?

String values become VARCHAR or TEXT depending on the dialect. Numbers with decimals become FLOAT or DECIMAL. Integers become INT or BIGINT. Booleans become BIT or BOOLEAN. ISO date strings are mapped to DATETIME or TIMESTAMP.

What happens with nested JSON objects?

Nested objects are extracted into separate CREATE TABLE statements with a suggested foreign key column linking back to the parent table. You should review and adjust these relationships before using in production.

Is the generated schema ready for production?

It is a draft scaffold. Use it to quickly stub out your schema, then review column sizes, add indexes, and normalize the structure as needed for your workload.

Is my JSON sent to a server?

No. The ByteKiln JSON to SQL generator runs entirely in your browser. Your data is processed locally and never transmitted or stored.

Related tools

Useful follow-ups when one conversion usually turns into three more.

converters