Is my JSON data uploaded to a server?

No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.

How are nested objects and arrays handled?

They become JSON columns, supported natively by MySQL 5.7 and later. Everything stays in a single CREATE TABLE statement.

Which column types are generated?

Strings map to VARCHAR(255), integers to BIGINT, floats to DOUBLE and booleans to TINYINT(1). Columns are NOT NULL unless the sample value is null, and names are snake_case between backticks.

JSON to MySQL CREATE TABLE Converter

JSON to MySQL CREATE TABLE Converter — Free Online Tool

Generate a MySQL CREATE TABLE statement from sample JSON in your browser. Free, private and offline-friendly: your data never leaves your device.

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Root name

JSON input

MySQL output

Why convert JSON to MySQL?

Turning an API payload into a database table by hand means guessing types and typing a lot of SQL. Paste a sample JSON document above and get a single ready-to-run CREATE TABLE statement in milliseconds. A root array of objects is treated as describing one table row.

How it works

The converter parses your JSON locally and infers one column per key, named in snake_case between backticks: VARCHAR(255) for strings, BIGINT for integers, DOUBLE for floats and TINYINT(1) for booleans. Columns are NOT NULL unless the value is null, and nested objects or arrays become JSON columns (MySQL 5.7+).

Frequently asked questions

Is my JSON data uploaded to a server?: No. The conversion runs entirely in your browser with JavaScript. Nothing is sent over the network, which makes the tool safe for sensitive data.
How are nested objects and arrays handled?: They become JSON columns, supported natively by MySQL 5.7 and later. Everything stays in a single CREATE TABLE statement.
Which column types are generated?: Strings map to VARCHAR(255), integers to BIGINT, floats to DOUBLE and booleans to TINYINT(1). Columns are NOT NULL unless the sample value is null, and names are snake_case between backticks.