Which SQL dialects are supported?

PostgreSQL, MySQL, and SQLite dialects are supported, with appropriate quoting and syntax differences.

How are missing or optional keys handled?

The converter scans every record in your JSON array to identify all unique columns and inserts NULL for missing properties.

JSON to SQL

Free online JSON to SQL Converter. Generate SQL INSERT statements and CREATE TABLE DDL queries from JSON arrays. Supports PostgreSQL, MySQL, and SQLite dialects.

100% Private (In-Browser)Instant Web Worker SpeedZero Server Upload

JSON to SQL by Privacy-First Toolbox is a 100% free, client-side browser utility. It processes your files locally on your computer or smartphone using HTML5 and Web Workers—zero bytes of your files or data are ever uploaded to any external server.

Options

Table Name

Statements

Dialect

JSON Array

SQL Output

Key Features

Automatic column type inference (INTEGER, NUMERIC, VARCHAR, BOOLEAN, JSONB)
Batch INSERT statement generation
CREATE TABLE DDL query generation
Multi-dialect support: PostgreSQL, MySQL, and SQLite
Safe SQL value escaping and identifier sanitization

Common Use Cases

Seeding relational databases from API mock responses
Migrating MongoDB or document store exports into PostgreSQL/MySQL
Generating test fixtures and database migrations

Frequently Asked Questions

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