JSON to SQL Converter - Generate SQL from JSON Online
Convert JSON data to SQL CREATE TABLE + INSERT statements. Supports MySQL, PostgreSQL, SQLite.
JSON to SQL Features
Auto Type Inference
Smart detection of VARCHAR, INTEGER, BOOLEAN, etc.
Multi-Dialect
MySQL, PostgreSQL, SQLite with appropriate types.
CREATE TABLE + INSERT
Complete schema and data migration scripts.
Client-Side Privacy
All processing in your browser.
No Signup
Free, no registration needed.
Instant Conversion
Generate SQL in milliseconds.
Common Use Cases
Database Migration
Migrate JSON data to relational databases.
API to Database
Convert API responses to database schemas.
Mock Data Seeding
Generate seed SQL from mock JSON data.
Schema Generation
Auto-generate table schemas from data samples.
JSON to SQL FAQ
How are column types determined?
The tool examines values: strings→VARCHAR, numbers→INTEGER/NUMERIC, booleans→BOOLEAN, objects→JSON, arrays→JSON, null→nullable variant.
Can I change the table name?
Yes, use the Table Name input to customize. Default is "my_table".
What if my JSON has nested objects?
Nested objects and arrays are stored as JSON/JSONB columns, preserving the structure.
Why do types differ between dialects?
Each database has different type systems. PostgreSQL uses JSONB, MySQL uses JSON, SQLite uses TEXT for best compatibility.
Does it handle nullable fields?
Yes, fields with null values are marked nullable. Columns where all values are non-null use NOT NULL.