JSON to PostgreSQL Converter
Generate PostgreSQL-compatible SQL from JSON data. This tool automatically infers PostgreSQL-specific types like JSONB, UUID, TIMESTAMP, and DOUBLE PRECISION from your JSON values.
JSON to SQL Converter
Convert JSON arrays to SQL CREATE TABLE and INSERT statements. Supports PostgreSQL, MySQL, and SQLite with automatic type inference.
About JSON to SQL Conversion
- Automatically infers SQL column types from JSON values — integers, floats, booleans, dates, UUIDs, and text.
- Supports PostgreSQL, MySQL, and SQLite with dialect-specific syntax (quoting, types, booleans).
- Generates CREATE TABLE with NOT NULL constraints and INSERT statements with proper escaping.
- Batch INSERT mode combines all rows into a single statement for faster bulk loading.
- Nested objects and arrays are serialized as JSON/JSONB (PostgreSQL) or TEXT (SQLite).
- Everything runs in your browser — no data is sent over the network.
Why convert JSON to PostgreSQL?
PostgreSQL is the most popular open-source relational database, and developers frequently need to seed tables from JSON API responses, configuration files, or test fixtures. Manually writing CREATE TABLE and INSERT statements is tedious and error-prone. This tool automates the process with proper PostgreSQL syntax, quoting, and type mapping — including advanced types like JSONB for nested objects and UUID for identifier strings.
PostgreSQL type inference
The converter detects PostgreSQL-specific types automatically: integers and bigints for numeric values, DOUBLE PRECISION for floats, BOOLEAN for true/false, DATE and TIMESTAMP for date strings, UUID for RFC 4122 identifiers, JSONB for nested objects and arrays, and VARCHAR(n) or TEXT for strings based on length. NULL values are handled with proper nullable column definitions.
Frequently Asked Questions
Does the tool generate JSONB columns for nested objects?
Yes. When a JSON field contains an object or array value, the tool infers the JSONB type for PostgreSQL. The nested data is serialized as a JSON string in the INSERT statement.
Can I use the output directly in psql or pgAdmin?
Yes. The generated SQL uses standard PostgreSQL syntax with double-quoted identifiers and proper type names. You can copy it directly into psql, pgAdmin, DBeaver, or any PostgreSQL client.
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