J2S
JSON to SQL
Build CREATE TABLE and INSERTs from JSON.
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How to use JSON to SQL
Build CREATE TABLE and INSERTs from JSON.
- Paste an array of JSON objects into the Your text field.
- Type the table name you want to create.
- Press Run to get the CREATE TABLE statement plus one INSERT per record.
When you actually reach for this
- You have JSON records and want to insert them into a relational table as INSERT statements.
- You are importing an API response into a database without writing the DDL by hand.
Where this tool stops being accurate
- Arrays and nested objects map poorly to columns; they are usually serialized to text or require a separate child table.
- Auto type detection can mislabel a mixed column as text; review the inferred schema before loading.
Frequently asked questions
What does JSON to SQL do?
Build CREATE TABLE and INSERTs from JSON.
How do I handle a JSON array inside a record?
Either store it as a TEXT/JSON column in Postgres or MySQL 8+, or normalize it into a child table with a foreign key. This tool serializes it to a string by default.
My INSERTs have wrong types — what now?
Adjust the generated CREATE TABLE to the correct types (keep IDs and codes as TEXT) and re-run, or cast during load.