JSON to SQL INSERT Statement Generator — Free Online
Generate SQL INSERT statements from JSON data using AI. Works with MySQL, PostgreSQL, and SQLite. Handles arrays, nested objects, and null values. Free, no sign-up.
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JSON to SQL INSERT Statement Generator — Free Online
About JSON to SQL INSERT Statement Generator — Free Online
JSON to SQL INSERT converts JSON objects and arrays into ready-to-run SQL INSERT statements, mapping JSON keys to column names and values to properly escaped SQL literals. Developers use it to seed databases, migrate data between systems, and generate test fixtures without writing repetitive INSERT boilerplate by hand.
JSON to SQL Type Mapping
| JSON Type | Example Value | SQL Type | SQL Output Example |
|---|---|---|---|
| string | "Alice" | VARCHAR / TEXT | 'Alice' |
| number (integer) | 42 | INT / BIGINT | 42 |
| number (float) | 3.14 | DECIMAL / FLOAT | 3.14 |
| boolean | true | BOOLEAN / TINYINT(1) | TRUE or 1 |
| null | null | NULL | NULL |
| array | [1,2,3] | TEXT (serialized) | '[1,2,3]' |
| object | {"k":"v"} | TEXT / JSONB | '{"k":"v"}' |
SQL INSERT Format Comparison
| Feature | Single-row INSERT | Multi-row INSERT | INSERT … SELECT |
|---|---|---|---|
| Syntax | INSERT INTO t (cols) VALUES (row); | INSERT INTO t (cols) VALUES (r1),(r2); | INSERT INTO t SELECT … FROM … |
| SQL standard | SQL-92 | SQL-92 (MySQL/PG/MSSQL 2008+) | SQL-92 |
| Best for | One record, readability | Bulk loading JSON arrays | Transforming existing table data |
| Transaction atomicity | Per statement | Single statement, all-or-none | Single statement |
| Generated by this tool | Yes | Yes (array input) | No |
| Escape handling | Per value | Per value | Depends on source query |
Frequently Asked Questions
How does the JSON to SQL converter handle special characters and SQL injection?
The tool escapes single quotes by doubling them (e.g., O'Brien becomes 'O''Brien') and wraps all string values in single quotes per the SQL standard. This prevents accidental syntax errors and basic injection when pasting into a development or staging database. For production use, always prefer parameterized queries or prepared statements instead of inline INSERT strings.
Can I convert a JSON array of objects into multiple SQL INSERT statements at once?
Yes. When the input is a JSON array, the tool iterates over each object and generates one INSERT statement per element, all targeting the same table with the same column list derived from the first object's keys. If later objects have extra or missing keys, those columns are filled with NULL or omitted depending on the selected output mode.
What SQL dialects does JSON to SQL INSERT support?
The tool generates ANSI SQL that runs on MySQL, PostgreSQL, SQLite, and SQL Server with no changes for basic scalar types. PostgreSQL-specific output uses TRUE/FALSE for booleans and can emit JSONB casts for nested objects; MySQL output uses 1/0 for booleans and backtick-quoted identifiers to avoid reserved-word conflicts.
How are nested JSON objects and arrays handled in the SQL output?
Nested objects and arrays are serialized to their JSON string representation and stored as a quoted text literal (e.g., '{"city":"NYC"}'). This is compatible with PostgreSQL JSONB/JSON columns and MySQL JSON columns. If you need the nested data normalized into a relational structure, you will need to flatten the JSON first or split it into parent/child tables manually.
Does the tool preserve JSON key order as SQL column order?
Column order in the generated INSERT statement follows the key insertion order of the first JSON object, which modern JavaScript engines preserve for non-integer keys per the ECMAScript 2015 spec. If your table was created with a different column order, the explicit column list in the INSERT (e.g., INSERT INTO t (col1, col2) VALUES …) ensures the values are mapped correctly regardless of table definition order.
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