Want to convert API response JSON to SQL file?
Try Withdata Data File Converter, a JSON to SQL converter for Windows, Mac, and Linux, Convert JSON from RESTful API to SQL, Easy and Fast.
- Can run in GUI mode, Step by Step, just a few mouse clicks.
- Can run in Command line, for Scheduled Tasks and Streams.
Download Withdata DataFileConverter 
Convert API response JSON to SQL
Click “Start a New Convert” at task dialog.
then show the wizard.
Select source/target file type.
1. Input the RESTful API URL, and download to JSON file.
2. Open the saved JSON file.
3. Config target SQL file.
4. Set rows options.
5. Convert API response JSON to SQL.
See SQL file
Convert API response JSON to SQL in command line
Save “JSON to SQL” session, then you can:
- Convert API response JSON to SQL in Windows command line.
- Convert API response JSON to SQL in Linux command line.
- Convert API response JSON to SQL in macOS command line.
Set scheduled tasks for converting API response JSON to SQL
You can schedule and automate this converting task by:
- Save session and create .bat (Windows) or .sh (Linux/macOS) file for “API response JSON to SQL” conversion.
- Set scheduled task for “API response JSON to SQL” conversion.
FAQ
More about Withdata DataFileConverter – API JSON to SQL converter
Download Withdata DataFileConverter
JSON → SQL reference
Type mapping
| Value kind | in JSON | in SQL |
|---|---|---|
| Int | 1234 (number) | INT |
| Bigint | 9007199254740993 | BIGINT |
| Decimal | 1234.56 (number) | DECIMAL(p,s) |
| Float | 1.234e10 (number) | DOUBLE PRECISION |
| Text | "text" (string) | VARCHAR(n) |
| Long text | "multi-line\ntext" (escaped newline inside a string) | TEXT / CLOB |
| Date | "2026-09-18" (string) | DATE |
| Datetime | "2026-09-18T14:30:00Z" (string) | TIMESTAMP |
| Binary | "base64:..." (string) | BLOB / BYTEA |
| Boolean | true / false (boolean) | BOOLEAN / SMALLINT |
| JSON | nested object or array, kept as structure | JSON / TEXT |
Dialect differences
Both JSON and SQL are file formats, so what differs below is how each one chooses to represent a value.
| Property | in JSON | in SQL |
|---|---|---|
| identifiers | Double quotes; backslash escapes | Two competing conventions: single-quoted literals and diale... |
| dates | No date type: dates arrive as strings and the reader must p... | Depends on the dialect: DATE literals, TO_DATE(), or plain ... |
| binary | Not supported natively - base64 inside a string | Dialect-specific: X-quoted literal, 0x hex, or decode() |
| separator | Braces and commas | Statement terminators (;) |
| encoding | UTF-8 by definition | No declaration |
| typing | string, number, boolean, null, object, array - no date type | Types belong to the target database, and they differ betwee... |
| shape | Nested objects and arrays | Statements; a dump usually means CREATE TABLE plus INSERT rows |
| ceiling | Whole document is usually parsed into memory | No formal limit, but a single INSERT statement has to fit i... |
Data File Converter without the manual work
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