JSON ↔ SQL Converter
Convert a JSON array to CREATE TABLE + INSERT statements, or parse INSERT statements back into JSON. Runs entirely in your browser.
How to use:
- Paste a JSON array of objects or SQL INSERT statements
- Choose the conversion direction (JSON → SQL or SQL → JSON)
- Output updates live as you type — or press Ctrl+Enter to convert on demand
- Use ⇄ to feed the output back as input for the other direction
- Copy the output for use in your database
JSON Input 140 chars · 4 lines
SQL Output
Output will appear here.
About this tool
JSON ↔ SQL Converter is a free online tool that turns a JSON array of objects into CREATE TABLE and INSERT statements, and parses SQL INSERT statements back into JSON. Useful for seeding test databases, moving fixtures between formats, or generating quick schema skeletons.
- Directions
- JSON → SQL (CREATE TABLE + INSERTs) and SQL → JSON
- Input
- JSON array of objects (keys may vary per row — the union is used), or SQL INSERT statements
- Output
- SQL DDL/DML statements, or a JSON array
- Round-trip
- Use ⇄ to feed converted output straight back as the other direction's input
- Signup
- Not required
- Processing
- Entirely in your browser — pasted data is never uploaded
- Difference
- Bidirectional with one-click round-trip — most converters only go JSON to SQL, never back
- Price
- Free, no usage limits
Limitations
- Nested objects and arrays inside a record are serialized as JSON strings in the SQL output
- Column names/types are inferred from the union of JSON keys across all rows — review the generated CREATE TABLE before running it
- Very large inputs are limited by available browser memory
JSON ↔ SQL — FAQ
Is the JSON ↔ SQL free?
Yes. The JSON ↔ SQL is completely free with no signup and no usage limits, like all SqlInt mini tools.
What JSON shape does the converter accept?
A non-empty JSON array of objects. Columns come from the union of keys across all rows, so keys that only appear later are not dropped.
What happens to nested objects?
Nested objects and arrays are serialized as JSON strings in the SQL output — review the generated CREATE TABLE before running it.
Does my data leave my browser?
No. Every mini tool processes data locally in your browser — pasted text and uploaded files never leave your device.
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