Free SQL to JSON Converter
for developers.
Convert simple SQL SELECT queries into JSON instantly in your browser. Great for mocking API responses, debugging column output and turning SQL fields into JSON structure fast.
Paste your SQL query
Generated JSON
How it works
- Reads simple SQL SELECT queries
- Extracts column names and aliases
- Generates mock JSON keys automatically
- Useful for API mocks, docs and quick prototyping
- Runs locally in your browser
Current limits
- This version is built for simple SELECT queries
- It does not execute SQL against a real database
- It generates mock JSON structure, not real result rows
- Complex nested SQL may not parse correctly
Privacy
- Your SQL stays in the browser
- No upload, no signup, no server processing
Free online SQL to JSON converter
This tool converts simple SQL SELECT statements into mock JSON output using the selected columns from your query. It is useful when you want to sketch API responses, document a payload shape, or quickly inspect what a SQL result could look like in JSON format.
If your query uses aliases such as AS firstName, the converter will use those aliases as JSON keys. That makes it helpful for backend developers, frontend developers and anyone mapping SQL output into application objects.
This version is intentionally lightweight and fast. It focuses on common developer workflows instead of trying to fully parse every SQL dialect and edge case.
Example
SELECT id, first_name AS firstName, email FROM users;This produces a mock JSON object with keys like id, firstName and email.
Why convert SQL to JSON?
SQL and JSON often meet in modern applications. A backend query may feed an API response, a frontend mock, or a test fixture. Converting SQL column selections into JSON structure makes it easier to prototype, communicate response shapes and move faster during development.
It is especially useful when working across SQL databases and JavaScript or TypeScript applications.
FAQ
Does this run real SQL?
No. This version reads a simple SELECT query and generates mock JSON structure based on the selected columns.
Does it support aliases?
Yes. If you use aliases like AS firstName, the alias becomes the JSON key.
Does it support complex SQL?
It supports many simple SELECT cases, but very complex nested queries and edge cases may not parse correctly in this lightweight version.
Is this SQL to JSON converter safe?
Yes. Everything runs locally in your browser and your query is not uploaded.
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