How does SQL to JSON conversion generate realistic mock data?

The engine inspects column names and SQL types (INT, VARCHAR, TIMESTAMP, BOOLEAN, DECIMAL) to produce realistic names, emails, prices, dates, and IDs formatted as valid JSON arrays.

Is my SQL database schema uploaded anywhere?

No. The SQL tokenizer runs 100% inside client-side JavaScript memory. Works completely offline in Airplane Mode.

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Works 100% offline — test in Airplane Mode

Convert SQL DDL to JSON fixtures locally. Zero data leaks.

NETWORK ON

DATABASE & FIXTURES

SQL to JSON: DDL Schema to Mock Data

Parse CREATE TABLE schemas and SQL statements to generate structured JSON fixture arrays and realistic API test mock payloads.

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SQL Schema AST Engine

🔒 100% CLIENT-SIDE

SQL DDL Schema / CREATE TABLE 0 bytes

Generated JSON Mock Array

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⚡ Generate mock data from clipboard on macOS with L2Cache

Copy any SQL table definition from DBeaver, TablePlus, or pgAdmin. Press ⌘⇧V in L2Cache to generate realistic JSON fixtures directly in your paste menu.

🍎 Get L2Cache for Mac

Why Converting SQL DDL to JSON Accelerates API Prototyping

When building full-stack applications, developers often design PostgreSQL or MySQL schemas first. Manually hand-crafting JSON fixtures or seed files for unit tests is tedious and error-prone.

This tool parses the column names and SQL types (e.g. VARCHAR, DECIMAL, BOOLEAN, TIMESTAMP) and generates realistic, valid JSON mock arrays ready for unit tests and frontend mocking.

Frequently Asked Questions

Which SQL dialects are supported?

PostgreSQL, MySQL, SQLite, Oracle, and Microsoft SQL Server DDL syntax are all supported.

Is my database schema private?

Yes. Schema parsing occurs 100% in your browser. Disconnect Wi-Fi or test in Airplane Mode to verify zero network requests.

SQL to JSON: DDL Schema to Mock Data

⚡ Generate mock data from clipboard on macOS with L2Cache

Why Converting SQL DDL to JSON Accelerates API Prototyping

Frequently Asked Questions

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