Sylvaera / Schema to Dataset
SQL SCHEMA · FOREIGN KEYS · CONSTRAINTS

Free Schema to Dataset
Online

Paste any SQL CREATE TABLE statement and get a realistic fully populated dataset instantly. Understands foreign keys constraints and relationships across multiple tables. Export as JSON CSV or Excel. Free no sign-up.

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Key features

Built for real workflows

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Foreign Key Support
Generates data where child rows reference valid parent IDs, maintaining full referential integrity.
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Respects Constraints
Honours NOT NULL, UNIQUE, CHECK constraints and data type ranges automatically.
🗃️
Multiple Tables
Paste multiple CREATE TABLE statements and get consistent, relationally valid data across all tables at once.
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3 Export Formats
Download generated data as JSON, CSV or Excel (.xlsx) — ready to import directly into your database.
How it works

Three steps, instant results

1
Upload or paste your data — supports CSV, JSON and plain text. Paste directly or upload a file from your computer.
2
Configure your options — select strategies, output format and any custom preferences from the clean interface.
3
Download your results — get processed data as CSV, JSON or Excel instantly. No waiting, no email required.
FAQ

Common questions

How do I generate test data from a SQL schema for free?

Paste your CREATE TABLE SQL into sylvaera.com/app Schema to Dataset tool and get realistic test data instantly. Free, no sign-up.

Does it respect foreign key relationships?

Yes. Child table rows reference valid IDs from parent tables, maintaining full referential integrity across all tables.

Which SQL dialects are supported?

PostgreSQL, MySQL, SQLite and Microsoft T-SQL CREATE TABLE syntax are all supported.

Is this tool completely free?

Yes. No sign-up, no credit card, no usage limits for standard datasets. 100% free. All 7 Sylvaera tools are free.

Is my data safe?

Sylvaera does not store any uploaded data. All processing happens in-memory and is discarded immediately after your session ends.

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