DUMMY DATABASE

What it does

Generate dummy data, build relational databases with PK/FK, simulate event sequences, and export to CSV, SQL, or ERD. Customize data types, outliers, nulls, and repeats. Built-in PostgreSQL editor. Free up to 10,000 records per table.

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  SQL playground2021 · ▲156

  Free private sample PostgreSQL databases

• DT
  DDL to Data – Generate realistic test data from SQL schemasJan 2026 · ▲55

  I built DDL to Data after repeatedly pushing back on "just use production data and mask it" requests. Teams needed populated databases for testing, but pulling prod meant security reviews, PII scrubbing, and DevOps tickets. Hand-written seed scripts were the alternative slow, fragile, and out of sync the moment schemas changed. Paste your CREATE TABLE statements, get realistic test data back. It parses your schema, preserves foreign key relationships, and generates data that looks real, emails look like emails, timestamps are reasonable, uniqueness constraints are honored. No setup, no…

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  SQL Database Schema Generator2024 · ▲133

  Generate a 100% free database schema for your project

• IO
  I open-sourced the in-memory PostgreSQL I built at work for E2E tests2024 · github.com · ▲379
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  Outerbase2023 · ▲298

  The interface for your database

• GT
  Generate test data for your database tables2013 · databasetestdata.com · ▲57

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• IS
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• KT
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  Dev tools · 2025 · github.com

• IW
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  Life & fun · 2025 · visualrambling.space

• TC
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  For HTML Day 2025 [1], I made a web service that displays the current sky at your approximate location as a CSS gradient. Colours are simulated on-demand using atmospheric absorption and scattering coefficients. Updates every minute, without the use of client-side JavaScript. Source code and additional information is available on GitHub: https://github.com/dnlzro/horizon [1] https://html.energy/html-day/2025/index.html

  Dev tools · 2025 · sky.dlazaro.ca