Life & fun · alternatives · 2026
24 alternatives to DataMaker21
Test data generator. Make mock data for free.
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. DataMaker21 launched in 2022; newer entries below may have overtaken it.
- 1
Generate custom data & API to build apps in less than 30s
2021 · its alternatives →
- 2GT
2013 · databasetestdata.com · its alternatives →
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Generate Realistic Test Data — Instantly.
Nov 2025 · data-mock-generator.com · its alternatives →
- 5
Free mock data generator with 120+ fields, up to million row
Feb 2026 · 1000freetools.com · its alternatives →
- 6AT
A bunch of developers and myself have created RepliByte - an open-source tool to seed a development database from a production database. Features: - Support data backup and restore for PostgreSQL, MySQL and MongoDB - Replace sensitive data with fake data - Works on large database (> 10GB) (read Design) - Database Subsetting: Scale down a production database to a more reasonable size - Start a local database with the prod data in a single command - On-the-fly data (de)compression (Zlib) - On-the-fly data de/encryption (AES-256) - Fully stateless (no server, no daemon) and lightweight…
2022 · its alternatives →
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Paste real JSON, get 1,000 coherent rows that match it
Jun 2026 · jsondevtools.org · its alternatives →
- 9OS
Hey HN! A few months ago we shared our AI dataset generator as an open source repo, and the response was incredible (https://news.ycombinator.com/item?id=44388093). We got requests from folks who wanted to use it without the hosting overhead, so we created both options: a hosted version (https://www.metabase.com/ai-data-generator for instant use and the source code fully open (https://github.com/metabase/dataset-generator) for anyone who wants to self-host or contribute. Looking forward to seeing how you use it and what you build on top of…
Sep 2025 · metabase.com · its alternatives →
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- 11
Free excel datasets for practice
2025 · expireddomains.com · its alternatives →
- 12
Free fake data generator — 120+ fields, 7 export formats
Jul 2026 · fakedatabase.com · its alternatives →
- 13DT
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…
Jan 2026 · its alternatives →
- 14
Mockdata in 10 seconds. 99¢/ export. JSON / CSV / SQL INSERT
Sep 2025 · mockdata-generator.toolsfor99cents.com · its alternatives →
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- 19
Generate realistic mock data for apps - quick & easy!
2025 · mock-data.com · its alternatives →
- 20
Generate realistic mock data for apps - quick & easy!
2025 · mock-data.com · its alternatives →
- 21
- 22
Dummy data generator for devs, analysts & QA testers
2025 · dummydatabase.com · its alternatives →
- 23
BUT WHY????????????????????????!
Dec 2025 · really-free-qr-code-generator.com · its alternatives →
- 24DM
Hello HN, Today we're sharing with you DataConstruct, a tool to help you generate mock data and the code to consume it. Features: - Exporting data to json, yaml, xml - Generating PostgreSQL, MySQL scripts - Code gen for various languages including but not limited to C++, Rust, Typescript, Java, C#, Go, Dart, Swift, Mojo You can try it out at the link below (no signup or credit card needed), the only limit being up to 1000 rows per generation within the playground. https://www.dataconstruct.io/organizations/playground/schema... If there's languages, databases, data…
2024 · dataconstruct.io · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →