Generate Data
Faker
DataConstruct
Beeceptor
Fake Data
ExtendsClass JSON Generator
Smock-it
A realistic data generator to test your app

Anki
Quizlet
Knowt
AI Flash.Cards
Brainscape
FlashcardX
Cram
Paste anything. Learn everything. AI generates flashcards in seconds.
Which is more popular?
Based on our record, Mockaroo seems to be more popular. It has been mentioned 27 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | mockaroo.com | deckstudy.com |
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What each product offers, as listed by its team.

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Best Free Sample Data Generator - Mockaroo.com
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Recommendations tracked on public social media and blogs since March 2021.

If you give it the rules to generate something, why can't it generate it? That's what something like Mockaroo[0] does. It's just more formal. That's pretty much what LLM training does, extracting patterns from a huge corpus of text. Then... - Source: Hacker News / over 1 year ago
A quick way to test this out is to use a tool like Mockaroo to generate some test data and then have a Glue Crawler analyse the data in S3 and create the required data catalog entries. - Source: dev.to / over 2 years ago
Mockaroo — Mockaroo lets you generate realistic test data in CSV, JSON, SQL, and Excel formats. You can also create mocks for back-end API. - Source: dev.to / over 2 years ago
Tracking DeckStudy since Mar 2026.
When comparing Mockaroo and DeckStudy, you can also consider the following products.

GenerateData.com: free, GNU-licensed, random custom data generator for testing software
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Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
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Faker is a PHP library that generates fake data for you
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Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
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An app that uses AI to turn your notes into review quizzes.
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