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

SQL Fiddle
DB Fiddle
ExtendsClass SQL Online
sqlize.online
phpize.online
Rextester
db<>fiddle
Free Online SQL Editor

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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Mockaroo
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| Website | mockaroo.com | online-sql-editor.com |
| Pricing | — | |
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What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
Walkthroughs and reviews on video.
Best Free Sample Data Generator - Mockaroo.com
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How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Mockaroo and Online SQL Editor. For example, how are they different and which one is better?
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 Online SQL Editor since Mar 2021.
When comparing Mockaroo and Online SQL Editor, you can also consider the following products.

GenerateData.com: free, GNU-licensed, random custom data generator for testing software
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A tool for easy online testing and sharing of database problems and their solutions.
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Faker is a PHP library that generates fake data for you
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An online tool for testing, sharing and collaborating on SQL snippets
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Online SQL playground for testing and sharing SQL snippets. SQLite, MySQL and PostgreSQL.
Compare ExtendsClass SQL Online to Mockaroo or Online SQL Editor: