
SQL Fiddle
DB Fiddle
Online SQL Editor
Rextester
Online SQL playground for testing and sharing SQL snippets. SQLite, MySQL and PostgreSQL.
Generate Data
Faker
DataConstruct
Beeceptor
Fake Data
ExtendsClass JSON Generator
Smock-it
A realistic data generator to test your app

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 | extendsclass.com | mockaroo.com |
| Pricing | — | |
| Company | 2022 | — |
| Listed in |
In their own words, as submitted to SaaSHub.

It is a SQL playground which allows to test SQL online. Run SQL queries for SQLite, MySQL and PostgreSQL databases. Share snippets.
No description of Mockaroo yet.
What each product offers, as listed by its team.

No features have been listed yet.
Possible disadvantages
Walkthroughs and reviews on video.
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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 ExtendsClass SQL Online and Mockaroo. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

Tracking ExtendsClass SQL Online since Oct 2022.
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
When comparing ExtendsClass SQL Online and Mockaroo, you can also consider the following products.

A tool for easy online testing and sharing of database problems and their solutions.
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GenerateData.com: free, GNU-licensed, random custom data generator for testing software
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An online tool for testing, sharing and collaborating on SQL snippets
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Faker is a PHP library that generates fake data for you
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Free Online SQL Editor
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We fake it till you make it!
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