HackerRank
Real Dev
Daily Coding Problem
CodinGame
Frontloops
Codewars
Code Racer
No nonsense, real world programming challenges

JSON Generator
Dadroit JSON Viewer
Mockaroo
Insects API
Sheety
Sheetsu
Simple Scraper
Generate realistic random JSON data through a simple and intuitive GUI.

Which is more popular?
Based on our record, hackattic seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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hackattic
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| Website | hackattic.com | mockturtle.net |
| Company | — | 2020 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of hackattic yet.
Build your custom JSON structure through our easy-to-use GUI or import an existing JSON schema. Then, sit back and let Mock Turtle generate thousands of random data based on your structure. It generates the data in real time as you build your tree structure. Plus, it's 100% free!
What each product offers, as listed by its team.

Possible disadvantages
Walkthroughs and reviews on video.
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Free Nested JSON Mock Data Generator - MockTurtle.net
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using hackattic and MockTurtle.net. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

I am aware of few of the resources which I've listed down below, will appreciate if you guys can share bit more. - https://hackattic.com/ : Interesting programming Problems. - Source: Hacker News / over 3 years ago
Also check out https://hackattic.com/ it has some really fun problems. - Source: Hacker News / about 4 years ago
What sort of programming would you like to do? Any real world challenges you are looking to solve? For practice “challenges” I really like https://hackattic.com/. Source: over 5 years ago
Tracking MockTurtle.net since Oct 2022.
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A realistic data generator to test your app
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