SQL Fiddle
ExtendsClass SQL Online
OnlineGDB
Judge0 IDE
JDoodle
Sphere Engine
replit
Online compiler for many languages, including MySQL

MTG Studio
Free MTG Commander deck builder, mana analysis, combo finder and opening hand tests.

Which is more popular?
Based on our record, Rextester seems to be more popular. It has been mentioned 7 times since March 2021.
Website, pricing, platforms and company facts side by side.
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Rextester
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| Website | insurance.rextester.com | deckcipher.com |
| Pricing | — | |
| Listed in |
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Rextester and DeckCipher. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.

It supports around 30 languages including Java, but it is more popular among C# users. Rextester started as a Regular Expression Tester, later grew to be an online IDE.
We have no reviews of DeckCipher yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.

My Professor has not provided any resources or material to help complete this project, I have tried to problem solve, use the internet, even chatgpt. (I can send the code that it gave me in comments if needed, but ) I need help... Source: over 3 years ago
Does it really do that? (I've just tried in rextester.com, it complains about declared but unused variables.). Source: almost 4 years ago
(A quick survey of some of the languages at rextester.com showed that they are usually counted from 1. I'd suggest doing the same would be least surprising.). Source: over 4 years ago
Tracking DeckCipher since Oct 2026.
When comparing Rextester and DeckCipher, 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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MTG Studio is Magic: the Gathering deck and collection builder for Windows
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Online SQL playground for testing and sharing SQL snippets. SQLite, MySQL and PostgreSQL.
Compare ExtendsClass SQL Online to Rextester or DeckCipher:

OnlineGDB.com is an online compiler and debugger tool for C/C++.
Compare OnlineGDB to Rextester or DeckCipher:


JDoodle is a free online compiler app that is serving programming communities to compile and run programs from mobile devices.
Compare JDoodle to Rextester or DeckCipher: