
regular expressions 101
RegExr
LWN.net
Devhints
GitHub
GitLab
BitBucket
Match command-line arguments to their help.
SQL Fiddle
ExtendsClass SQL Online
DB Fiddle
V (programming language)
Online SQL Editor
db<>fiddle
CodePen
Online compiler for many languages, including MySQL

Which is more popular?
Based on our record, explainshell seems to be a lot more popular than Rextester. While we know about 115 links to explainshell, we've tracked only 7 mentions of Rextester.
Website, pricing, platforms and company facts side by side.
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What each product offers, as listed by its team.

Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
No analysis of Rextester yet.
How often each product is chosen within a category, 0–100% relative to the other.

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

We have no reviews of explainshell yet. Be the first one to post
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.
Recommendations tracked on public social media and blogs since March 2021.

The obvious comparison is explainshell.com, which is great but is a web service — you paste your command into someone else's server. For a tool whose entire job is to look at commands you're nervous about (often with tokens, hostnames,... - Source: dev.to / 30 days ago
What it is: explainshell takes a shell command and annotates each flag with the relevant chunk of the man page. - Source: dev.to / about 2 months ago
There is https://explainshell.com/ not in terminal but should do the trick. - Source: Hacker News / 9 months ago
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: over 3 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
When comparing explainshell and Rextester, you can also consider the following products.

Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.
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A tool for easy online testing and sharing of database problems and their solutions.
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RegExr.com is an online tool to learn, build, and test Regular Expressions.
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Online SQL playground for testing and sharing SQL snippets. SQLite, MySQL and PostgreSQL.
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LWN.net aims to be the premier news and information source for the free software community.
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An online tool for testing, sharing and collaborating on SQL snippets
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