
regular expressions 101
rubular
Expresso
RegEx Generator
Regex Crossword
i Hate Regex
RegexPlanet Ruby
RegExr.com is an online tool to learn, build, and test Regular Expressions.

replit
Coding Assistant
AskCodi
explainshell
CodeConvert
Zzz
Code Companion
Python Tutor is a code visualizer for Python, Java, JavaScript, TypeScript, Ruby, C, and C++...
Which is more popular?
Based on our record, RegExr should be more popular than Python Tutor. It has been mentioned 368 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | regexr.com | pythontutor.com |
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| Company | Startup from the United States | — |
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Python Tutor (PythonTutor.com) - Best Programming Learning Tool EVER!! - Using with C++
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Recommendations tracked on public social media and blogs since March 2021.


Use Online Tools: There are many online regex testers and visualizers that can help you see how your patterns match against sample text. These tools often provide explanations for each part of the regex. I personally use... - Source: dev.to / over 1 year ago
However - here it becomes weird - when testing the original regex rule (the first one, without the \u00A0 part) on the same string in an interactive visualiser (https://regexr.com/ for instance), there is a match:. - Source: dev.to / about 2 years ago
Learned regex in the 90's from the Perl documentation, or possibly one of the oreilly perl references. That was a time where printed language references were more convenient than searching the internet. Perl still includes a shell... - Source: Hacker News / about 2 years ago
If you've used Python Tutor to understand code execution, you already know how powerful visual tracing can be. But if you've tried using it for LeetCode problems — especially linked lists and trees — you've probably hit its limits. - Source: dev.to / 6 months ago
Python Tutor: This tool allows you to visualize the execution of Python code step-by-step. - Source: dev.to / about 2 years ago
I would dare say for me the https://pythontutor.com/ even more so than compiler Explorer. (hint: it's not just for python). - Source: Hacker News / over 2 years ago
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Coding Assistant offers Personalized Coding Tutor, Code Generator, Explainer, Refactor, Convertor, Debugger, beginner-level coding interview problems, Compiler, and Daily News in Tech and Programming. It acts like your ultimate coding companion.
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The award-winning Expresso editor is equally suitable as a teaching tool for the beginning user of regular expressions or as a full-featured development environment for the experienced programmer with an extensive knowledge of regular expressions.
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Your very own Personal AI code assistant, ask him anything
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