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Home/Categories/Regex/regex101

regex101

The most popular regex tester and debugger with live explanation.

RegexOpen SourceFree

Open Website GitHubCompare

AktifKoding is a directory — this link opens the official regex101 website.Link verified Oct 25, 2026

Useful for

Testing regular expressions
Understanding regex

Alternatives to regex101

RegExrOnline regex tester with reference, cheatsheet and community patterns.

DebuggexRegex tester with railway diagram visualization for PCRE, Python and JS.

Details

Category: Regex
Pricing: Free
Open Source: Yes
Self-hostable: No
Platforms: Web

Tags

regex tester debugger explanation

Metadata is editorially curated and periodically re-verified. Always confirm pricing on the official website.