Free
regex101
Open SourceRegex
The most popular regex tester and debugger with live explanation.
regextesterdebuggerexplanation
Discover the 8 best browser-based tools for regex. Run directly in any modern browser without local installation. Curated, compared, and updated for developers.
| Tool | Pricing | Platforms | Top Strength | Link |
|---|---|---|---|---|
| regex101 | free | web | The most popular regex tester and debugger with live explanation. | Details → |
| RegExr | free | web | Online regex tester with reference, cheatsheet and community patterns. | Details → |
| Regexper | free | web | Visualize regular expressions as railroad diagrams. | Details → |
| Debuggex | free | web | Regex tester with railway diagram visualization for PCRE, Python and JS. | Details → |
| Regex Generator | free | web | Generate regular expressions from sample text matches. | Details → |
| iHateRegex | free | web | Collection of ready-made regex snippets with visual explanations. | Details → |
| RegexOne | free | web | Learn regular expressions step by step with interactive examples. | Details → |
| Regular-Expressions.info | free | web | Comprehensive regex tutorial and reference for all flavors. | Details → |
Regex
The most popular regex tester and debugger with live explanation.
Regex
Online regex tester with reference, cheatsheet and community patterns.
Regex
Visualize regular expressions as railroad diagrams.
Regex
Regex tester with railway diagram visualization for PCRE, Python and JS.
Regex
Generate regular expressions from sample text matches.
Regex
Collection of ready-made regex snippets with visual explanations.
Regex
Learn regular expressions step by step with interactive examples.
Comprehensive regex tutorial and reference for all flavors.