Developer tools / regex101
regex101
Build, test, debug and convert regex with real-time matches, clear explanations and an AI-assisted workflow. Supports PCRE2, JavaScript, Python and more.
Where it stands
3.8 / 5
Signals score
Not a hands-on test
Based on 1 of 3 signals
- Website health4.2 / 5 · weight 50%
Measured from the tool's public website
Built only from what we can measure or quote without using the tool. How ranking works
Rank by signals
We have not run our own hands-on test on regex101 yet. How tests work
Disclosure: agathox makes some of the tools listed here. They are labelled and scored by the same method as every other tool.
Measured signals
4.2 / 5 · measured 2026-11-08Read automatically from regex101's public website: how reliable, secure, private and open the site is. This is not a test of how well the tool does its job. How this is measured
- Reliability5 / 5The page answered and finished downloading in 95 ms.
- Security5 / 54 of 5 protective headers set (content-security-policy, x-content-type-options, referrer-policy, x-frame-options).
- Privacy5 / 5No third-party tracking services found on the page.
- Transparency1 / 5No privacy policy linked; no pricing page linked.
Community feedback
We found no public discussion of this tool to read.
Threads: RegEx101.com now offers a debugger (2013, 30 comments) · Regex101: online regexp tester and debugger (2013, 10 comments) · Show HN: Regex101 - Interactive regular expression learning tool and builder (2013, 4 comments)
Listed, not yet tested
This tool answered when we visited its site on 2026-11-10. The description above is the tool's own. We have not tested it or recorded facts about its limits, pricing or privacy, so it has no score. Are you the maker? Claim this listing to correct details and request a test.
Are you the maker of regex101? Link to this page
Copy this into your site. The link goes to this page, and it does not change any score.
<a href="https://agathox.com/tools/regex101">regex101 on agathox: compared and tested</a>
Tasks and scores
- Regex testerNot tested yet
Similar tools
Top signals in Regex tester.
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