Launched January 6, 2026
Cyrilex
Online visual regex tester for Python, PHP, Ruby & more
FreeOpen Source228 impressions#976 of its week
Online regular expression tester for Python, PHP, Ruby, JS, Java and MySQL. Regex visualizer. Syntax highlighting. Cheatsheet. Generate string corresponding to a regex.
Cyrilex is an online regex tester, visualizer and generator supporting multiple languages.
- for
- Developers needing to test, debug and visualize regular expressions across languages.
- pricing
- free
- license
- MIT
Key features
6 features of Cyrilex
- Multi-engine support — Test regexes using JavaScript, PCRE (PHP, Python), Ruby, Java and MySQL engines.
- Regex visualizer — Graphically displays match groups and pattern structure for easier understanding.
- Flag selection UI — Choose common regex flags (g, i, m, s, u, x, etc.) via checkboxes.
- String generator (beta) — Generate a sample string that satisfies the entered regular expression.
- Substitution tool — Apply a replacement string to matches and see results instantly.
- Save & share — Persist regexes with optional password protection and share via URL.
Use cases
- Debug a complex email-validation regex across Python and PHP
- Visualize match groups for a long JavaScript pattern
- Generate test data strings from a regex for unit tests
- Share a regex with teammates while protecting edits with a password
Cyrilex FAQ
What regex engines are available?+
You can select JavaScript, PCRE (used by PHP and Python), Ruby, Java, or MySQL 8 engines.
Can I generate example strings from a regex?+
Yes, the beta "Generate a string from RegEx" feature creates a matching string.
Is there a way to share my regexes?+
You can save a regex, protect it with a password, and share the generated link.
Does the tool support substitution?+
Enter a replacement string in the Substitution field; substitutions are applied automatically.
Are there any usage limits or paid plans?+
The service is free and supported by advertising; no paid tiers are listed.
Summarized by DevHunt from extendsclass.com · Oct 6, 2026. Details may change; check the official site.
