Regex Tester
Test regular expressions against a string and see all matches with captured groups. Uses Rust regex syntax (no backreferences or lookaround).
All processing happens locally in your browser. No files are uploaded.
Enter a regex pattern and test text, then click Test to see all matches and captured groups.
Pattern
Flags
Test text
FAQ
- Which regex engine is used?
- The Rust regex crate. It supports most standard features — character classes, quantifiers, alternation, anchors — but does not support backreferences or lookaround assertions.
- Which flags are supported?
- i = case-insensitive, m = multi-line (^/$ match line boundaries), s = dot-matches-newline.
- Why is my pattern not matching?
- Check for backslash escaping: literal dots need \. and literal parentheses need \(. Also ensure the regex syntax matches the Rust regex flavor.