regex-debugger

regex101 for the terminal — real-time matching, 3 engines, capture groups, replace mode, syntax highlighting, plain-English explanations, undo/redo, mouse support. Written in Rust.

A modern, visual, debuggable workbench for regular expressions — railroad diagrams, node editor, step debugger, multi-flavor & multi-language code generation.

Regex Visualizer & Debugger (VSCode extension)

A modern web application for testing and building regular expressions with real-time preview

Free online regex tester: enter a pattern and test text to see every match highlighted live, with a match and capture-group list, flag toggles (global, case-insensitive, multiline, dotAll, unicode) and a plain-language cheat sheet explaining tokens like \d, \w, + and *. Includes a local account to save your pattern library with notes.

A simple tool to test and visualize regular expressions in real time.

Free, open source Chrome regex tester. Test, debug, and master regular expressions in your browser. Real-time highlighting, multi-flavor, code export. Manifest V3.

Explain regex patterns in plain English, token by token: anchors, character classes, quantifiers, groups, lookarounds and flags. CLI and library.