Regex Tester & Explainer

Write patterns, test against real strings, and get a plain-English breakdown of every token.

Use case

Build and debug regex patterns without guessing what each token or match is doing.

What to expect

Enter a pattern and test string to see live matches, execution feedback, and a plain-English explanation of each regex token.

Good to know

Great for validation, parsing, and search patterns, especially when a regex is correct but hard to reason about.

PATTERN

Flags:

TEST STRING

0 matches•0.0ms

HIGHLIGHTED PREVIEW0 chars

MATCHES0 matches

No matches yet.

Pattern Explained

Tokens appear here as you type

How to use this tool

Paste a regex pattern between the / delimiters. Add flags (g=global, i=case insensitive, m=multiline). Matches highlight in real-time. The Explainer panel breaks down each token into plain English.