Code Tools

Regex Tester

Test regular expressions against sample text.

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Pattern

/ /

Test text

Highlighted matches

Match list

Common questions

FAQ

1 Which regex flavor?

JavaScript ECMAScript regex — same as new RegExp(...). Lookbehind and named groups are supported in modern browsers.

Format and indent HTML markup.

Remove whitespace and comments from CSS.

Compact JavaScript by removing whitespace.

Compare two text blobs line-by-line.

Convert text between case styles.