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Tools for focused regex work.
9 tools. Use Control or Command K to search from any page.
Test a JavaScript regular expression locally and see match status, counts, text, positions and capture groups.
Escape plain text for literal matching in a JavaScript regular expression, entirely in your browser.
Preview JavaScript regex replacements locally, including replacement tokens and the number of replacements.
Inspect each JavaScript regex match with numbered cards, exact text, start and end offsets, length and groups.
Extract numbered and named JavaScript regex capture values per match, keeping empty and unmatched groups distinct.
Compare a JavaScript regex independently with no flags and each of g, i, m, s, u, y and d, including browser support errors.
Build JavaScript regex source from literal text or a character mode and quantifier, with clear case-insensitive usage guidance.
Inspect JavaScript regex capture definitions, non-capturing groups and lookarounds alongside per-match capture values.
Split text with a JavaScript regex separator and inspect numbered parts, including captured separators, empty values and unmatched captures.