~/tools/regex-tester

Regex Tester

Test and debug regular expressions with real-time match highlighting and capture group display. Supports global, case-insensitive, multiline, and dotall flags with ReDoS protection.

Pattern

//g

Flags

Test String

Tip: Matches update live as you type

Live match highlighting
Flag toggles (g, i, m, s)
Capture group display
Match count badge
ReDoS protection (1s timeout)

100% client-sideProcessing stays on your machine.

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