Regex Tester

Test and debug regular expressions with real-time highlighting, match groups, and replace.

Regular Expression

/ /

g global m multiline i case-insensitive s dotAll u unicode

Test String

Match Highlighting

Match Details

Replace

Replacement String

Result

Common Patterns

About Regex Tester

Test and debug JavaScript regular expressions in real-time. See matches highlighted in your test string, view captured groups, and test replacements with backreferences ($1, $2). Includes common regex patterns for emails, URLs, IP addresses, and more. All processing runs in your browser.

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