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Regex Tester

Highlighted Matches

1 match(es)

user@example.com
invalid-address

Match Details

Match 1 at index 0

user@example.com

Regex Tester

Test patterns against sample text with flavor-specific translation notes.

FlavorPattern

Flags

Test textReplacement (optional)

Translated pattern

/^\w+(?:@\w+\.\w+)?$/gm

Flavor notes

Supports named capture groups, lookaround, and Unicode property escapes in modern engines.
Pattern literals use `/pattern/flags`; constructors use `new RegExp("pattern", "flags")`.
Backslashes must be doubled in string literals, but not in this tester.

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