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Regex Tester & ReDoS Guard

1,000ms ReDoS Worker Guard

Test, validate, and debug regular expressions with capture groups, live replacement preview, and 1,000ms ReDoS worker protection.

Client-Side Evaluation: Patterns and text never leave browser memory

Regular Expression

//g

Flags:

Test String

Replacement Template (Optional)

Matches Breakdown

3 matches 0.02ms

Match #1index: 13 (19 chars)

"support@example.com"

$1:"support"$2:"example.com"user:"support"domain:"example.com"

Match #2index: 36 (16 chars)

"admin@domain.org"

$1:"admin"$2:"domain.org"user:"admin"domain:"domain.org"

Match #3index: 98 (16 chars)

"sales@store.net."

$1:"sales"$2:"store.net."user:"sales"domain:"store.net."

Replace Preview

Reach out to [support on example.com] or [admin on domain.org] for inquiries.
Sales team is contactable via [sales on store.net.]

正規表現をテストする方法

ブラウザのフリーズを防ぐため、1000msで自動停止する安全機構です。