Regex Tester

Test regular expressions, inspect capture groups, and preview replacements

StatusValid
/
/

Common Patterns

Click a pattern to fill the expression, flags, and sample text.

Test Text

Enter or paste text to match

3 lines

Match Highlight

Preview matched ranges in real time

2 matches
Contact dev@example.com for the API key.
Backup email: ops@example.com
Invalid text should stay untouched.

Match Details

Inspect positions and captured groups

#18 - 23
dev@example.com
#255 - 70
ops@example.com

Replace Preview

Supports $1, $2 and named group replacement syntax

Contact [email] for the API key.
Backup email: [email]
Invalid text should stay untouched.