Loading tools...
Loading tools...
Test and debug regular expressions with real-time matching and highlighting
100% Private - Files Processed Locally
Your files never leave your device
Regular expressions (regex) are powerful patterns used for text matching, searching, and manipulation. This tester helps you build and debug regex patterns in real-time.
Features include: syntax highlighting of matches, support for capture groups, all standard regex flags, common pattern library, and instant feedback as you type.
Regular expressions are sequences of characters that define search patterns. They're used in programming for text validation, parsing, and transformation. Common uses include email validation, phone number extraction, and data cleaning.
Global (g): Find all occurrences. Case insensitive (i): Ignore letter case. Multiline (m): Match start/end of each line. DotAll (s): Dot matches newline characters. Unicode (u): Enable full Unicode matching.
Use parentheses () in your pattern to create capture groups. Groups are numbered from left to right starting at $1. You can access matched group content in the match details panel.
//gEnter a regex pattern above to start testing
0
Total Matches
0
Pattern Length
0
Input Length
1
Active Flags
Status