RegEx Tester & Highlight Matcher
Build, test, and debug regular expressions with real-time match highlighting and group capturing.
100% Client-Side (No data leaves your device)
/
/
gi
Test String
Match Details (0 matches)
| # | Match Text | Index | Length | Capture Groups |
|---|---|---|---|---|
| Enter a valid pattern to display matching list entries. | ||||
User Guide: Regular Expression Syntax Rules
Character Classes & Quantifiers
Construct filters using character matches:
\dmatches digits,\wmatches alphanumeric characters,\smatches whitespaces.+matches 1 or more,*matches 0 or more,?matches 0 or 1, and{n}matches exactly n repeats.
Anchors & Groups
^matches start of line,$matches end of line.(abc)creates a Capture Group, separating substrings from the overall match, while[abc]matches any single character in the brackets.