🔍Regex Tester

Test and debug regular expressions. All processing happens in your browser.

No data is sent to any server. Regex testing is done locally and never leaves your device.
✅ 2 matches found
#1
"[email protected]"
Index: 14
#2
"[email protected]"
Index: 35

About Regular Expressions

Regular expressions (regex) are patterns used to match character combinations in strings. They are powerful tools for searching, validating, and manipulating text.

Common flags:

gGlobal (all matches)
iCase insensitive
mMultiline mode

Quick reference:

\d — digit (0-9)
\w — word character (a-z, A-Z, 0-9, _)
\s — whitespace
. — any character
+ — one or more
* — zero or more
? — zero or one

Use cases: Email/URL validation, search & replace, parsing logs, data extraction, input sanitization