File extension regex pattern
Copy and test a JavaScript regex for file extensions, with examples and a one-click link to the regex tester.
File extension regex pattern
Validate whole value
Use anchors to check whether the complete value matches.
Regex: ^\.[A-Za-z0-9]+(?:\.[A-Za-z0-9]+)*$
Flags: -
Search in text
Find matching fragments inside a larger block of text.
Regex: \.[A-Za-z0-9]+(?:\.[A-Za-z0-9]+)*\b
Flags: g
Examples that match
.png.tar.gz
Examples that do not match
png.
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