File Extension Regex

Example:

\.[a-zA-Z0-9]+$

Matches:
✓ .jpg (from photo.jpg)
✓ .tar.gz (from file.tar.gz - matches .gz)

Extract file extensions: \.[a-zA-Z0-9]+$

Try Regex Lab →

FAQs

How to match .tar.gz completely?

Use: \.(tar\.gz|[a-zA-Z0-9]+)$ to special-case multi-dot extensions.