.PO

.PO file extension

This is the basic program to work with .PO extension

Poedit

PoeditGettext message catalog

Poedit is a text editor for translating apps and sites that use gettext. The program includes a built-in translation memory to help you translate faster. It remembers your past translations and uses them to make suggestions for similar texts. Over time, it learns enough to fill in frequently-used strings for you... (more)

The program works with the following extensions: po