Puddletag is a graphical audio file metadata editor ("tagger") for Unix-like operating systems.

It is free and open-source software subject to the terms of the GNU General Public License (GPL) version 3.[4] In most major desktop Linux distributions, it is available from standard package repositories. Under Arch Linux(-based ones) it can be obtained from community repositories.[5]

The user interface is modeled after the popular Windows freeware Mp3tag. It uses a spreadsheet-like layout so that all the tags a user may want to edit by hand are visible and easily editable. All the other audio taggers available for Linux take a different approach to user interface design. The interface elements can be freely arranged. According to the popular prototypical Windows application, which it is supposed to replace under Linux, it is also regularly praised for its particularly large functionality and recommended for more demanding users.

In July 2008, the first version (0.1) was released via SourceForge.[6] The website counted several thousand downloads for each release before the project finally left the platform in early 2016[7] and was included in the package sources of most major Linux distributions. Version 1.0 was released in 2012, introducing support for AcoustID.

Puddletag is written in Python 2.x and uses Qt 4 (through PyQt) for its graphical user interface. As backend it utilizes Mutagen, a Python module to handle audio metadata. Mutagen works on Python 2.6, 2.7, 3.3, 3.4 (CPython and PyPy) and has no dependencies outside the Python standard library.