Browse file extensions by category or letter. Learn what each file type is used for and find software that can open, view, edit, or convert it.
Use this directory to look up file formats, understand what files are used for, and find compatible applications for Windows, macOS, Linux, mobile, and online tools.
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A .pyd file is a dynamic link library (DLL) written in Python. It's essentially a compiled Python extension module that can be importe…
A .pyo file is a compiled version of a Python source code file (.py). It's created when Python is run with the `-O` or `-OO` optimizat…
A .pyw file is a Python source code file designed primarily for graphical user interface (GUI) applications on Windows. The key differ…
A .pyz file is a Python Zip Application, which is an archive containing Python code that can be executed directly. It's essentially a…
A .pyd file is a dynamic link library (DLL) written in Python. It's essentially a compiled Python extension module that can be imported and used within Python…
A .pyo file is a compiled version of a Python source code file (.py). It's created when Python is run with the `-O` or `-OO` optimization flags. These flags in…
A .pyw file is a Python source code file designed primarily for graphical user interface (GUI) applications on Windows. The key difference between .py and .pyw…
A .pyz file is a Python Zip Application, which is an archive containing Python code that can be executed directly. It's essentially a self-contained Python app…
Everything you need to know about file extensions