ACS2 File

What are ACS2 files and how to open them

Are you having problems opening an ACS2 file or are you simply curious about its contents? We're here to explain the properties of these files and provide you with software that can open or handle your ACS2 files.

What is an ACS2 file?

An .ACS2 file is an AIMP Skin file.

AIMP Skin (version 2) files store custom appearance themes for the AIMP media player. Created by the AIMP DevTeam, these .ACS2 files allow users to change how AIMP looks - defining layouts of buttons, panels, backgrounds, text and border styles to personalize the user interface.

AIMP writes these files when a skin is designed using its skin editor, and AIMP reads them when you select and apply a skin from its skins list. They are placed in AIMP's Skins folder (for example, under Program Files\AIMP\Skins). The skin data includes container layout, panel positions, font and text color settings, border appearance, and similar interface theme details.

Version 2 is older than later skin formats (such as ACS3 or ACS4) used by newer AIMP releases. It does not include editing project metadata included in project files that are used only for editing skins (not for playing them).

The file begins with the ASCII header "ACSP" in its first four bytes at offset 0, identifying that it is an AIMP Skin version 2 file.

How to open ACS2 files

Important: Different programs may use files with the ACS2 file extension for different purposes, so unless you are sure which format your ACS2 file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested two different ACS2 openers which you will find listed below.

Last updated: August 17, 2026

Various apps that use files with this extension

These apps are known to open certain types of ACS2 files. Remember, different programs may use ACS2 files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Help us help others

File.org helps thousands of users every day, and we would love to hear from you if you have additional information about ACS2 file formats, example files, or compatible programs. Please use the links below or email us at submit@file.org to discuss further.