Software & Apps File Types What Is an ACV File? How to open, edit, & convert ACV files by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on February 18, 2020 File Types Design Cryptocurrency MS Office Windows Linux Google Drive Apps File Types Backup & Utilities View More Tweet Share Email A file with the ACV file extension is an Adobe Curve file that Adobe Photoshop uses to store custom RGB colors that have been adjusted with its built-in Curves tool. Adobe Photoshop comes installed with ACV files, stored in the program's installation folder. You can also make your own custom ACV files or download ACV files from the internet, and then use the Curves tool to import them into Photoshop. Photoshop also uses the similar AMP file format for storing the same data found in ACV files, but you're able to draw the curve yourself instead of adjusting the line you're given in the Curves tool. If you're sure the ACV file you have has nothing to do with Photoshop, it may instead be an OS/2 Audio Driver file. How to Open an ACV File ACV files are created and opened with Adobe Photoshop through its Image > Adjustments > Curves menu option (or Ctrl+M in Windows). Choose the small settings/gear button near the top of the Curves window to select either Save Preset or Load Preset, to make or open an ACV file. You can also open an ACV file by saving it in Photoshop's installation directory. This will list the ACV file along with the other presets in the Curves tool. If you're importing multiple Adobe Curve files at once, this is the best way to do it. Here's an example of the default folder used for Adobe Photoshop's Curve files in Windows: C:\Program Files\Adobe\Adobe Photoshop 2020\Presets\Curves If you have an ACV file that you're positive isn't used with Photoshop, try opening it with a free text editor. Doing it this way lets you see the file as a text document. If you look through the text, you might be able to find some keywords that help you determine what program was used to create the ACV file, which is normally all you need to find the program that's capable of opening it. OS/2 stands for Operating System/2, so an ACV that's an OS/2 Audio Driver file is an audio driver used in that operating system. It's highly unlikely that your ACV file is of this format. Frankly, if it is, you probably knew that already. Again, there's a good chance that the ACV file you have is associated with Adobe Photoshop. However, if that's not the case, or if some other program tries to open ACV files by default, and you want to change this, it's very easy to do. How to Convert an ACV File Common file types like DOCX and PDF are often converted to other formats using a free file converter, but ACV files don't really serve a purpose outside of the context of Adobe Photoshop, so there's no need to convert an ACV file to any other format. If you find that your file is really just a text file, you can convert it to other text-based formats like TXT and HTML, with any text editor program. See this Best Free Text Editors list for our favorites. Still Can't Open Your File? The primary reason your file isn't opening at this point is most likely because you're not really dealing with an ACV file. Several other file types use a file extension that's very similar to .ACV, so if your file doesn't open with Adobe Photoshop's Curves tool, make sure you're not misreading the extension. Some other Photoshop file types that are similar include ACB, ACF, ACO, and ACT files, but none of them open in the same way as ACV files. Other similarly named, but non-Photoshop file extensions include AC3, SCV, ASV, and CVX. If it's not really an ACV file that you're trying to open, then research the file's true extension to learn which programs can be used to open or convert it.