When you open an image in Photoshop, one of the following errors occurs:

  • Could not complete your request because it is not a valid Photoshop document.
  • Could not complete your request because an unknown or invalid JPEG marker type is found.
  • Could not complete your request because the file-format module cannot parse the file.
  • This is not a valid Portable Document File (PDF) document. It cannot be opened. 
Photoshop Error messages


Solution 1: Make sure that the filename extension matches the actual file type.

It's important that the extension you add to the filename is the appropriate one for the actual file type of the image. When you choose a format from the Format pop-up menu in the Save As dialog box, the appropriate extension is added automatically. If you entered the extension manually, you could have typed in an extension that doesn't match the file format of your file.


If you cannot remember the actual file type the file should be, see Determine the file type of a document.

Filename extensions are hidden by default. To turn them on, perform the following steps:

Mac OS

  1. In Finder, choose Finder > Finder Preferences > Advanced.
  2. Select Show all filename extensions.
  1. Open Windows Explorer.

    Open Windows Explorer
  2. If you don't see your menus, choose Organize > Layout > Menu Bar.

    Choose Organize > Layout > Menu Bar
  3. Choose Tools > Folder Options > View.

    Choose Tools > Folder Options > View
  4. Deselect Hide Extensions for Known File Types.

    Deselect the Hide Extensions for Known File Types checkbox
  5. Click Apply, then click OK.

Solution 2: Make sure that the file has only one filename extension.

Turn on filename extensions as in Solution 1, and view your images in Finder or Windows Explorer. Then, check to see of there are two extensions on your files. If your images have two extensions, such as:


Remove the last extension so the file is named:


Solution 3: Open the file in another photo app and save as JPEG

Open the problematic image in a photo app such as Preview (on macOS) or Photos (on Windows). Now save the file again as a JPEG image from within such an app. Try opening the file again in Photoshop.

Solution 4: Make sure that your hardware isn't damaged.

Validate your hardware to make sure that there are no hardware failures, such as with an external hard disk or network.