While Adobe Photoshop is one of the best photo-editing software out there, it’s a bit annoying that it doesn’t natively support opening .ICO (icon) files. For opening and editing desktop icon graphics, many users try to use third-party alternatives – but there is actually a very simple PhotoShop plug-in for opening and saving .ICO files.

This plug-in will work for any PhotoShop version from 5.0 onwards for Windows, and a handful of versions for Mac ( it depends on the OS X version).

If for some awful strange reason, you’re using Windows 98, you can download an alternative build of the plugin.

Mac Compatibility

  • Photoshop CS5 on Intel Macintosh (32/64 bit)
  • Photoshop CS3 & CS4 on 32-bit Intel and PowerPC Macintosh
  • Photoshop 3.0-7.0, CS, CS2 on PowerPC Macintosh (OS X, OS 9 and Classic)
  • Photoshop 4.0 / MacOS 8.0 on 68K Macintosh

Windows Compatibility

  • Windows: Photoshop 5.0 and any later version on Windows 98/NT, XP, Vista, and Windows 7

Requirements

ICO file format plugin for Photoshop

To install

32-bit / 64-bit Windows (Vista/Windows 7):

Download the plugin and extract it to a folder.

Move the plugin file to C:\Program Files\Adobe\Photoshop\Plug-Ins\File Formats, or the 32-bit version if you’re on 32-bit Windows (C:\Program Files (x86). You may need to create the File Formats folder inside \Plug-Ins if it does not exist.

How to Open ICO Files in PhotoShop CC - 1

If you are running on a 64-bit Windows system and are launching the 64-bit version of Photoshop CS4 or CS5, download the 64-bit version of the plugin and put it in the Plug-Ins folder corresponding to 64-bit Photoshop (i.e., the one in “Program Files” not “Program Files (x86)”).

Move the plugin into the “File Formats” folder inside your Photoshop Plugins folder:

  • For Windows (32-bit), 8bi
  • For Windows (64-bit), 8bi

If using Corel PSP Photo X2, put the plugin in C:\Program Files\Corel\Corel Paint Shop Pro Photo X2\Languages\EN\PlugIns

Quit and relaunch Photoshop, if it’s already running.

To use the plugin

  • Use Photoshop’s Open command (File menu) to open .ICO and .CUR files (which will now appear in the file browser)
  • Use Photoshop’s Save command to create .ICO and .CUR files.
  • If saving .CUR, note that the cursor hotspot is defined by the ruler origin.

Having trouble?

  • If you are not sure if the plugin is correctly installed, look for “ICO (Windows Icon)” under Photoshop’s “About Plug-in” menu (on Windows, look under “Help”; on OS X, under “Photoshop”). If it is not listed:
  • Check you have downloaded the correct version (Windows/Mac)
  • Is it in the “File Formats” subdirectory of Photoshop’s “Plugins” folder?
  • Have you quit and re-launched Photoshop?
  • If you are running Vista and see the error “plugin entry point not found”, try restarting and reinstalling, or see this post .
  • The plugin is not a Filter or Import/Export plugin, so don’t look for it there. It appears as a format option when Opening or Saving (eligible images).
  • The ICO format does not allow images more than 256 pixels high or wide.
  • Only Bitmap, Grey Scale, Indexed and RGB mode images, no more than 8 bits per channel, can be saved as ICO.

About transparency

The ICO format has an inherent 1 bit transparency mask (0 = opaque, 1 = transparent), called the AND bitmap.

  • When reading or saving an RGB mode image in Photoshop 6.0 or later, layer transparency is used for the mask
  • If the image is Indexed mode, and uses a “transparent index”, this will be used to set the icon mask
  • In other cases, the ICO mask is treated as an alpha channel (black = 0 = opaque, white = 255 = transparent)
  • In PNG (Vista) format icons, the alpha channel is simply stored as part of the PNG. There is no separate mask.

Saving indexed mode images

To ensure output files are as compact as possible, the smallest pixel depth is chosen sufficient to represent the colours used by the icon:

  • RGB mode: no colour table
  • Indexed/Grey Scale mode with >16 colours: 8 bits per pixel (up to 256 colours in colour table)
  • Indexed/Grey Scale mode with >2 colours: 4 bits per pixel (up to 16 colours in colour table)
  • Bitmap or Indexed/Grey Scale mode with 2 or fewer colours: 1 bit per pixel (up to 2 colours in colour table)

A note on file sizes (Mac only)

Do not be alarmed if the Mac Finder shows an unexpectedly large file size for ICO files saved out of Photoshop. The ICO itself is stored in the data fork and is as small as possible (see above).

The Finder’s size calculation is increased by Photoshop’s prolific “metadata” in the resource fork, and does not truly reflect the size of the ICO data. (This is stored for all files saved out of Photoshop, regardless of format, and whether image thumbnails and previews are enabled in Preferences.) Finder’s “K” size is also affected by the volume’s minimum allocation size (often 4 or 8K depending on partition size).

On upload to a web site, the data fork alone is copied and the resource fork is stripped, and so this extra data (and Finder’s padded figure) has no effect or relevance whatsoever. The “true” logical size of the ICO file can be confirmed in OS X’s Terminal with ls -l in the icon’s directory (or files -x br in MPW Shell).

About 32-bit(Windows XP) icons

The plugin can create 32-bit icons with 8-bit alpha transparency. This will occur in two cases:

  1. in Photoshop 6.0 or later, saving a layered RGB image (i.e. not flattened)
  2. in any version of Photoshop, saving a flat RGB image with 2 or more alpha channels.

In the first case, the layer transparency will be used as the ICO alpha. The 1-bit “AND mask” is taken from the first alpha channel, or if there is no available alpha channel, is derived from layer transparency.

In the second case, the first alpha channel is used to create the 1-bit “AND mask”, and the second alpha channel becomes the 8-bit ICO alpha.

In both cases, the colour data is set to zero (black) where the icon is transparent. This should produce the desired result (complete transparency over the background).

How to Fix “Printer is in an error state” Issue?

The error “ WinRAR Error: Next Volume Is Required ” usually appears when you’re extracting a multi-part RAR archive and WinRAR can’t find (or can’t correctly identify) the next file in the sequence . This often happens when a volume is missing , stored in a different folder , or renamed in a way that breaks the archive’s expected order .

How to Open ICO Files in PhotoShop CC - 2

In this guide, we’ll go over the most reliable fixes confirmed by affected users, along with what each method is doing behind the scenes so you can choose the right one for your situation.

Important: To extract multi-volume archives, you should always start extraction from the first file in the set. This is usually file.part1.rar , or (in older sets) the main .rar file that comes before .r01 , .r02 , and so on.

1. Download and Place the Missing RAR File

WinRAR needs all parts of a multi-volume archive to complete extraction. This error usually appears when one of the volumes in a set like .part2.rar , .r01 , .r02 , .001 , and similar naming formats is missing . Downloading the missing volume and placing it in the same folder as the other parts allows WinRAR to continue extracting normally .

  1. Look at the error message or review the list of archive parts in the folder.
  2. Identify which volume is missing (for example, part2.rar , .r02 , .001 , etc.).
  3. Go back to the website or source where you downloaded the archive.
  4. Locate and download the exact missing file using the same naming format as the others.
  5. Make sure the new file name matches the pattern of the rest. Example: If you have file.part1.rar and file.part3.rar , the missing one must be file.part2.rar .
  6. Move the downloaded missing volume into the same folder as the other archive parts.
  7. Confirm that all parts are in a single folder before extracting.
  8. Right-click the first file in the series (usually part1 or the main .rar file) and select Extract Here or Extract to Folder .
  9. WinRAR should now detect all volumes and continue extraction normally .

2. Manually Browse & Select the Next Volume

Use this method only if the next volume already exists , but WinRAR is failing to detect it automatically. This can happen due to incorrect naming , the file being in a different location , or a temporary file access issue. Manually browsing helps WinRAR locate the correct volume and resume extraction without interruption .

  1. Right-click the first file in the series (usually .rar or part1.rar ) and select Extract Here or Extract to Folder .
  2. When WinRAR cannot find the next volume, it will show the “ Next Volume Is Required ” message.
  3. A small window will appear, allowing you to manually select the next volume .
  4. Use the file explorer window to locate the folder where the other archive parts are saved.
  5. Select the next part based on the naming order (example: select file.part2.rar after file.part1.rar ).
  6. Make sure the selected file matches the naming format of the archive (no extra characters like (1) and no mismatched numbering).
  7. WinRAR will resume extraction using the selected volume .
  8. If additional volumes are missing or stored separately, WinRAR may prompt you again. Repeat the same process until extraction completes.

3. Rename the RAR files in Order

WinRAR relies on a proper naming sequence (such as file.part1.rar , file.part2.rar , file.part3.rar ) to extract multi-volume archives. If a file is named incorrectly, contains extra characters, or is out of order, WinRAR may fail to locate the next volume and show this error. Renaming the files correctly helps WinRAR follow the sequence and extract the archive without interruptions .

Note: Renaming only changes the file name , not the file contents. The goal is to restore the correct sequence so WinRAR can detect the next volume.

  1. Go to the folder where all the RAR files are saved.
  2. Make sure all parts of the archive are present and stored in the same folder .
  3. Check how the parts are currently named . Common patterns include:
file.part1.rar, file.part2.rar, file.part3.rar
file.rar, file.r01, file.r02, file.r03
  1. Look for files that don’t match the expected numbering pattern (for example, file.part01.rar , file.part1(1).rar , or unrelated names).
  2. Rename each file so it follows the same order without extra characters or mismatched numbering. Example:
Incorrect: file.part1.rar, file.part3.rar, file.part2(1).rar
Correct: file.part1.rar, file.part2.rar, file.part3.rar
  1. Make sure the text before the number is exactly the same for all files.
  2. Only the last part number should change.
  3. Right-click the first file in the series (usually part1.rar or the main .rar file) and select Extract Here .
  4. WinRAR should now recognize the sequence and continue extraction normally .

If you still get the same prompt: the archive set is likely incomplete (a part was never downloaded or was removed), or one of the volumes is corrupt and must be re-downloaded from the original source.