Fix NS_E_WMP_GIF_UNEXPECTED_ENDOFFILE (0XC00D1024)

Quick Answer (for the impatient)

Rename the GIF file to .jpg and play it in a photo viewer, or convert it to PNG using any free converter. The error means the GIF file is truncated—missing data at the end. You can't fix that in WMP; you need to replace or re-encode the file.

That error code, 0XC00D1024, shows up when Windows Media Player (both version 11 and 12) tries to load a GIF image and runs out of data before reaching the end of the image. GIF files have a specific structure: a header, a color table, then a series of image blocks, and finally a trailer byte. If the file gets cut off—say, from an interrupted download, a failed transfer, or a hard drive hiccup—WMP throws this error. It's not a codec issue, and it's not a player bug. It's just a garbage file that WMP refuses to touch.

You'll see this most often when you drag a GIF from a web page into your local folder and the browser didn't finish saving it. Or when someone emails you a GIF that got truncated by their mail server. The file might still open in a browser (because browsers are forgiving), but WMP is picky and stops dead.

Fix Steps (main solution)

Try these in order. The first one usually solves it.

Step 1: Verify the file is truly corrupted

Right-click the GIF file and choose Properties.
Look at the Size value. Does it seem too small for an animated GIF? For example, a 5-second, 500x500 animation is typically 500KB to 2MB. If your file is 14KB, that's a red flag.
Open the file in a browser (drag it into Chrome or Edge). If it plays normally, the file might still be structurally broken but browsers ignore that. WMP doesn't.

After this step, you'll know whether to bother with the next steps. If the size is obviously tiny, skip to Step 3.

Step 2: Re-download or re-copy the file

If you downloaded it, go back to the source and download it again. Use a download manager or just right-click and "Save link as" instead of copying from the browser cache.
If you copied it from a USB drive or network share, copy it again. Use robocopy or just drag-and-drop again, but make sure the source is intact.
After you have the fresh copy, right-click the new file and choose Open with > Windows Media Player. If it plays without the error, you're done.

You should see the GIF playing as a still image or animation (WMP shows animated GIFs as a slideshow of frames). If you get the same error, move to the next step.

Step 3: Convert the GIF to PNG (or JPG)

Download a free image converter like ImageMagick or use an online service like CloudConvert. I prefer ImageMagick because it's offline and handles weird files better.
Open Command Prompt (press Win + R, type cmd, hit Enter).
Navigate to the folder with your GIF. For example: cd C:\Users\YourName\Downloads
Run this command (replace broken.gif and fixed.png with your file names):

magick broken.gif fixed.png

If you don't have ImageMagick, use the built-in Paint: open the GIF in Paint (right-click > Open with > Paint), then press Ctrl + S to save as PNG. But that only works if Paint can open it. If Paint gives you an error too, then ImageMagick is your friend.

After the conversion, play the PNG in WMP. PNG files don't animate, but they display fine and won't throw that error. You'll lose the animation, but at least you'll see the image.

Alternative Fixes (if the main one fails)

If none of the above work, the file is beyond repair. Here's what else you can try:

Alternative 1: Use a GIF repair tool

There are utilities like GIMP that can sometimes open a truncated GIF and then re-export it. Open GIMP, drag the GIF in, and if it loads (even partially), go to File > Export As and choose GIF. GIMP will re-encode it cleanly. This might fix the truncation if the missing part is just the trailer byte.

Alternative 2: Play it in VLC instead

VLC media player is far more tolerant of broken files. Download VLC, install it, and drag the GIF onto the VLC window. It will likely play it without complaint. That doesn't fix the file, but it gets you watching it now.

Alternative 3: Delete the file and forget it

Honestly, if it's an old meme or a small animation, you can just delete it. The time you spend fixing it isn't worth it. Right-click > Delete, empty the recycle bin, and move on.

Prevention Tips

This error won't happen often if you follow one rule: never copy GIF files from a browser cache or a compressed email attachment. Always download them properly. When you download, make sure the download completes 100%—if your internet drops mid-download, you'll get a truncated file.

Also, if you're transferring GIFs between devices, use a reliable method like a cloud drive (Google Drive, OneDrive) or a USB cable with a proper eject. Copying over Wi-Fi can corrupt files if the connection is unstable.

And if you're the one creating GIFs, make sure you export them with a tool that writes the trailer byte. I've seen some cheap GIF makers cut corners. Use Photoshop, GIMP, or an online service like EZGIF.com that follows the spec.

The real takeaway: this error is a data integrity problem, not a WMP problem. Don't waste time tweaking WMP settings.