You can also take a screenshot of the image and save it in the JPEG format. Once the image gets opened and displayed in front of you on the browser, you can save it from there. Still your image is showing an invalid or unknown image file format then try the third method. Now open the image file and I hope your error has been fixed.

Uncheck Hide Extensions and click on Apply.

Click on View Tab then Click Show Hidden files and Folders.

Click on Appearance and Personalization.

Unhide Extension of the file (if there is any) Now try to open the image and see whether the error is still occurring or not.

In Save as Type column choose the format either.

Open the image with Paint or Adobe Photoshop.

Corrupted or broken header of NEF image file format. So, the most common causes of the corruption of the NEF file format are listed below: Due to the Viruses/Malware infection on the image file or storage device. NEF image file corruption takes place because of various causes, and which makes the image file inaccessible. You can download Windows 7 Service Pack ISO from Microsoft website).To mount an ISO file means to access its contents as if it was recorded on a physical medium and then inserted in the optical drive.

Lots of software is distributed in the form of ISO images (e.g. An ISO image is simply a 'virtual copy' of an optical CD/DVD disc. Tutorial: How to Mount an ISO File Using WinCDEmu. I will discuss it later in this article.įour Methods You can try to fix 'Invalid Image' Error So let's not waste our time discussing reasons for corruption. The reason for this error is a corruption of the image file which can be either in a JPG format or PNG format. In this article I am going to discuss how to fix Invalid or unknown image file format error.

Unknown or corrupt image file