What is a CHK file?
A .CHK file is usually a recovered data fragment created by the Microsoft Windows CHKDSK utility. When a computer crashes, loses power, or experiences a corrupted storage drive, the operating system tries to fix the file system errors. It saves the recovered pieces of data as .CHK files in a hidden folder named `FOUND.000`. These fragments can contain parts of original files, such as .ZIP archives, .DOCX documents, .PNG images, or .MP3 audio.
Other software also uses the .CHK file extension. Netgear uses it for router firmware update files. Antivirus software by Sophos uses it for the InterCheck Checksum Database. Finally, Blizzard Entertainment uses it for StarCraft chunk files.
How to open CHK files?
Because a .CHK file can contain many different types of data, it is difficult to open it directly. You must identify the original file signature first. You can use specialized recovery utilities like UnCHK to guess the original file format.
If you want a fast and safe solution, viewer.online/chk can analyze .CHK files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
Best practices and troubleshooting
If you know the original file format, you can manually rename the .CHK extension to the correct extension, like .JPG or .DOC. The file will open normally if the fragment contains the complete file data.
If your .CHK file is a router update, do not try to open it on your computer. Upload it directly to the Netgear router administration panel.
Once you identify the true format of your recovered data, we recommend file conversion to sensible target formats like .PDF, .JPG, or .ZIP on convert.guru.
Summary
A .CHK file has multiple possible meanings. We recommend viewer.online/chk to identify the actual format of the user's file. Ultimately, viewer.online/chk is useful for identifying, inspecting, and understanding .CHK files without installing software or dealing with compatibility problems.