UnCHK is a free tool that is able to help you restore CHK files to the original extension. UnCHK can identify the following file types: JPG PSP PSD GIF ZIP CAB EXE DLL OCX WRI BMP DOC PPT XLS PDF RTF HTM WAV MID AVI RAR TIF MP3 WPD FPX EPS CLP. UnCHK can identify the following file types: JPG PSP PSD GIF ZIP CAB EXE DLL OCX WRI BMP DOC PPT XLS PDF RTF HTM WAV MID AVI RAR TIF MP3 WPD FPX EPS CLP. You can add more file types yourself so it can support more extensions. You can add more file types yourself, so it can support multiple extensions. Just drag a good file, drop it on the program and it will read and recognize the header. Simply drag a sound file, drop it on the program and it will read and recognize the title.

The license of this software is Freeware, you can free download and free use this data recovery software.