How to Convert a JPEG to a PES Using PE Design. The Brother PE Design application will open and convert a JPEG. PES file, the native PE Design file format. To convert a file to the PES format, you need to have the SD card used to transfer files to the Brother sewing machine. Visual Sourcesafe 2005 Full. The SD card must be connected to the computer via an SD card reader. Make sure you have the Brother SD card inserted into the computer, because the conversion of the JPEG file format to the PES file type occurs when saving the embroidery file to the Brother card. Step. Right click on the JPEG file to show the File context menu. Step. Click the Open With option in the context menu. A list of available programs opens. Step. Click the Brother PE Design option in the programs list. The JPEG file opens in the PE Design program. Step. Click the File option on the top navigation bar, and then click Write to Card. The File Save dialog box opens. The Sew Whats New Archive. I have just purchased Brother PE Design software. I keep getting the message unexpected file format. You should buy my PEDesign4 CDBook. If you have PEDesignPalette. PEDesign 5 CDBook is not. UNEXPECTED FILE FORMAT MORE ABOUT FILE TYPES. Pe Design Unexpected File Format' title='Pe Design Unexpected File Format' />Step. Click the PES. Save as Type drop down list. Step. Click the Save button. The JPEG file is converted to the PES file format. Problem with Brother pes format Sign in. Unexpected file format. Example PEDESIGN 4 not understand format number 6 PEDesign 6. The Brother PEDesign application will open and convert a JPEG. PES file, the native PEDesign file format. To convert a file to the PES format, you. I have a PES file that I can see with Embroidery reader, but I cannot open it with PEDESIGN. I receive the message unexpected file format. Computer and when ever I open a design with open or open as and choose PE7 which is PES the design is also PES it says unexpected file format.