You can convert a JFIF file to JPG, though the two formats are nearly identical, and most software will open a JFIF file as a JPG.

The JPEG was first developed in the late 1980s, with the standards first published in 1992, to create a smaller yet standarized digital image file type.

Then, under Convert to PDF, click on "Select a file" to import the JPG of your choice. Acrobat will automatically convert it to a PDF, and you just need to save it to your local drive.

If you've scanned a document with your scanner or phone and have the image as a JPG file, it's often useful to convert that image to a PDF. Using Adobe Acrobat, you can even automatically process ...

So we need an easy of converting HEIC files on a Mac to the more common and universal JPEG/JPG format. Luckily, it’s easy to both open an HEIC file on a Mac, and convert it to JPEG.