Because the JPEG is one of the world’s most widely used file formats for a digital image, it’s typically the best file format for an image that’s meant to be shared.

Google hopes its new Guetzli JPEG encoder will speed up image-heavy websites and cut bandwidth costs for mobile users.

To open RAW image files in Photoshop CS6, you need to download the Camera Raw add-in. It is an official add-in; you can download it from the official repository.

Google's new open-source image compression algorithm promises to reduce JPEG file sizes by 35 percent more than other methods.

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.

After you complete the process, you can open and view the JPEG like any other image - the only thing that might tip off that the image has got a secret is a potentially bloated file size.