- Is an Adobe format that should probably be only used to save Photoshop files.
- Do not distribute PSD files unless you are doing a Photoshop tutorial or something. Photoshop files are large.
- They can be compressed (RLE encoded) but often this compression does not yield a file that is much smaller.
- They can contain a lot of Photoshop specific data that the other formats can’t, such as paths.
- The layers are preserved when a file is saved using the PSD file format.
- You can go back, at anytime, to make changes to the layers.
- Is a great format for photos.
- Use JPEG for any photos you have and/or want to submit as they are much smaller files.
- All good web browsers support JPEG.
- JPEG uses a lossy compression algorithm so you will lose some detail when converting other formats like BMP to a JPEG but usually in the case of photos it is not noticable.
- If you have an illustrated image or a vector image, don’t use JPEG because the edges of lines may get blurred.