JPEG and JPG: one format, two extensions
JPEG and JPG are two extensions for the same image format. A photo saved as photo.jpeg and one saved as photo.jpg store the picture in the same way. Only the end of the file name is different.
Converting JPEG to JPG, or JPG to JPEG, with Pixcon still helps in these cases.
- An upload form or program accepts only one of the two extensions.
- A whole set of photos should have the same extension.
- The photos also need a new size, a crop or a smaller file.
Pixcon encodes a new file instead of renaming it
When you convert between JPEG and JPG, Pixcon decodes the photo and encodes it again. The result is a new file with the original name and the extension chosen in "Convert to:".
- Orientation
- Applied from the EXIF data, so the new JPG is upright.
- Compression
- A new lossy JPG compression pass, even with "Optimize images" off.
- "Optimize images" on (default)
- Stronger compression and usually a smaller file.
- "Optimize images" off
- The highest JPG quality that Pixcon offers, with a larger file.
Rename the file or convert it
Renaming the file, for example from photo.jpeg to photo.jpg, is enough when only the extension matters. A renamed file keeps the original image data, so the picture is not compressed again.
Convert with Pixcon when the photos should also change. Choose "Resize" to make them smaller or "Crop" to cut them around the center. With "Original Size", leaving "Optimize images" on usually makes the file smaller.
A JPEG that is already strongly compressed may not get smaller with "Optimize images" and can even grow slightly. In that case, keep the original file.
Choose JPG in "Convert to:" to get files that end in .jpg, or JPEG to get files that end in .jpeg.
Questions about JPEG and JPG files
Is JPEG the same as JPG?
Yes. JPEG and JPG are two names for the same image format. The only difference is the file extension, and it matters only when a form or program accepts just one of them.
Can I just rename the file instead of converting it?
Yes. Renaming is enough when only the extension matters, because the format stays the same. Renaming also avoids the new compression pass that Pixcon makes when it saves a JPG.
Does converting between JPEG and JPG change the image quality?
Slightly, yes. Pixcon encodes the photo again with lossy JPG compression. Turn off "Optimize images" for the highest quality, or leave it on for a file that is usually smaller.
Can I resize or compress the photos while changing the extension?
Yes. Choose "Resize" and enter a "Width:" or "Height:" of up to 4096 px, and leave "Optimize images" on for stronger compression. Pixcon applies both settings when it saves the new file.