JPG to JPEG Converter

What happens when you convert JPG to JPEG

• JPG and JPEG are the same format with different extensions, so nothing is re-encoded. The file is copied byte for byte and saved with a .jpeg extension.
• Because the bytes are identical, the JPEG has exactly the same quality, dimensions and size as the JPG.

How to convert JPG to JPEG online

1. Press "Choose JPG files" and select one or more files, or drag them onto the box. You can add files of any size your device can hold in memory.
2. Adjust the settings if you need to. Lower quality gives a smaller file.
3. Press "Convert to JPEG". Images convert in a second or two each.
4. Save each JPEG with its download button. Close the tab and every trace of the files is gone from memory.

Why convert JPG to JPEG?

JPG files usually come from camera photos, web images and email attachments. People convert them to JPEG because JPEG opens everywhere and keeps photos small, which is why upload forms and email favour it.

In short, JPG is good at what it was made for, and JPEG is the more practical choice when the file has to open, upload or print somewhere else. JPG opens in every browser and image viewer, while JPEG opens in every browser and image viewer.

How to convert JPG to JPEG on Windows, Mac, iPhone and Android

On Windows

Open this page in Chrome, Edge or Firefox, drag your JPG files in from File Explorer, and press Convert. Each JPEG is saved to your Downloads folder. Paint can also re-save an image as JPEG with Save as, provided Windows can open the JPG in the first place.

On a Mac

Safari, Chrome and Firefox all work. Drag the JPG files from Finder onto the drop zone and the JPEG files land in Downloads. Preview can do single images too: open the file, choose File, then Export, and pick JPEG.

On iPhone and iPad

Open the page in Safari and tap Choose JPG files. You can pick from Photos or from the Files app. The converted JPEG appears in Files, in the Downloads folder; to put it in your photo library, open it there, tap Share and choose Save Image.

On Android

Open the page in Chrome, tap Choose JPG files and pick them from Files or your gallery. The JPEG is saved to the Download folder, where any file manager can find it.

JPG vs JPEG: the differences

About JPG and JPEG files

What is a JPG file?

JPG discards fine detail the eye is least sensitive to, which is why a photo shrinks to a tenth of its raw size but text and sharp edges pick up blocky artefacts. Every re-save at a lossy setting throws away a little more.

What is a JPEG file?

JPEG and JPG are the same format. The three-letter extension dates from old Windows systems that only allowed three characters after the dot, and both names are still in use.

JPG to JPEG not working? Common problems

• Colours look slightly different. Browsers convert images to the standard sRGB colour space when they decode them, so wide-gamut and CMYK images can shift a little.
• A phone photo comes out upright even though it looked sideways elsewhere. That is correct: the rotation stored in the photo is applied during conversion, so the JPEG is always the right way up.
• The file is bigger than expected. It is not: the JPEG is the same size as the JPG, byte for byte.

Convert JPG to JPEG from the command line

If you work in a terminal, ImageMagick converts JPG to JPEG in one line:

magick input.jpg -quality 90 output.jpeg

To convert every JPG in a folder at once, use magick mogrify -format jpeg *.jpg. The converter on this page does the same job without installing anything.