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On a computer, image files will have many different extensions (also known as file extensions). The file format determines the software you use to open or edit the file, and the file extension (the part after the “.”) determines the image format. When working with images, sometimes we need to convert files to a new format, so learning some ways to approach this problem is also essential! JPEG (similar to the JPG format) is a popular image extension that you’ll probably want to use.
Steps
Use default photo editing software
- Note that JPG and JPEG are two different names for the same file extension. You can choose one of these two names in the drop-down menu of the software.
- Maybe use some other program – open the image in your favorite software, if not sure, try double click to check the default option on your computer.
- On some versions of the software, you need to “Copy” (make a copy) the file first and then “Save” the copy in the new format.
- Rename the file or file location if desired, for example you can save the file on the desktop for easy access.
- If the extension you want to convert is not in the drop-down menu, try using another editing software (e.g. Photoshop) or try a different method.
- The “Preview” software (and some others) can convert multiple files – just highlight the file you want to convert and right-click to see the options. [1] X Research Source
Use software to change image format
- For example, a search for “doc to pdf” or “jpg to gif” will bring up several free online converters.
- Be wary of sites that ask for fees or personal information to convert files – keep in mind that there are many free services, you don’t need to provide too much information other than an email address.
Convert image format on phone
Change file extension manually
- Computers use the file extension as shorthand to understand what software you must use to open the file. Be careful when changing file extensions yourself and always back up before doing so. [2] X Research Source
- This method may reduce image quality. You should use photo editing software. [3] X Research Sources
- For more detailed information about file extensions and how to display them, you can refer to the article Change file extensions.
- For example, if the file name is “myimage.png” you can rename it to “myimage.jpg”, from now on your computer will treat this as a “.jpg” file.
Advice
- File extensions are case-insensitive, although the general convention is to write them in lowercase.
- .jpg and .jpeg are the same format, which can be used interchangeably on modern operating systems. The difference comes from the convention on some operating systems that only allow 3 character extensions. [4] X Research Sources
Warning
- DO NOT overwrite the original image – always back up the image before manipulation or select “save as” a new file to make a copy.
Things you need
- Image file for format conversion
- Computer
- Image editing software (Paint, Preview, Photoshop, etc.)
This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 10,816 times.
On a computer, image files will have many different extensions (also known as file extensions). The file format determines the software you use to open or edit the file, and the file extension (the part after the “.”) determines the image format. When working with images, sometimes we need to convert files to a new format, so learning some ways to approach this problem is also essential! JPEG (similar to the JPG format) is a popular image extension that you’ll probably want to use.
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