Many websites and apps only allow you to upload photos if they end with the.jpg" />
Steps
Method 1 of 5: Use Paint on Windows

Step 1. Open Paint
Paint is already preinstalled on your PC. Press ⊞ Win + S to open the search box, then type
paint
. When you see Paint appear in the results, click on it.

Step 2. Open your image in Paint
Check that the image is on your computer. Click on the menu File and select To open. Locate your image and click OK.

Step 3. Click File, then click the arrow next to Save As
A list of image formats will appear, including the JPEG option.

Step 4. Click JPEG
This will launch a new window allowing you to choose a folder, rename the file and verify that the Save as is set to Jpeg.

Step 5. Rename the file if desired, then click Save
Your file has been converted.
Method 2 of 5: Use a web converter on a computer, smartphone, or tablet

Step 1. Choose a web converter
This method works for any computer connected to the web, including smartphones and tablets. Search online at convert XXX to.jpg" /> (Where XXX represents the file format you want to convert) to cycle through the options. Sites like Online-Convert contain lists of all the file formats that the program can convert.
- Verify that the site you choose can support your file format. Some image formats, such as RAW files, are more difficult to convert online due to their large size.
- If you're using a mobile device, use a Wi-Fi connection instead of a mobile data connection. Image files can be large.

Step 2. Upload your image
In your converter, find the button Choose file and locate the file you would like to convert. Many converters limit the size of the files to be converted.
- Before uploading your file, read the terms of use.
- Some converters allow you to enter a URL, which is great if your image is on the net.

Step 3. Make sure the converter is ready to convert your file to a JPEG file
Most converters have a drop-down menu or a button that allows you to select Jpeg Where JPG (these two options do the same). Some converters also allow you to change the size and quality of the file.

Step 4. Convert the image
Find the button Convert Where Save in order to start the conversion. It may take several minutes. The image can be downloaded automatically to the default download location or you will have to choose its location. Once the process is complete, your image is converted to JPEG.
Method 3 of 5: Use Preview on a Mac

Step 1. Open your image with Preview
Preview is already installed on your Mac. This program can open just about any type of image. Press Ctrl while clicking on the image and select Open with. Choose Preview.
- If you end up with an image format that you can't open or gives an error in the program, try using an online converter or Gimp
- For this method to work, the image must be saved on your computer. If you haven't downloaded the image to your computer yet, this is what you need to do first.

Step 2. Click on the File menu and select Export
A box containing several menus will appear.

Step 3. Change the format to JPEG
You could also adjust the quality and resolution. The higher the quality or resolution, the more space the image will take up on your hard drive.

Step 4. Rename the file and save
Check that your file name ends with .jpg (case doesn't matter), then select a save location that you'll easily remember. Click on To safeguard in order to complete the conversion.
Method 4 of 5: Use Gimp on a PC, Mac, or Linux System

Step 1. Get Gimp
If you're trying to convert an image format that isn't supported on your initial software, or just want a more robust option, you should know that Gimp is a very popular free option. If you don't already have Gimp, download and install it.

Step 2. Open the image you want to convert
Click on File, then on To open. Select the image and click again on To open.

Step 3. Click File, then Export As to choose the JPEG file format
A dialog box in which you can choose several options will appear. Click on Jpeg.

Step 4. Change your options
A new dialog box containing options for your JPEG will appear. Check the box next to Show preview in Image window to adjust the picture quality. Move the cursor to where your image looks best in the preview.

Step 5. Click Export
A window asking you to choose a new file name and location will appear. Find a folder you will remember and give the file whatever name you want. The file name already contains .jpg at the end and you must leave this part as is (the extension is not case sensitive). Click on Save in order to complete the conversion.
Method 5 of 5: Change the file extension

Step 1. Understand what changing the file extension means
If you have a JPEG file with the wrong file extension, for example if there is a typo and the file ends with .JGP instead of .jpg, this method will be useful. On the other hand, it does not technically convert an image into JPEG format.
- If your image file is not already a.jpg" />
- File extensions are not case sensitive. .jpg and .jpg represent the same thing.
- Before you start, write down the original extension so that you can replace it later if necessary.

Step 2. Find your file
It could be on the Desktop or in a separate folder that you can access through Finder or Windows Explorer.

Step 3. Make the file name editable
If you are using Windows, you can skip this step. Mac users should click once on the image, click File, then on Get the information. Click the arrow next to Name and extension and remove the check mark next to Hide extension. Click on Save.

Step 4. Remove the current file extension
Erase anything after the.
(period) in the filename.
- On Mac, click the image once and press Return. Click at the end of the file extension and press Clear until you've erased everything after the period.
- On Windows, right click on the image and select Rename. Click at the end of the file extension and press ← Backspace to remove anything after the period.

Step 5. Type
JPG
after the point.
You can write it in uppercase or not, it doesn't matter. The name of the file should look something like:
image.jpg
. Press Enter or Return.

Step 6. Confirm your change
Whether you are on a Mac or a PC, you will receive a warning that changing the file extension may render the file unusable. Click on Use.jpg Where Yes if you want to confirm the change. Your file name will now end with.jpg.
Advice
- JPEG files can end in.jpg" />
- Always save your images before editing them.
- When uploading or downloading images, mobile data rates apply.