Buzz
You may need to resize a JPEG file when you want to send multiple images via email or upload them to a website. Resizing the image will slightly reduce its quality, and enlarging the original image may cause it to blur. You can resize images using online tools, computer editing software, or mobile apps, all of which are free of charge.
Steps
Using an Image Resize Website
Visit an image resizing website. There are numerous websites that allow you to upload and adjust image sizes quickly, including JPEG format. Search for "resize jpeg" to discover different results. Online tools are best used on a computer, not recommended for mobile devices. Here are some popular websites:
- picresize.com
- resizeyourimage.com
- resizeimage.net
Upload the JPG image you wish to resize. Most websites provide a straightforward method for uploading images. Click on "Choose file", "Upload image", or "Browse" to locate the image file on your computer that you want to resize.
- If the image you want to resize is on another website, simply download it to your computer and then upload it to the resizing website.
Use the resizing control to adjust the image size. Each website features a different resizing interface. You can click and drag, drop a box, or use a slider to adjust the size. You may also manually enter the exact dimensions you need in the appropriate fields.
- Enlarging the original image size will significantly reduce the quality.
Select the compression level (if available). Some resizing websites offer an option to select the compression level. The higher the compression, the smaller the file size, but it will degrade the image quality. Look for a quality slider or dropdown menu to adjust the final quality. Not all websites provide this option.
Download the resized image. After setting the size and quality, you can download the resized image. Click the "Resize" button to save the new image. You'll see a preview of the image before downloading it.
- When downloading the resized image, be sure not to overwrite the original. Keeping the original lets you make further edits if you're not satisfied with the result.
Using Paint on Windows
Create a copy of the image file. Before resizing the image in Paint, create a copy so you don't affect the original file. By keeping the original, you can make further adjustments if you're not satisfied with the result.
- To create a copy, right-click on the image and select "Copy". Then right-click in an empty area of the same folder and choose "Paste" to create a copy of the image.
Open the image in Paint. Paint is a free image editing software pre-installed on all Windows computers. Right-click the image and select "Edit" to open the file in Paint.
Select the entire image. If you wish to resize the whole image, select it all by pressing Ctrl+A. You can also click on the "Select" button in the Home tab and choose "Select all". A dotted line will appear around the edges of the image.
Click on the "Resize" button. You can find this button in the Home tab, or press Ctrl+W. This action opens the "Resize and Skew" window for adjustments.
Use the "Resize" field to adjust the image size. You can choose to resize by percentage or pixels. If you select "Pixels", you can enter the exact dimensions you want. Or, enter a percentage greater than "100" to enlarge the image.
- By default, Paint will maintain the aspect ratio, so if you input a value in one field, it will automatically calculate the other field. This ensures that the image won’t be stretched or distorted during resizing. You can uncheck "Maintain aspect ratio" if you want to manually enter both Horizontal and Vertical fields.
- Enlarging the image will cause it to appear blurry.
Click "OK" to apply the resized image. Once you click "OK", the image will resize based on the values you entered. There is no preview feature, so you need to apply the changes to see the result.
- If you're not satisfied with the outcome, press Ctrl+Z to undo the resize. You can also click the "Undo" button located at the top of the page.
Drag the edges to fit the resized image. The image will resize, but the edges will remain at their original dimensions. Click and drag the bounding box around the edges to adjust the size and eliminate any empty white space.
Save the resized image. Once you're satisfied with the new size, save the file. Select "Save As" from the File tab and choose "JPEG picture". You can then name the file and select where to save it.
Using Preview on Mac OS X
Create a copy of the image file. It's a good idea to back up the original image before resizing. This way, you can make adjustments later if you're not happy with the result. Select the image, press ⌘ Command+C and ⌘ Command+V to create a copy in the same folder.
Open the image in the Preview application. Typically, you can just double-click the image to open it in Preview by default. If the image opens in another application, right-click and select "Open With" and then choose "Preview".
Click the Tools menu and select "Adjust Size". This will open a new window that allows you to adjust the size of the image.
Click the drop-down menu to select the unit of measurement you want to use. You can choose "Pixels", "Percentage", or other image measurement units. Selecting "Pixels" lets you set the exact dimensions for the image after resizing.
Enter the new width and height for the image. These two fields are linked, so when you change one value, the software will automatically calculate the other. This ensures the image is not stretched or distorted. If you want to adjust both fields independently, uncheck "Scale proportionally" to unlink the two fields.
Check the new file size. You can see the new file size at the bottom of the window before applying any changes. This is useful if you need to resize the image to meet upload limits for email or other storage services.
Click "OK" to apply the changes. The image will be resized according to your settings. If you’re not satisfied with the result, press ⌘ Command+Z to undo the changes and revert to the original size.
Save the file. Once you are happy with the new image size, you can save the file. Click the "File" menu and select "Save" to keep the changes.
Using iPhone, iPad, or iPod Touch
Install an app that allows you to resize the image. The default iOS devices do not include an image resizing feature, but you can use third-party apps to do this task. These apps are available on the iOS App Store. Here are some popular apps:
- Resize It
- Image Resizer+
- Desqueeze
Open the app and select the image you want to resize. The app will ask for permission to access your photos. This is required so that the app can access your device’s photo storage. Locate the image you want to resize and open it.
Click the 'Resize' button. Most applications offer a variety of tools, including one for resizing images. Press the 'Resize' button to begin the resizing process.
Enter the new image size. Different applications may present different interfaces, but you can either choose from preset sizes or manually input the desired resolution. The width and height are typically linked together to maintain the image's aspect ratio.
- If you're not concerned about distorting or stretching the image, you can click the chain link or padlock icon to input different values for each dimension.
Save the resized image to your camera roll. Once you've adjusted the image's dimensions, click the 'Save' button to store the resized image in your camera roll. You can later access it in the Photos app, just like any other image on your iOS device.
Using an Android device
Download an app to resize images. Android devices lack built-in tools to adjust image sizes, but there are numerous third-party apps available to perform this task. You can find these apps in the Google Play Store, usually available for free. Some popular apps include:
- Photo & Picture Resizer
- Resize Me!
- Image Shrink
- Reduce Photo Size
Open the app you just downloaded and grant it access to your photo library. The first time you launch the app, you'll be asked to allow it to access the photos stored on your device. This step is essential for the app to retrieve images from your storage.
Open the image you wish to resize. Use the app to navigate to the image you want to resize. The process may vary slightly depending on your device, but typically, you'll select 'Select photo' from the main menu to open the photo stored on your device.
Choose the resize tool. After opening the image, select the 'Resize' tool within the app. The steps to do this may vary depending on the device you're using.
Select the new image size. You'll see the original size displayed in pixels and file size. Depending on the app, you can either choose a preset size or manually adjust the dimensions. If you choose to customize, entering just one value will automatically calculate the other dimension to maintain the aspect ratio.
Save the resized image. Depending on the app, the image might be saved automatically, or you may need to click the 'Save' button. The original image will remain unchanged.
Locate the resized image. Different apps store resized images in various locations. Typically, you can find the image by opening the Pictures folder and accessing the subfolder named after the app. Alternatively, you can share the image just like any other photo saved on your device.
Warning
- Image quality will significantly decrease if you enlarge it. It is recommended to only reduce the size of the image. Enlarging the image stretches the pixels, resulting in a blurry and poor-quality image.
