In this article, we'll show you how to reduce or increase the size of an image file (pictures, images, photos), measured in kilobytes (KB). To immediately change the size in kilobytes, use the free online service LunaPic. To change the size in kilobytes by changing the size of the picture in pixels or centimeters, use free programs in Windows or Mac OS X, as well as free applications on iPhone or Android. Remember: when you decrease the size of the graphic file, the resolution of the picture will also decrease, and increasing the size will not lead to an increase in the resolution (the picture will become "pixelated").
Steps
Method 1 of 5: LunaPic Online Service
Step 1. Go to https://www140.lunapic.com/editor/ in your web browser
LunaPic is a free online photo editor that allows you to resize photos in kilobytes.
Step 2. Click on Quick Upload
This link is on the right side of the page.
Step 3. Click Browse
You will find this gray button in the center of the page. An Explorer or Finder window will open.
Step 4. Select the image you want to resize
To do this, in the Explorer or Finder window, find and click on the desired picture or photo. If necessary, go to the folder with the image: to do this, click on it in the left pane.
Step 5. Click on Open
You will find this button in the lower right corner. The photo will be uploaded to the LunaPic website.
Step 6. Click Set File Size
You will find this option in the list of options above the uploaded image.
Step 7. Enter the file size in kilobytes
Double click on the text field with a number above the loaded image - the number will be highlighted. Now enter the new file size.
To increase the size, enter a larger number (than the number in the text box). And vice versa
Step 8. Click Resize File
This gray button is to the right of the number field (the new size in kilobytes). The size of the graphic file and the size of the picture will be changed.
Step 9. Click Save
You will find this option on the left side of the page. The picture will be saved as a JPEG file.
- If necessary, scroll down the page to find the “Save” option.
- You can also tap Facebook, Imgur, Pinterest, Google Photos, or Twitter to post an image to one of these services.
Method 2 of 5: Windows
Step 1. Open the Start Menu
Click on the Windows logo in the lower left corner.
Step 2. Enter paint
This will search for Paint.
Step 3. Click on Paint
It's at the top of the Start menu. Paint starts up.
Step 4. Open the picture in Paint
For this:
- click on "File" in the upper left corner;
- click "Open" to open the file browser;
- click on the desired image;
- click "Open" in the lower right corner.
Step 5. Click Resize
This option is marked with a rectangle icon and is located on the toolbar (at the top of the window) under Image. The Resize and Skew window appears.
Step 6. Install
y "Maintain Aspect Ratio".
It's at the bottom of the window. This will prevent the picture from stretching vertically or horizontally when it is resized.
Step 7. Enter the new dimensions for the picture
Use one of the following options:
- Check the box next to the "Percentage" option. Now enter a number (as a percentage) in the Horizontal or Vertical box.
- Check the box next to the Pixels option. Now enter a size in pixels (for example, 800 x 600) in the Horizontal field or in the Vertical field.
Step 8. Click OK
You will find this button in the lower right corner. The picture will be resized.
Step 9. Save the file
For this:
- click on "File" in the upper left corner;
- click "Save As" in the menu;
- in the line "File name" enter a new file name;
- click on "File Type" (optional);
- choose one of these formats:
- GIF - suitable for web graphics. A small file will be created.
- BMP - suitable for web graphics. A small file will be created.
- Jpeg - suitable for photos published on the Internet. A small file will be created.
- Tiff - suitable for images that need to be stored and edited. A large file will be created.
- click "Save".
Method 3 of 5: Mac OS X
Step 1. Open Finder
Click on the blue and white face icon in the dock (at the bottom of the screen).
Step 2. Find the photo you want to resize
To do this, in Finder, go to the folder with the photo. Use the left pane to open shared folders.
Step 3. Open the photo in the Viewer program
It is the main program for viewing pictures in Mac OS X. To open a photo in Preview, simply double-click on it. If Viewer is not your main image viewer, follow these steps to open a photo in Viewer:
- right click on the image. If you are using a Magic Mouse or trackpad, click with two fingers;
- click "File";
- click on "Open with";
- click View.
Step 4. Open the Tools menu
You will find it in the menu bar at the top of the screen.
Step 5. Click on Customize Size
It's in the Tools menu.
Step 6. Select a unit of measure
Open the menu next to the "Height" and "Width" fields, in which the "Percentage" option is selected by default. In this menu, you can select the options "Pixels", "Inches", "Centimeters" and others.
Step 7. Enter a new number in the "Width" or in the "Height" field
Use any of these fields to resize the image. If you selected the Percentage option, specify the percentage by which the image will be resized. If you selected the option "Pixels", "Inches" or another, enter the number that will be the new size of the picture.
- Check the box next to "Scale proportionally" so that the image is not distorted when it is resized.
- You can also open the menu at "Fit In" and select the size of the image to quickly resize it.
Step 8. Click OK
This button is in the lower right corner. The photo will be resized.
Step 9. Open the File menu
It's in the menu bar at the top of the screen.
Step 10. Click Save
This option is located on the menu. The file will be saved on your computer with the new dimensions.
- To save the picture in a different format, open the "File" menu, click on "Export", click "Format" and select one of these formats:
- Jpeg - suitable for photos published on the Internet. A small file will be created.
- JPEG-2000 - a small file with excellent picture quality and high compression will be created.
- OpenEXR - suitable for compressing video files.
- Tiff - suitable for images that need to be stored and edited. A large file will be created.
Method 4 of 5: iPhone
Step 1. Install the free Resize Image app from the App Store
For this:
- launch the App Store;
- tap "Search";
- click on the search bar;
- enter resize image;
- tap "Find" on the keyboard;
- scroll down the search results to "Resize Image".
- tap "Download" next to "Resize Image";
- click on the Touch ID sensor or tap "Install" and then enter your Apple ID;
- wait for the app to install.
Step 2. Launch Resize Image
Click "Open" in the App Store or click on the icon for this application on the home screen. The icon looks like a photo with a tree and clouds.
If Resize Image asks if you want to receive notifications, click Allow or Don’t allow
Step 3. Tap “Photos”
You will find this option in the lower left corner.
Step 4. Click Photo Library
The photos in the device memory are displayed.
Step 5. Tap an album
The photos stored in it will be displayed.
Step 6. Click on the desired photo
It will open in the main Resize Image window.
Step 7. Tap “Settings”
This option is marked with an icon that looks like sliders on a gray background at the bottom of the screen (to the right of the Photo icon). A window will open in the center of the screen.
Step 8. Resize the picture
To do this, drag the slider near "Width" or "Height" to the left to decrease the size of the photo, or to the right to increase the size.
- If the "Keep aspect ration" slider is green
-
Iphoneswitchonicon1 , the picture will not be distorted when it is resized.
- You can also click on one of the Standard Sizes tabs at the top of the window to quickly resize the image.
Step 9. Click Resize
You will find this option at the bottom of the window. The image will be resized.
If you receive a warning that resizing the picture will cause the application to crash, tap Yes
Step 10. Tap “Save”
This option is marked with a floppy disk icon at the bottom of the screen.
Step 11. Click on the chamomile icon
The modified picture will be sent to the "Camera Roll" album.
Step 12. Click Ok
The window in the center of the screen will close.
Method 5 of 5: Android device
Step 1. Install the free Photo Resizer HD app from the Play Store
For this:
- launch the Play Store;
- click on the search bar;
- enter photo resizer hd;
- tap “Photo Resizer HD”;
- click "Install";
- tap "Accept";
- wait for the app to install.
Step 2. Launch Photo Resizer HD
Click "Open" in the Play Store or tap the application icon on the home screen. This icon looks like four arrows on a blue background.
Step 3. Tap Gallery
You will find this option in the center of the screen. The Gallery application starts.
Step 4. Tap the photo you want to resize
The photo will open in Photo Resizer HD.
Step 5. Tap "Resize"
This option is marked with a diagonal arrow icon. A menu will open.
Step 6. Click Custom
You will find this option at the top of the menu.
Also in the list, you can choose one of the ready-made sizes to quickly resize the photo
Step 7. Enter the new image size in the text box
There are two boxes for horizontal and vertical dimensions. You can use any of these fields to resize the photo. Click on the text box and then enter the number you want. For example, if you see "300" in a field, replace that number with "150" to halve the file size. Enter "600" to double the file size.
Check the box next to "Keep aspect ratio" so that the picture is not distorted when its dimensions are resized
Step 8. Tap OK
You will find this button at the bottom of the menu. The image will be resized.
Step 9. Click on the icon that looks like a floppy disk and is located in the upper right corner
The modified photo will be saved in the Gallery application with the new dimensions.
Advice
- If you increase the size of the picture (for example, from 500 x 500 to 800 x 800), the file size will also increase (and vice versa).
- If you resize the file in Paint (Windows), the new size may not appear in Explorer. In this case, press the F5 key several times to refresh the Explorer window.