Using Preview on iOS

Before altering the image, make a copy of the original file as this process is permanent.

1. Open the desired image file using the Preview application.
2. In the menu bar at the top of the screen, select Tools, then Adjust Size.
3. A window should appear. On the right side of the window, click the box that states pixels and select your desired measurement.
4. There should be three text fields along the left side of the window labeled Width, Height, and Resolution. Type in your desired values.
5. When you're finished, select OK.
6. Finally, remember to save the file before closing it.

Using MS Paint on Windows

1. Open MS Paint - it’s preinstalled Windows software.
2. Drag and drop your image in Paint. Or use Menu and Open to import it.
3. Click on button "Resize" on home tab.
4. A "Resize and Skew" modal will open.
5. Click on "Maintain aspect ratio". If you don’t choose it your picture might get stretched.
6. Choose Percentage or Pixels and write the desired dimensions in the fields. It’s enough to write just the horizontal dimention and vertical will be calculated based on original ratio.
7. Click OK.
8. Save the picture.

Other methods

Alternatively you can use any of these options:

• Photoshop
• Gimp
• Online free picture editing tool Pixlr
• MS Photo Gallery
• PhotoScape
• or any other software you know to resize your image.