Resize images online to the width and height you need
Make a photo fit a website, invitation layout or upload field with specific pixel requirements. Enter a width or height with the aspect ratio locked to preserve proportions. Percentage shortcuts quickly reduce the original dimensions. Unlock the ratio only when you intentionally want to change the image proportions.
How to use the image resizer
Open your file
Open the image you want to resize.
Choose your settings
Enter the target width or height, keeping aspect ratio locked for proportional resizing.
Save your result
Choose a file format and download the resized image.
- Exact pixel dimensions
- Aspect ratio lock
- 25%, 50% and 75% shortcuts
- Format conversion
- Live preview
When this tool is useful
Meet an online form’s dimensions
Read the form’s pixel requirements, then enter the required width or height. A dimension requirement and a file-size limit are different; you may need to compress the resized image as well.
Prepare a website photo
A photo displayed at 800 pixels wide may not need a 4000-pixel original. Reducing the dimensions avoids sending unnecessary pixels while preserving a proportional composition.
Make a smaller copy for sharing
Use the percentage shortcuts for a quick reduction. The 50% shortcut halves both width and height, producing one quarter as many pixels as the original.
Choose the right settings for your file
| Option | Use it for | What to know |
|---|---|---|
| Aspect ratio locked | Proportional resizing | A 1600 × 1200 image becomes 800 × 600 when you set its width to 800. |
| Aspect ratio unlocked | An intentional change in proportions | Entering a different ratio stretches the picture; use cropping when that is not intended. |
| Percentage shortcuts | Quick reductions from the original | 25%, 50% and 75% use the uploaded image dimensions as their starting point. |
Frequently asked questions
Practical answers about files, output and what this tool can do.
Will resizing make a small image sharper?
Increasing pixel dimensions cannot restore missing detail. Start with a larger original when you need a sharp print or high-resolution result.
Can I resize without changing the shape?
Yes. Keep Lock aspect ratio enabled. Changing one dimension automatically updates the other.
What is the difference between resizing and compressing an image?
Resizing changes pixel dimensions. Compression changes how the image data is encoded, often by reducing quality. Both can reduce file size, and you can combine them.
Can I resize an image to 600 × 600 pixels?
Yes. Unlock the aspect ratio and enter 600 for each dimension, but this stretches non-square images. For a proportional square result, crop the photo in Image Editor first.
Your files stay on your device
These tools process your files in your browser without uploading them to a file-processing server. You do not need an account or an OpenAI service. Keep your original file and review the download before sharing it. Read our privacy policy for information about the website's standard analytics.