and deleted once the download link expires.
Resize Images Online, Free
This image resizer lets you change the dimensions of any JPG, PNG or WebP image — by exact pixels or by percentage. It is perfect for social posts, thumbnails, profile pictures and product images. Upload in the tool above and download your resized image instantly.
How to Resize an Image
- Upload your image.
- Enter a new width/height in pixels, or scale by percentage.
- Download the resized image.
Common Image Sizes
- Instagram post: 1080 × 1080 px
- YouTube thumbnail: 1280 × 720 px
- Facebook cover: 820 × 312 px
- Profile picture: 400 × 400 px
Resize Without Losing Quality
For the sharpest result, start with the highest-resolution original you have and scale down rather than up. Enlarging a small image can look blurry; reducing a large one keeps detail crisp.
Pixels or Percentage: Which Should You Use?
Use pixels when the destination tells you the exact size it wants, such as a 1280 × 720 thumbnail or a 400 × 400 profile photo. Use percentage when you only need the file to be smaller and the exact numbers do not matter. Scaling a 4000 × 3000 phone photo to 50% gives you 2000 × 1500, which is still sharp on any screen and roughly a quarter of the original file size.
Keep the Shape of Your Image
Every image has an aspect ratio, which is the relationship between its width and height. A 4000 × 3000 photo is 4:3. If you type in a width and height that do not match that ratio, the picture gets stretched or squashed. To avoid that, work out the second number from the first. For a 4:3 photo at 1200 pixels wide, the height is 1200 ÷ 4 × 3 = 900. If the destination needs a different shape, such as a square, crop the image first and then resize it.
What Size Do You Actually Need?
- Blog or website content image: 1200 to 1600 px wide is plenty for most layouts.
- Full-width hero image: 1920 to 2400 px wide.
- Online store product photo: 1000 to 2000 px on the longest side, so zoom still works.
- Email attachment or newsletter image: 600 to 800 px wide keeps messages light.
- Printing: multiply the print size in inches by 300. A 6 × 4 inch print needs 1800 × 1200 px.
Resizing Is Not the Same as Compressing
Resizing changes how many pixels the image has. Compressing keeps the pixel count and stores those pixels more efficiently. For the smallest file, do both in that order: resize to the dimensions you need, then run the result through the image compressor. Compressing a huge image without resizing it first leaves most of the savings on the table.
Common Resizing Mistakes
- Enlarging a small image. The tool has to invent pixels that were never there, so the result looks soft. Go back to a larger original if you can.
- Resizing the same file over and over. Each save of a JPG loses a little detail. Always resize from the original, not from an earlier resized copy.
- Overwriting the original. Keep the full-size file somewhere safe. You cannot get those pixels back later.
Frequently Asked Questions
How do I resize an image?
Upload your image to the tool above, enter the new dimensions in pixels or a percentage, and download the resized file.
How do I resize an image without losing quality?
Start with a high-resolution original and scale down. Reducing size keeps detail sharp, while enlarging a small image can look blurry.
Can I resize multiple images at once?
Yes, many resizing jobs can be done quickly one after another, free and with no signup.
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