How to use the image resizer
- Click "Choose an image" and select a file from your device.
- Enter a target width or height in pixels, or fill in both.
- Leave one box empty to keep the original aspect ratio automatically.
- Click "Resize Image", review the new dimensions, then download the result.
Keeping the aspect ratio
If you type only a width, the height is calculated from the original proportions so the image is never stretched. If you type only a height, the width is calculated the same way. When you fill in both boxes, the image is resized to exactly those dimensions — useful when a platform demands a precise size, but be aware this can distort the image if the ratio does not match.
Why resize images?
Social platforms, marketplaces and content management systems often require specific dimensions for covers, avatars and product photos. Uploading an oversized image wastes bandwidth and can be rejected or cropped badly. Resizing before you upload gives you control over the final result instead of leaving it to an automatic cropper.
Common image sizes
| Use | Typical size (px) |
|---|---|
| Social media post | 1080 x 1080 |
| Facebook cover | 820 x 312 |
| YouTube thumbnail | 1280 x 720 |
| Passport-style photo | 413 x 531 |
Upscaling vs downscaling
When you reduce an image's dimensions, you are removing pixels, which is quick, safe and usually invisible at normal viewing size. When you increase dimensions, the browser has to invent new pixels by interpolating between existing ones, which can introduce softness. For the sharpest results, resize down rather than up.
Resizing for social media
Every platform has its own preferred dimensions, and they change over time. Before uploading, check the current recommended size for the platform you are targeting. Resizing to the exact dimensions stops the platform from cropping or compressing your image in unpredictable ways.
What happens to the file format?
The resized image is exported as a PNG. PNG is lossless, so your resized image keeps its sharpness. The trade-off is a larger file than a JPEG of the same dimensions. If you need a smaller file for the web, run the result through our Image Compressor.