Are files uploaded to a server?
No. The input file bytes are processed inside your browser. Some tools download their JavaScript libraries from public CDNs, but the files themselves are not uploaded.
Resize images online
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About this tool
Resize images online without uploading
Enter a target width or height, optionally rotate, flip or add a watermark, and export a fresh image. Aspect ratio is preserved for ordinary resizing.
Before you start
Large original photographs may use substantial memory. Try resizing them before making multiple additional conversions.
Do I need an account or a paid plan?
No. The current version is free, has no registration and runs on devices with a compatible modern browser.
Can I resize without stretching my image?
Yes. Ordinary resizing preserves the original aspect ratio. You can also rotate, flip and add a watermark before downloading.
Resize for the destination, not for an arbitrary number
Pixel dimensions describe how many samples an image contains; they do not by themselves specify the physical print size or how large an image will appear on every screen. For websites and messaging, reducing dimensions can cut file size substantially because fewer pixels need to be stored and decoded. For print, the receiving printer or service may also specify resolution or physical dimensions.
Preserving the aspect ratio prevents unintended stretching. If a required size has a different shape from the original, cropping is usually preferable to squeezing the image. Rotating or flipping changes orientation but does not create extra resolution, so start from the highest-quality source you have when preparing an important output.
Practical checks
- Keep aspect ratio locked unless distortion is intentional.
- Resize from the original rather than repeatedly resizing previous exports.
- Check the receiving website or service for exact pixel requirements when they matter.
Practical walkthrough · image resizer
Fit a photograph into a 1200-pixel-wide content area
Example task: A very large source photograph is intended for a page that displays it at around 1200 pixels wide.
Try this workflow
- Choose dimensions that preserve the image’s aspect ratio.
- Resize and compare fine details, especially faces or printed text.
- Download and check the dimensions of the actual output.
What to expect
Downscaling reduces pixel dimensions and can make large images more manageable for sharing.
When to take extra care
Stretching to a different aspect ratio distorts subjects. Enlarging a small image through conventional resizing does not recover missing detail.