Resize Image by Percentage
Resize
Saves the edited image at its current dimensions. JPG, PNG, and WebP keep their format; other supported inputs download as JPG. Check the downloaded file for final quality.
Your images are processed locally in your browser and never uploaded to any server.
Scale one image proportionally by percentage: 50% to halve its dimensions, 25% for a smaller version, or 200% to double them. Choose a quick preset or use the 10–200% slider, then apply the resize and download the result. Everything runs locally.
Percentage scaling is useful when you do not have an exact target in mind but know the image is roughly twice or four times larger than needed. The same factor applies to width and height, rounded to whole pixels. Check the resulting dimensions against the intended display size before applying. To resize another photo, open it separately and repeat.
How to use the resize by percentage
- Add one image.
- Choose a percentage preset or use the slider from 10% to 200%.
- Click Apply resize to scale both dimensions proportionally.
- Check the preview, then click Download to save the scaled image.
How percentage maps to file size
Pixel count scales with the square of the percentage. Halving both dimensions to 50% leaves a quarter of the pixels; scaling to 25% leaves about a sixteenth. Those fractions describe pixels, not bytes. The downloaded file size also depends on its format, image content and encoding, so a 50% scale does not guarantee a 75% byte saving.
Downscaling removes pixels and source detail. A 4000px-wide photo resized to 50% may still look good at a 2000px display size, but fine textures or text can lose clarity. Keep the original and inspect the preview. Percentages above 100% enlarge the existing image through interpolation; they do not recover detail, even within the 200% slider limit.
Frequently asked questions
What percentage should I use?
Choose it from the target dimensions: 50% turns a 4000px-wide photo into 2000px; 25% gives 1000px. Neither is a universal web or thumbnail size. Check the displayed output dimensions and allow for screen density.
How does percentage relate to file size?
Pixels scale by the square of the percentage: 50% dimensions means 25% of the pixels. Two halvings leave one sixteenth of the pixels, not necessarily one sixteenth of the bytes. Format, content and encoding determine the file size.
Can percentages exceed 100%?
Yes. The slider runs from 10% to 200%, with values above 100% enlarging the image. Upscaling may look soft and cannot restore missing detail. Downscaling discards source detail too, though the result may look good at a smaller display size.