The Resize Image by Percentage tool scales a photo up or down by a percentage — the easy way to shrink or enlarge an image when you do not need exact pixel dimensions. Pick a preset like 50%, drag the scale slider, or type any percentage, and the tool resizes the image and lets you download it in the format and quality you choose.
It loads with a sample image so you can see exactly how it works straight away — adjust the scale and watch the output resolution and estimated file size update live. When you are ready, upload your own image (or drag and drop it) and download the resized result. Everything runs in your browser, so your photo is never uploaded to a server.
How to resize an image by percentage
- Upload your image, or drag and drop it onto the preview (a sample is shown until you do).
- Choose a preset (25%, 50%, 75%, 200%) or set any custom percentage with the slider or the number box.
- Pick an output format and, for JPEG or WebP, a quality level — the estimated file size updates as you go.
- Check the new output resolution, then download the resized image.
Scaling down vs scaling up
Scaling below 100% makes the image smaller, which reduces both its dimensions and its file size — useful for email attachments, faster web pages, or fitting an upload limit. Scaling above 100% enlarges it, but remember that enlarging cannot add detail that was not captured: a small image blown up will look softer, so upscaling is best kept modest.
Choosing a format and quality
“Keep original” exports in the same format you uploaded. JPEG and WebP are best for photographs and let you trade quality for a smaller file with the quality slider; WebP usually produces the smallest file at a given quality. PNG is lossless and best for graphics, screenshots, or images that need transparency, but the files are larger. The estimated size shown updates with your choice so you can balance size against quality before downloading.
Just need the numbers?
You do not have to upload anything to work out a resized size. The output resolution always shows the original dimensions and the scaled result, so you can read off the new width and height for any percentage even without an image loaded — handy when you just need to know what, say, a 90% scale of a given size works out to.
Frequently Asked Questions
How do I resize an image by percentage?
Upload your image, then pick a preset percentage or set a custom scale with the slider or number box. The image is resized instantly and you can download it. A sample image is shown so you can try it before uploading.
Does resizing reduce the file size?
Scaling below 100% reduces the dimensions and usually the file size too. You can reduce it further by choosing JPEG or WebP and lowering the quality — the estimated file size updates as you adjust these.
Can I enlarge an image without losing quality?
You can scale above 100%, but enlarging cannot add detail that was not in the original, so a heavily upscaled image will look softer. Modest enlargement is usually fine; large increases are best avoided.
Which output format should I choose?
Use JPEG or WebP for photographs (WebP is usually smallest for a given quality), and PNG for graphics, screenshots, or images needing transparency. “Keep original” exports in the format you uploaded.
Is my image uploaded to a server?
No. All resizing happens locally in your browser using the canvas, so your image never leaves your device.