Image Tools

Resize by Percentage

Scales an image to a percentage of its original width and height, from 10 to 200 percent, keeping its proportions. The percentage is applied to the image's own size, so you do not need to know its pixel dimensions.

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Process

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Up to 1 files

Resize: 50%

Shrinking

How to Use

1Add one image in the drop area.
2Drag the Resize slider to the percentage you want. The label under it reads Shrinking, Upscaling or Original size.
3Click the button, which reads Resize to followed by your percentage (for example Resize to 50%).
4Download the resized image.

About this tool

Updated September 19, 2026

Scaling relative to what you started with

The slider runs from 10% to 200% of the image's original dimensions, and both sides are scaled by the same factor so nothing is stretched.

Setting 50% halves the width and the height, which leaves a quarter of the original pixel count — worth remembering, because halving the dimensions sounds like halving the image but removes three quarters of it. The percentage always refers to the original file you added, not to the result of a previous run, so there is no compounding to keep track of. Every image in a batch is scaled by the same percentage rather than to the same final size.

Why a percentage beats exact dimensions here

It is the right tool when your images have different sizes and you want them all reduced by the same amount.

Fixed dimensions force every image into one shape, which either distorts them or crops them. A percentage preserves each image's own proportions and relative size, so a batch of mixed photos stays consistent with itself. That makes this the natural choice for shrinking a folder of camera images before emailing them. When you do need one exact size, for a profile picture or a banner slot, use Image Resizer instead.

Going above 100% has limits

Upscaling to 200% adds pixels by interpolation. It cannot add detail that was never captured.

The browser smooths between existing pixels to fill the larger grid, so edges soften and fine texture blurs rather than sharpening. It is genuinely useful when something must meet a minimum pixel requirement and slight softness is acceptable. It will not rescue a small, blurry image, and it will not recover a face from a distant crop. If quality matters, it is always better to find a larger original than to enlarge a small one.

Shrinking is a one-way trip

Pixels removed on the way down cannot be restored by scaling back up, so keep the original.

Reducing to 25% and then enlarging that result to 400% does not return you to where you started; it returns a soft approximation. Work from the original file each time you need a different size, and save the reduced copies under new names. This also matters for photos you may want to print later, where the full resolution is the thing that makes printing possible at all.

Features

Single slider from 10 to 200 percent, starting at 50
Both width and height are multiplied by the percentage and rounded, so proportions are unchanged
Shrinks in gentle halving steps for big reductions to keep edges cleaner than a single jump
The action button shows the chosen percentage
Saved in the original file's format at high quality (about 95 percent for JPEG and WebP)
One image per run; runs in your browser with no upload

FAQ

Is 50 percent half the file size or half the dimensions?

Half the dimensions: width and height are each halved, so the pixel count drops to about a quarter. File size usually falls noticeably too, but not by an exact amount because it depends on the format and image content.

Does upscaling to 200 percent add detail?

No. Enlarging only interpolates existing pixels, so the picture gets bigger but not sharper. Use it for fitting a slot, not for recovering detail.

Can I set an exact pixel size instead?

Not on this page, which only offers a percentage. For exact dimensions use the Image Resizer, or use the Aspect Ratio Converter if you also need a specific frame shape.

Can I choose the output format or quality?

No. The output keeps the source format, worked out from the file extension, at a fixed high quality. To change format afterwards, use the Image Converter, or the Image Compressor for a smaller file.

Image Resizer

Resize up to 50 images to set pixel dimensions with contain, cover or stretch modes.

Image Compressor

Reduce an image's file size with a quality slider, output format choice and optional max dimensions.

Aspect Ratio Converter

Change an image to 1:1, 4:3, 16:9, 3:2, 9:16 or 2:3 by cropping or padding.