Can I resize by exact pixel dimensions and by percentage?

Yes, both methods are supported — enter an exact width and height in pixels, or scale by a percentage of the original size, whichever fits how you're thinking about the resize.

What does the aspect ratio lock do?

When locked, changing the width automatically adjusts the height proportionally (and vice versa) so the image doesn't appear stretched or squashed. Unlock it if you specifically want to change the width-to-height ratio.

Will resizing to a larger size actually add detail, or just stretch the image?

Enlarging an image beyond its original resolution doesn't add new detail that wasn't captured in the source — it interpolates existing pixel data to fill the larger size, which can look softer than a genuinely higher-resolution original.

Can I resize multiple images to the same dimensions at once?

Yes, batch resizing applies your chosen dimensions or percentage to every uploaded image, useful for standardizing a set of product photos or thumbnails to one consistent size.

Does resizing affect image quality?

Shrinking an image generally looks clean since you're reducing detail that's still present in the source. Enlarging can look softer, as mentioned above, since it's estimating new pixels rather than capturing new detail.

Is my image uploaded to a server?

No. Every operation runs locally in your browser using JavaScript and WebAssembly. Your image is never transmitted anywhere, which also means it works without an internet connection once the page has loaded.

Resize Image

Resize by exact dimensions or percentage, with an optional aspect-ratio lock.

Processed entirely in your browser — your file is never uploaded anywhere.

Why resize images with Tools Root

Different platforms enforce different dimension requirements — a profile photo needs to be square, a banner needs specific pixel dimensions, a thumbnail needs to be small and consistent across a whole gallery. Resizing gets an image to the exact size a destination requires.

Exact dimensions or proportional percentage

Whether you know the precise pixel size you need or just want to scale something down by half, both approaches are supported, with an aspect-ratio lock to prevent accidental stretching when you only mean to change one dimension.

Common use cases

Resizing a photo to meet a passport or ID photo's exact pixel requirements, standardizing product photos to one consistent size for an online store, shrinking a large camera photo down for faster web use, or resizing a batch of images to a platform's specific banner or thumbnail dimensions.

How to resize an image

1Upload one or more images.
2Enter exact target dimensions in pixels, or a percentage of the original size.
3Toggle aspect ratio lock on or off depending on whether you want proportional scaling.
4Download the resized image, or all of them as a ZIP.

Frequently asked questions

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