~/allthedamn.tools

Image Resizer

Get any image to the exact pixels or percentage you need, without uploading it anywhere.

runs entirely in your browser

Exact pixels, because close enough gets rejected

Most resize jobs come with a requirement attached: a profile photo that must be exactly square, a marketplace listing with a minimum width, a header image the CMS insists on, or a batch of photos that just need to be half the size before they go in an email. A full photo editor can do all of this, but launching one to change two numbers is the wrong tool for the job.

This resizer takes either exact pixel dimensions or a percentage. Aspect ratio lock is on by default, so typing a new width fills in the matching height and your photo does not come out stretched or squashed. Turn the lock off only when the target genuinely calls for a different shape.

How the resize happens, and what to expect

The image is redrawn at the new dimensions directly in your browser, using high-quality downscaling so shrunken photos keep their detail instead of going soft and blocky. You pick the output format, JPG, PNG, or WebP, and download the result. Nothing is sent anywhere; the processing is local from drop to download.

Enlarging works too, with a caveat you should hear before clicking: upscaling adds pixels, not detail. The browser interpolates new pixels from the ones that exist, which makes the image bigger and slightly softer, never sharper. A modest bump usually looks fine. If you need a small image to look crisp at several times its size, no resizer can honestly promise that.

fair questions

Will resizing distort my photo?
Not unless you ask it to. Aspect ratio lock is on by default, so changing one dimension recalculates the other and the proportions stay intact. Distortion only happens if you unlock the ratio and enter a mismatched width and height on purpose.
Can I enlarge an image without losing quality?
You can enlarge it, but new detail cannot be invented. Upscaling interpolates extra pixels from existing ones, so the result is bigger and somewhat softer than the original. Small increases are usually acceptable; large ones will look blurry up close.
Do my photos leave my computer?
They do not. Resizing runs on your own device inside the browser. There is no upload step and no server processing, so the only copy of your image is the one on your machine.
Which output format should I choose?
JPG for photographs where file size matters, PNG when you need transparency or hard-edged graphics like screenshots and text, and WebP when the destination supports it, since it typically produces smaller files than either at similar quality.

this site is built on Guardrails, the guard-railed boilerplate for shipping real products with AI agents.