Image Resize

Resize an image online — free and private

A photo straight off a phone or camera is usually far bigger than you need — thousands of pixels wide and several megabytes. When you have to fit an upload limit, match a size a website asks for, or just make a picture load faster, resizing is the answer. This tool changes an image's dimensions right in your browser: set an exact width and height, scale by a percentage, or pick a ready-made size, and download the result.

Everything happens on your device. The image you choose is never uploaded, never stored on a server, and never seen by anyone but you — which matters when the picture is a document, an ID, or anything personal you'd rather not send to a stranger's computer.

By pixels or by percentage

There are two ways to resize, and each suits a different goal. Resizing by pixels lets you type an exact width and height — perfect when a form says "max 1000px wide" or a template needs a precise size. Resizing by percentage scales the whole image down (or the numbers up) relative to the original, which is the quickest way to make something roughly half or a quarter of its current size without doing the maths.

Quick presets cover the most common cases: standard widths like 1920, 1280, 800, and 400 pixels, plus ready sizes for a square social post, a 1200×630 link preview, and 1920×1080 Full HD. Tap one and the fields fill in for you.

Keeping the aspect ratio

By default the aspect ratio is locked: change the width and the height updates automatically so the image never looks stretched or squashed. That's what you want almost every time. If you genuinely need an exact non-proportional size — a fixed banner slot, for instance — unlock the ratio and set width and height independently. The tool shows the final output dimensions before you resize, so there are no surprises.

Formats and quality

You can save the resized image as JPG, PNG, or WebP. JPG is the smallest and best for photos; PNG is lossless and keeps transparency, which suits logos and graphics; WebP is a modern format that's compact and web-friendly, offered when your browser supports it. Making an image smaller in dimensions almost always makes the file smaller too, and the result card shows the before and after size so you can see the saving.

Note that resizing changes pixel dimensions. Shrinking an image is clean; enlarging a small image past its original size can look soft, because there's no extra detail to invent — that's true of any resizer, not just this one.

On iPhone and Android

The tool is built mobile-first and runs in your phone's browser with nothing to install. Pick a photo, set the size, and share the result straight from your device. If your photos are iPhone HEIC files, convert them first with HEIC to JPG and then resize the JPG here — both steps run entirely in your browser.

Privacy: your image never leaves your device

The resize is done with your browser's built-in canvas — the file is read, redrawn at the new size, and handed back to you, all locally. Nothing is uploaded, nothing is stored, and there's no account to create. Close the tab and the image is gone from the page, because it was never sent anywhere to begin with.

Frequently asked questions

How do I resize an image?

Upload it, then either type an exact width and height, or switch to percentage and scale it down. Pick an output format and tap Resize — the new image is ready to download or share.

Will resizing keep the proportions?

Yes, by default. The aspect ratio is locked, so changing one side updates the other automatically. Unlock it only if you deliberately want a non-proportional size.

Will I lose quality?

Making an image smaller keeps it looking sharp. Enlarging beyond the original dimensions can look soft, since there's no extra detail to add — this is true of any resizing tool.

Is my image uploaded to a server?

No. Resizing happens entirely in your browser — your image never leaves your device, and nothing is stored or sent anywhere.