How to Resize an Image to Exact Pixel Dimensions
2026-07-04
When You Need to Resize a Photo
Sometimes a photo is simply too large to go where you need it. Upload limits on websites and email providers, exact pixel requirements for profile pictures or banners, and page-speed targets for blogs and online stores all demand a specific size. Resizing lets you set the exact pixel dimensions you need rather than hoping the platform scales it down acceptably on its own.
Modern smartphone photos often exceed 4000×3000 pixels — far larger than a screen ever displays them. Dropping to a sensible width before uploading can cut file size dramatically, speed up page loads, and save storage without any visible quality loss at typical display sizes.
How to Resize by Pixel Dimensions
Drop your image into the tool below and it reads the original dimensions straight away, pre-filling the width and height fields. Type in the pixel values you want, keep aspect-ratio lock on so only one side needs changing, pick a format, and hit Convert.
- 1Open the resize tool below and drag in a JPG, PNG, or WebP image — or click to upload it.
- 2Enter the width (px) and height (px) you want. With "Lock aspect ratio" checked, filling in one side automatically calculates the other.
- 3Choose the output format (JPG, PNG, or WebP). For JPG and WebP you can also adjust quality with the slider to trade file size against sharpness.
- 4Click Convert to run the resize.
- 5Once the result appears, click Download to save your resized image.
Tips for Better Results
Leave aspect-ratio lock on unless you deliberately want to distort the image. Enter just the width — say, 1200 — and the height follows automatically, keeping the photo's proportions intact. Only turn it off when you need to force a fixed canvas size that doesn't match the original ratio.
Scaling an image above its original resolution will look soft or pixelated — the tool can't invent detail that wasn't there. If you need a larger version, always start from the highest-resolution original you have. For web use, shrink the width to your layout's max display size and save as WebP; you'll typically cut file size in half compared to JPG at the same visual quality.
Resize Image
Hit an upload size limit, need a photo at exact pixel dimensions, or just want to shrink a huge phone shot? Resize images free in your browser.
Frequently asked questions
No. Your original stays exactly as it was — you download a separate, resized copy. Everything runs inside your browser, so your image is never sent to a server.
You can upload JPG, PNG, or WebP. When saving, you can choose any of those three as the output format. HEIC files from iPhones are also read automatically if you drop them in.
You can set width and height completely independently. Entering values that don't match the original ratio will stretch or squash the photo, so only turn it off when that's intentional — for example, forcing a square thumbnail from a landscape photo.
