Upsize an Image
Proportionally enlarge an image to a percentage of its size. Runs entirely in your browser, so your data never leaves your device.
Drop a file here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Upsize an Image
- 1. Upload the image to grow. Add the image you want enlarged proportionally. Its original dimensions are shown so you can see what percentage growth will produce.
- 2. Set the Size percentage. Enter a value above 100, such as 150 or 200, to grow the image to that percentage of its original size while keeping width and height proportional.
- 3. Download the enlarged image. Save the result once the new dimensions match what you need for your layout or export.
When to use Upsize an Image
Upsize an Image proportionally enlarges a picture to a percentage of its original size, keeping the aspect ratio intact without needing to calculate exact target pixel dimensions yourself. It's a quick way to scale up when you're thinking in percentages rather than pixels.
- Growing an image by a round percentage for a slide. A presentation slide needs an image bigger than its source resolution, and thinking in a round number like 150% is simpler than calculating exact pixels. Entering the percentage handles the math directly.
- Matching a design spec given in percentage terms. A design brief specifies scaling an asset to 200% of its base size for a high-density display variant. Entering that percentage produces the exact scaled asset needed.
- Enlarging a thumbnail for a quick preview. A small thumbnail needs to be shown bigger in a quick mockup without fussing over exact target dimensions. Bumping the size percentage up gives a proportionally larger version in one step.
Examples
Grow to 200%
Input
photo.png (400×300) + 200%
Output
photo.png at 800×600
About the Upsize an Image tool
Upsize an Image runs as plain JavaScript in your browser tab, with no server behind it. Proportionally enlarge an image to a percentage of its size. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's Image Tools section, 200 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with the Size (%) setting, and the result refreshes the moment you change it. The finished file is put together in browser memory and saved with the Download button, so it never touches a server on the way to your disk. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Is Upsize an Image free to use?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Are my files uploaded to a server?
Everything happens locally. Your browser downloads the tool's code once, then does all the processing itself; nothing you enter is transmitted, stored or logged. You can even go offline after the page loads and it will still work.
Which files does Upsize an Image accept?
It accepts images in any common format (PNG, JPG, WebP, GIF and more). There is no file size cap imposed by a server; very large files are limited only by your device's memory.
Do I need to sign up or install anything?
No. The tool works in any modern browser on desktop, tablet or phone. There is no account to create, no extension to add and no software to install.
How do I save the output?
Click the Download button once the result is ready. The file is built in your browser's memory and handed straight to your downloads folder, without passing through a server.