Downsize an Image
Proportionally shrink 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 Downsize an Image
- 1. Drop in an image. Add the photo or graphic you want smaller, in any common format. The tool reads its current width and height before calculating the reduced size.
- 2. Enter the Size percentage. Type a percentage such as 50 to make the image half its current size, or 25 for a quarter. Both width and height shrink together so proportions stay identical.
- 3. Download the resized image. Click generate and download the resulting file at its new dimensions. The aspect ratio always matches the original since the percentage applies equally to both axes.
When to use Downsize an Image
Downsize an Image shrinks a picture proportionally to a percentage of its original size, entered as a familiar number like 50% rather than a decimal factor. It fits anyone thinking in terms of 'make it half as big' rather than target pixel dimensions.
- Fitting an attachment under an email size limit. A photo from a phone is too large to attach to an email under the provider's size cap, and shrinking it to 30% of its original size brings the file comfortably under the limit.
- Preparing images for a slower connection. You are sending photos to someone on a limited mobile data plan, and reducing each one to 40% of its size cuts the download noticeably without needing exact pixel targets.
- Matching a rough visual size request. A colleague asks for an image 'about half the size' for a document, and entering 50% delivers exactly that without you needing to calculate the target width and height first.
Examples
Shrink to 50%
Input
photo.png (400×300) + 50%
Output
photo.png at 200×150
About the Downsize an Image tool
Downsize an Image runs as plain JavaScript in your browser tab, with no server behind it. Proportionally shrink 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
Does Downsize an Image cost anything?
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?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
Which files does Downsize 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?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
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.