Downscale Images in a PDF
Re-render pages at a lower DPI to shrink oversized images. Runs entirely in your browser, so your data never leaves your device.
Drop a PDF here, or click to browse
Files never leave your device
Output
The result appears here as you type.
How to use Downscale Images in a PDF
- 1. Load the PDF. Drop your document into the workspace. Pages get re-rendered internally at a lower resolution to shrink oversized embedded images.
- 2. Set the target DPI. Choose Target DPI for the resolution each page should be rendered at. Screen viewing rarely needs more than 150, while print work may still call for 300.
- 3. Adjust JPEG quality. Set JPEG quality to balance sharpness against file size once the resolution is reduced, since a lower DPI already does most of the size-saving work.
- 4. Download the downscaled PDF. Generate and save the file. It contains the same pages at a lower effective image resolution and a smaller overall size.
When to use Downscale Images in a PDF
Downscale Images in a PDF re-renders pages at a lower DPI to shrink oversized embedded images, a targeted fix for PDFs bloated by high-resolution scans or exports. It gives more control than a generic compression pass when only the images are the problem.
- Reducing a scanned document meant only for screen viewing. A document was scanned at print-quality resolution but only ever gets read on screen. Downscaling to a lower DPI removes wasted resolution nobody actually needs.
- Shrinking exports from design software. A PDF exported from a design tool embeds every image at its original high resolution regardless of how it displays on the page. Downscaling brings that down to a sensible size.
- Preparing a lighter version for mobile viewing. A large PDF loads slowly on a mobile connection. Rendering it at a lower DPI produces a lighter file that opens faster without losing legibility on a small screen.
About the Downscale Images in a PDF tool
Downscale Images in a PDF runs as plain JavaScript in your browser tab, with no server behind it. Re-render pages at a lower DPI to shrink oversized images. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's PDF Tools section, 92 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 2 settings, including Target DPI and JPEG quality, and the result refreshes the moment you change one. 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.
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 Downscale Images in a PDF 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 Downscale Images in a PDF accept?
It accepts PDF documents. 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.