Detect Oversized Pages
Find pages larger than a specified size
Downsample Images
Reduce image resolution (DPI)
This tool processes your files entirely in your browser. Your documents never leave your device.
Drag & drop PDF files here
or Browse Files
PDF, PDF•Max size: 100MB per file
Reduce image resolution to decrease file size. Lower DPI means smaller files but reduced image quality.
About This Tool
Downsample images in PDF files to reduce resolution and file size with our free online image optimizer. Lower embedded image DPI for smaller files optimized for screen viewing or email, maintaining compatibility with Adobe Acrobat and all PDF readers.
Set your target resolution in DPI (dots per inch) to match your intended use: 72 DPI for web and screen, 150 DPI for general documents, 300 DPI for print quality. Images above your threshold are automatically downsampled while smaller images remain unchanged.
All image downsampling happens locally in your web browser. Your documents never upload to external servers, ensuring privacy for photo-heavy reports, image-rich presentations, and documents containing sensitive visual content.
Perfect for reducing oversized scanned documents, optimizing photos embedded in PDF reports, preparing image-heavy files for web distribution, or creating screen-optimized versions of print-ready documents. Works with all PDF files containing embedded images from Adobe Acrobat, scanning software, and Microsoft Office.
Frequently Asked Questions
- Is Downsample Images free?
- Yes, completely free with no hidden costs, subscriptions, or usage limits. All tools are available at no charge.
- Is it safe to use Downsample Images?
- Yes, 100% safe. All processing happens locally in your browser. Your files are never uploaded to any server and never leave your device.
- What is the maximum file size?
- You can process files up to 100MB. Since everything runs in your browser, processing speed depends on your device.