Reduce Image Resolution with Preview
Before
After (Preview)
Significantly shrink your PDF file size by reducing the Dots Per Inch (DPI) of the images it contains. Our tool provides a visual "Before" and "After" preview so you can see the quality change before you download. Perfect for making large files easy to share.
- check_circle See a live preview of the quality change.
- check_circle Drastically reduce the size of image-heavy PDFs.
- check_circle Your files are secure and processed in your browser.
Preview Before You Process
No more guessing. See a side-by-side comparison of your original document and a simulation of the reduced quality version. Choose the perfect balance between file size and clarity.
Secure and Private Processing
Your privacy is paramount. The entire process of reducing image resolution happens in your browser. Your files are never uploaded to our servers, ensuring maximum confidentiality.
Works on Any Device
Reduce image resolution in your PDFs directly from your web browser. Our tool works seamlessly on Mac, Windows, Linux, Android, and iOS without any software installation.
Text Remains Unchanged
This tool only targets the images within your PDF. All text and vector graphics will remain untouched, ensuring your document's text stays sharp and searchable.
Perfect for Scans & Portfolios
Scanned documents and graphic-rich portfolios often have unnecessarily large file sizes. Reducing the image resolution is the best way to make them manageable and shareable.
Client-Side Processing
Our online tool processes your PDF directly in your browser. This means your file is processed instantly, offering maximum privacy and speed without using server resources.
How to Reduce Image Resolution in a PDF:
- Drag & drop your PDF file into the designated area.
- Compare the "Before" and "After" previews on your screen.
- Select your desired image resolution (e.g., 144 DPI). The "After" preview will update.
- Click the ‘Reduce Resolution’ button to begin the process.
- Download your new, significantly smaller PDF file.
PDF Image Resolution FAQs
What does the "After" preview show?
The "After" preview is a visual simulation to help you understand how much image quality might be lost. It renders the PDF at a lower resolution to mimic the appearance of a lower DPI. This allows you to make an informed choice before processing the file.
Which DPI setting should I choose?
For viewing on screens (web, email), 72 DPI is usually sufficient and provides the best compression. For standard home or office printing, 144 DPI offers a good balance between quality and file size. Use the live preview to decide what works best for you.
Will this affect the text in my PDF?
No. This tool is designed to only target raster images (like JPEGs and PNGs) within the PDF. All vector content, including text and line art, will remain at its original high quality, ensuring your text is always sharp and clear.
Why didn't my file size change much?
This tool is most effective on PDFs that contain large, high-resolution images, such as scans or photo albums. If your PDF is mostly text or vector graphics, there are no images to optimize, so the file size will remain largely the same.
Is it safe to process my sensitive documents with this tool?
Our tool is exceptionally secure. The entire process happens directly in your web browser. This means your files are never sent to or stored on our servers, giving you complete privacy and peace of mind.