Compress PDF files in your browser.
Reduce PDF size with selectable compression strength, page rendering quality and image resolution. Review the estimated result before downloading.
Reduce PDF file size directly in your browser with adjustable compression presets, image quality, render resolution, first-page preview and before-and-after size statistics.
About This Tool
ToolsFaction PDF Compressor is designed for reducing the size of scanned and image-heavy PDF files directly in your browser. Choose a compression preset, adjust image quality and rendering resolution, then compare the original and optimized file sizes before downloading.nnTo achieve meaningful browser-based compression, pages are rebuilt from optimized page images. This approach can significantly reduce some image-heavy PDFs, but it can also flatten selectable text, hyperlinks, form fields and vector graphics. For that reason, the tool clearly exposes its compression method rather than hiding the trade-off.
How to Use
- Drop a PDF into the tool or choose a PDF file from your device.
- Select Strong, Balanced or High Quality compression and adjust image quality or rendering resolution if needed.
- Choose Compress PDF and wait while the pages are processed in your browser.
- Compare the original and compressed file sizes, then download the result. Check important text, links and forms before replacing the original document.
Example
A scanned multi-page PDF containing large photographic page images can often be reduced by selecting Strong compression and a lower image quality setting, then downloading the rebuilt optimized PDF.
Frequently Asked Questions
How does the PDF Compressor reduce file size?
It renders PDF pages and rebuilds them using optimized page images. This can reduce image-heavy documents but may flatten text, links, forms and vector content.
Which compression preset should I use?
Balanced is a practical starting point. Strong prioritizes smaller files, while High Quality preserves more visual detail at the cost of a larger result.
Will text remain selectable after compression?
Not necessarily. Because pages are rebuilt from rendered images, selectable text and other interactive PDF features may be flattened.
Why can the compressed PDF sometimes be larger?
Already optimized PDFs, text-heavy documents or high-quality settings can produce a rebuilt file that is similar in size or larger. Try stronger settings when file size is the priority.
Does this work well for scanned PDFs?
Scanned and image-heavy PDFs are often the best candidates for this type of compression because much of their file size comes from page images.
Are my PDF files uploaded?
The compression workflow is designed to process the PDF in your browser. The required PDF components are loaded into the page, while the selected document is handled locally by the browser.
Is the PDF Compressor free?
Yes. ToolsFaction PDF Compressor is free to use and does not require sign-up.