Compress PDF & Reduce File Size
Effortlessly reduce the size of your PDF files to make them easier to share and store. Our online tool optimizes your documents for a smaller file size by converting pages to optimized images. It's fast, free, and completely secure as everything happens in your browser.
- check_circle Adjust Quality and DPI for perfect balance.
- check_circle Best for image-heavy PDFs like scans and presentations.
- check_circle 100% private client-side processing.
Full Control Over Compression
You decide the trade-off. Lower the DPI and Quality for maximum compression, or keep them high to preserve detail. Our tool gives you the flexibility to choose.
Maximum Privacy Guaranteed
Your files are never uploaded to a server. All processing, from reading the PDF to creating the compressed version, happens directly on your computer inside the browser.
How to Compress a PDF Online:
- Select or drag and drop your PDF into the toolbox.
- Adjust the Quality and DPI sliders to your preference.
- Click the ‘Compress PDF’ button to start.
- Wait for the process to finish on each page.
- Download your new, smaller PDF file.
PDF Compressor FAQs
How does this compression tool work?
This tool converts each page of your PDF into an image. It then compresses these images based on your selected Quality and DPI settings and combines them back into a new PDF. This process happens entirely in your browser, ensuring your files remain private.
Why can't I select or search for text in the compressed PDF?
This is the most important trade-off of this method. Because each page is converted into an image to achieve high compression, the original text data is lost. The final PDF is a collection of images, not a text document. If you need searchable text, a server-side solution is required.
What are the best settings for Quality and DPI?
For a good balance between size and quality for screen viewing, the default settings (75% Quality, 144 DPI) are recommended. For the smallest possible size, you can lower the DPI to 72 and reduce the quality further. For higher quality, increase the DPI.
Can compressing make my file size bigger?
Yes, it's possible. If your original PDF was mostly text with very few images, converting each page into a full-resolution image can sometimes result in a larger file size. This tool works best for PDFs that are already image-heavy, like scans or presentations.
Is it safe to compress my documents with this tool?
Absolutely. The entire compression process happens directly in your web browser. Your files are never sent to or stored on our servers, giving you complete privacy and security.