PDF Compressor

Reduce PDF file size in your browser — no upload, 100% private

Good balance between quality and file size.

Drop your PDF here or click to browse

Processed entirely in your browser — never uploaded

Free Online PDF Compressor

Reduce the file size of your PDF documents entirely within your browser. No file is ever uploaded to a server — your documents stay private. The compressor re-renders each PDF page at optimized image quality, significantly reducing file size while maintaining readability.

Choose from three compression levels: Screen quality for maximum compression (ideal for email attachments and web uploads), eBook quality for a good balance, and Print quality for high-fidelity output suitable for printing.

Compression Levels Explained

Screen

Maximum compression. Images rendered at lower resolution and JPEG quality 60%. Typical reduction: 60–80%. Best for email attachments, digital sharing, and web uploads.

eBook

Balanced compression. Good quality at significantly reduced file size. Typical reduction: 40–60%. Best for reading, sharing, and general use.

Print

High quality compression. Preserves image detail suitable for printing. Typical reduction: 20–40%. Best for documents that will be printed or archived.

Frequently Asked Questions

Is the compression lossless?
No. Browser-based PDF compression works by re-rendering pages as JPEG images. This is a lossy process — some quality is sacrificed to achieve smaller file sizes. For lossless PDF compression (which only removes metadata and redundant data), desktop software like Ghostscript or Adobe Acrobat is more appropriate.
How much can I reduce my PDF?
Results depend on the content. Image-heavy PDFs compress significantly (50–80%). Text-heavy PDFs with few images may see less reduction (10–30%). The "Screen" setting achieves the most compression.
Is my PDF private?
Yes. All processing happens entirely in your browser. Your PDF never leaves your device. We have no access to your files.
Why is my compressed PDF larger than the original?
This can happen with PDFs that are already optimized, or PDFs containing only vector graphics. Re-rendering vector content as JPEG images can increase file size. In this case, try a lower resolution setting.

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