PDF Compressor — Reduce PDF Size Free
Compress PDF files instantly. No signup, no file size limits, no watermarks. Your files never leave your device.
Drop your PDF here
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PDF files only • Up to 100MBPerfect For
How It Works
Upload PDF
Select or drop your PDF file. Files stay in your browser — never sent to any server.
Choose Level
Pick a compression level. Our tool removes redundant data and optimizes images within the PDF.
Download
Download your compressed PDF instantly. Original file is untouched.
How to Compress PDF Online Free
Upload your PDF using drag-and-drop. Select a compression level — Maximum for smallest file size, Balanced for best quality-to-size ratio, or High Quality for minimal compression. Click Compress PDF and download your optimized file instantly. No email required, no signup, no watermarks.
Frequently Asked Questions
Is this PDF compressor really free?
Yes, completely free with no hidden charges, no daily limits, and no file size restrictions. You can compress unlimited PDFs.
Is my PDF file safe and private?
Absolutely. Your PDF is processed entirely within your browser using JavaScript. The file is never uploaded to our servers or any third party. We have zero access to your files.
How much can I reduce my PDF size?
Compression depends on PDF content. PDFs with many images can be reduced by 50-80%. Text-only PDFs may only reduce by 10-20% as text is already compact.
Will compression reduce PDF quality?
Maximum compression may slightly reduce image quality within the PDF. Balanced mode maintains good visual quality. High Quality mode is nearly lossless.
Why is my PDF not compressing much?
If your PDF is already optimized or contains mostly text/vector graphics, there is limited room for compression. PDFs with high-resolution images compress the most.
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