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Compress PDF Online
Reduce your PDF file size by re-optimizing the file structure. No quality loss. Processed entirely in your browser.
🔒 Files stay localFree
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Drop a PDF file here
or click to select — max 200 MB
PDF loaded
ℹPDF compression re-optimizes the file structure using pdf-lib. Results vary depending on the content — some PDFs are already well-compressed.
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PDF Compressed!
About PDF Compression
1
Select your PDF
Drop or click to select the PDF you want to compress.
2
Click Compress
FileWorks re-saves your PDF with optimized object streams — entirely in your browser.
3
Download
The compressed PDF downloads directly to your device. Compare the file size before and after.
Frequently Asked Questions
How much can this compress my PDF?
Results vary. This tool re-optimizes the PDF file structure and cross-reference streams. PDFs containing large images may not reduce significantly without image re-compression. For image-heavy PDFs, try exporting images at lower quality from the original source.
Will compression affect the quality?
No visual quality is lost. Only the file structure is optimized — text, images, and layout remain identical.
Are my files uploaded?
No. Everything happens in your browser using pdf-lib. Nothing is uploaded to any server.