PDF Compressor
Repack a PDF with compressed object streams to reduce its file size.
Your PDF is compressed locally in your browser and never uploaded.
What is pdf compressor?
This compressor re-saves your PDF using compressed object streams, which compacts the document structure and removes redundant objects. It shows the original and new size plus the percentage change before you download.
It is lossless — text, vectors, and images are preserved exactly. Savings are largest for PDFs produced by tools that write uncompressed structures.
How to use it
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Choose a PDF
Up to 50 MB.
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Review the savings
Original vs. compressed size is shown.
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Download
Keep whichever file is smaller.
Frequently asked questions
If the PDF is already optimized, most of its size is in compressed images and fonts that lossless repacking cannot reduce. For bigger wins, lower image quality with the Image Compressor before creating the PDF.
No. This is structural optimization, not quality reduction — content is preserved exactly.