Reduce your PDF's file size for easier sharing and uploading, processed entirely in your browser.
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Your file is processed entirely in your browser. Nothing is uploaded to any server. Savings vary depending on the PDF, files with large embedded images typically compress the most.
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This tool re-saves your PDF using optimized internal object storage, removing redundant data and overhead from the file structure. Unlike some compressors that reduce image quality, this tool focuses on structural optimization, so the amount of savings depends heavily on how the original PDF was created.
PDFs containing large, high-resolution embedded images typically see the biggest reduction in file size, while text-only PDFs or files already optimized by other software may show minimal change, since there's simply less redundant data left to remove.
Upload a 4 MB PDF exported from a design tool with unoptimized internal structure, and after compressing it shows something like '4 MB to 2.8 MB (30% smaller)'. Run the already-compressed 2.8 MB file back through the tool a second time, and expect little to no further reduction, once the redundant structural overhead is gone, there's nothing left for this technique to remove, this is normal and not a sign the tool failed.
Expecting dramatic size reduction on a PDF that's mostly text with few or no images, this tool optimizes internal file structure, not image quality, a text-heavy PDF simply doesn't have much redundant structural data to remove.
Running the same file through compression repeatedly expecting cumulative savings, once the structural overhead is removed on the first pass, later passes on the same file typically show little to no further reduction.
Assuming this works like an image-quality-reducing compressor, if a PDF's size is dominated by large embedded photos and you need a much smaller file regardless of image quality, downsampling the images before embedding them would achieve more than structural optimization alone.
No, all compression happens directly in your browser. Your file is never uploaded anywhere.
It depends on the PDF's contents. Files with large embedded images typically compress the most, while text-only or already-optimized PDFs may see minimal reduction.
Text and layout remain unaffected. This tool focuses on reducing file overhead rather than lowering image quality.
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