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Reduce file size while optimizing for maximum quality.
Your file is deleted from our server right after processing.
Your file is uploaded securely to run this tool, then deleted from our server immediately after processing — never stored, logged, or shared.
1. Drag-and-drop or select your file in the workspace above.
2. Adjust any options this tool shows for your document.
3. Click "Process Compress PDF" to run the conversion.
4. Download the finished file — your upload is deleted from our server right after processing.
Compress PDF runs your file through Ghostscript's /screen preset, the most aggressive of Ghostscript's four output-quality tiers, which recompresses and downsamples embedded photos and scanned pages while your document's actual text and vector graphics typically stay sharp. There's no light, medium, or heavy setting to pick, and no options panel at all — you drop in one PDF and click one button. Every upload gets the exact same fixed, aggressive pass, which shrinks a stack of scanned receipts or a photo-heavy report dramatically but won't do much for a file that's already mostly vector text and has little left to recompress.
Compression only works on a file that already opens cleanly; if Ghostscript can't parse the structure at all, run Repair PDF first and compress the fixed copy afterward. Because the preset is fixed rather than adjustable, a handful of very large, image-dense files can still come back bigger than you'd like even after this aggressive pass — there's no way to squeeze harder by choosing a lower-quality setting, since none exists. When that happens, splitting the file into smaller parts gets each piece under an email attachment or upload-portal limit, which solves the "still too big" problem more reliably than hoping for a stronger compression option.
The result downloads as a standard compressed-result.pdf with the same page count and content as your original, just smaller — ready to attach to an email, upload to a portal with a size cap, or feed straight into Merge PDF alongside other files once every file in the batch is a manageable size.
Last updated: July 27, 2026
DocShift deletes your file from our server the moment processing finishes — nothing is stored, logged, or shared. There's nothing to install and no sign-up: your document is ready in seconds.
Image-heavy pages are recompressed and downsampled by Ghostscript's /screen preset, so scans and photos lose some detail — that preset is deliberately aggressive. Vector text and line art are typically preserved sharp, since only raster images get recompressed.
No. The tool always applies the same fixed /screen preset — there is no light, medium, or heavy option. If you need to preserve high-resolution photos, this fixed aggressive setting may not be the right fit for that particular file.
Because the compression setting is fixed rather than adjustable, a handful of very image-dense files will not shrink much further. Try splitting it into smaller parts so each piece fits your upload or email limit instead.
Compress PDF assumes the file already opens correctly. If the PDF is damaged, run Repair PDF first, then compress the repaired copy.
A single compressed-result.pdf with the same pages and content as your original, just a smaller file size.