Free Online Compress PDF
Compress PDF works entirely on your own machine. It reads the file, rewrites duplicate font and object references, optionally downsamples large images, and hands you the smaller PDF back through your browser download.
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How to use Compress PDF
- Drop one or more PDF files on the panel, or click to choose them.
- Pick a level: Best quality keeps everything, Recommended balances size, Smallest file resamples images hardest.
- Press Compress and watch the before/after numbers for each file.
- Download the result, or grab all of them as one zip.
Questions about Compress PDF
Why does a scanned PDF barely shrink?
A scanned page is really a photograph. The savings come from re-encoding those page images, so use the Smallest file level or convert the pages to JPEG first.
Does it remove pages or text?
No. The page count, text layer and links stay intact; only redundant objects and oversized images are re-encoded.
About Compress PDF
Compress PDF files to a smaller size with our free online Compress PDF. 100% browser-based, fast, and private—no login or file uploads required.
These PDF tools work on whole documents: combine pages, split ranges, rotate, watermark, compress or convert to images and text, keeping the original layout and page order under your control.
This tool runs in your browser. The file is not uploaded. Keep a copy of the original before compressing or splitting: compression trades some image quality for size, and a split cannot be undone once you close the tab.