Free Online PDF Tools — Merge, Compress, Convert & More
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Large PDFs -- often full of high-resolution scanned images -- can be hard to email or upload. This tool re-encodes embedded images to shrink the file, with three quality levels so you can balance size against visual quality.
This is one of the tools that needs a server (image re-encoding is heavier than a browser can handle smoothly for large files), but your file is uploaded only for this one operation and deleted immediately afterward -- never stored, never logged.
"High" keeps images close to their original quality with modest size reduction; "low" gives the smallest file but more visible compression -- "medium" is a good default.
No -- only embedded images are re-encoded; text, tables, and page count are untouched.