PDF Compressor

Reduces a PDF's file size entirely in your browser. Your file is never uploaded anywhere.

Good to know: real client-side compression is limited. "Safe" mode keeps your text selectable but only trims a PDF's internal structure — often just 0–15% smaller. "Aggressive" mode can shrink files a lot more but turns every page into a recompressed image, so text is no longer selectable or searchable. Pick based on what matters more for this file.

Re-optimizes the PDF's internal structure. Text stays fully selectable and searchable, but savings are usually modest — often 0–15%, more if the file has editing history baked in.

Most PDF compressors run on a server, which means uploading your file to someone else's machine. This tool does the compression locally in your browser instead — nothing is ever sent anywhere.

There's an honest limit to how much a PDF can shrink without changing what it is. Text-based PDFs are already compressed internally, so "safe" mode — which just cleans up the file's structure — won't do much for a typical text document. To get a real size reduction, "aggressive" mode re-renders every page as a recompressed JPEG at your chosen quality level. That works great for scanned documents or image-heavy PDFs, but it's a genuine tradeoff: the output is no longer real, selectable text.

If you need the file smaller but still need to select or search the text, "safe" mode is the honest choice — it just won't work miracles. If you need the smallest possible file and don't need selectable text, "aggressive" mode will get you there.