PDF compressor

What this tool does — honestly

Many PDFs carry more weight than they need: uncompressed internal structure, duplicated objects and leftover data from the software that wrote them. This tool loads your PDF in the browser and re-saves it using compressed object streams, which packs the document's structure far more efficiently. For PDFs written by older scanners and office suites, that alone can trim a noticeable amount — sometimes 5–30%.

Here is what it does not do, because we would rather be straight with you: it does not shrink the images inside your PDF. If your file is large because it contains high-resolution scans or photos, re-saving the structure will only help a little, and no honest in-browser tool can rebuild those images at a lower resolution without changing how the pages look. For a dramatically smaller file in that case, the practical routes are to extract only the pages you need, or to re-create the PDF from smaller source images using our image compressor.

When this tool helps most

• PDFs exported by older versions of Word, scanners and print-to-PDF drivers.
• Documents that have been edited and re-saved many times, accumulating bloat.
• Files that are just over an email or upload limit, where a modest saving is all you need.

The tool always shows you the before and after sizes before you download, so you can see exactly what you saved — and keep your original if the saving is not worth it.