Quick answer
Drag the PDF into Compress PDF in Safari or Chrome, choose a mode, compare the sizes, and download.
Step by step
- Open Safari or Chrome and go to Compress PDF.
- Drag the PDF from Finder onto the drop area, or click the area and choose the file.
- Pick "Structure Only" to keep text selectable, or "Rasterize & Recompress" and adjust the scale and quality sliders for the biggest reduction.
- Check the size comparison and click the download button.
- The file lands in your Downloads folder. Open it with Preview to check it, then attach it.
Tips
- To see the exact size, select the file in Finder and press Command-I.
- Preview also has a Reduce File Size option when you export. With editpdf.tools you can see the size change before you download, and choose lossless structure optimization when quality matters more.
- Compress once from the original, not again and again from compressed copies.
Good to know
The compression runs in your browser, so the PDF is not sent to a server.
Try it now: Compress PDF. Free, no signup, and your files stay in your browser.