How to Compress a PDF for Email — Privately, in Your Browser
PDFs with images or scans are huge and get rejected by email. Compress them locally with our free tool — your document never leaves your computer.
You scanned a contract, exported a report, or saved a presentation — and the PDF is 40 MB. Email rejects it, Slack warns you, and your client is waiting. You need to shrink it. The question is: do you really want to upload that document to a random website?
Why PDFs get so big
- Scanned pages are stored as images, not text.
- Embedded photos at full resolution.
- Fonts and layers that bloat the file.
Compress a PDF without uploading it
Our PDF compressor does the whole job in your browser:
- Drop the PDF onto the page.
- Choose a compression level (the tool re-encodes images inside the PDF).
- Download the smaller file.
Your PDF is never sent anywhere. It's processed in your browser tab and the result downloads straight to your machine. For sensitive contracts, that privacy matters.
What to expect
- Image-heavy PDFs shrink the most.
- Plain text PDFs are already small and won't shrink much — that's normal.
- If a single file is still too big after compressing, split it with our PDF split tool and send it in parts.
Pair it with other local PDF tools
- Merge PDFs to combine several documents first, then compress the result.
- Extract pages you don't need to cut weight before compressing.
- Need to turn paper into PDF? Our image to PDF tool keeps that step local too.
Why local beats "free PDF sites"
Most free PDF compressors upload your file to their servers, process it, and email or link you the result. For a public brochure that's okay. For anything personal, financial, or confidential, processing it on your own device is the safer default — and just as fast.