Make PDF small enough to email. Compress PDF under 25MB for Gmail, Outlook, and Yahoo Mail. Free, no signup, instant results.

Gmail bounces attachments over 25MB. Outlook cuts off at 20MB. Corporate mail servers are often stricter — 10MB or even 5MB. If your PDF keeps getting rejected, compression is the fix. ## How to Compress PDF for Email 1. Go to [pdfhub24.com/compress-pdf](/compress-pdf) 2. Upload your PDF 3. Select **Medium Compression** (best balance of quality and size) 4. Download the compressed file 5. Check the file size — if still over your limit, try High Compression For most business documents, Medium Compression reduces a 30MB file to 4–8MB with no visible quality difference when read on screen. ## Email Provider Size Limits | Provider | Attachment Limit | Safe Target | |---|---|---| | Gmail | 25MB | Under 20MB | | Outlook.com | 20MB | Under 15MB | | Yahoo Mail | 25MB | Under 20MB | | Apple Mail | 20MB | Under 15MB | | Corporate Exchange | Often 10MB | Under 8MB | When in doubt, target under 10MB. That fits every provider. ## Why Your PDF Is Large **Embedded images** are the main culprit. A single full-page photograph can be 3–5MB. A presentation with 20 slides full of images easily hits 50MB. Our compressor reduces image resolution to screen quality (150 DPI) — indistinguishable on screen, dramatically smaller. **Scanned documents** are essentially photos. A 10-page scanned contract can be 20MB. High compression brings this to 1–2MB. **Word-to-PDF exports** from documents with high-res logos or photos. Medium compression fixes this without touching text quality. ## If Compression Isn't Enough Still over the limit after High Compression? Two options: **Split it:** Use [pdfhub24.com/split-pdf](/split-pdf) to extract only the pages the recipient actually needs. If you're sending a 50-page report for a 5-page section, send just those 5 pages. **Share via link:** Upload to Google Drive or Dropbox and paste the share link in your email. No size limit, recipient clicks to view. ## Does Compression Affect Quality? For email, no — because email recipients view PDFs on screen. Screen viewing requires images at 72–150 DPI. Most PDFs store images at 300–600 DPI. Medium compression brings images down to 150 DPI: identical on screen, half the file size.