How to Make a PDF Smaller for Email — Free, Fast, No Signup
You've written the email, attached the PDF, and hit Send — only to get an error: attachment too large. Every major email provider has size limits (Gmail: 25 MB, Outlook: 20 MB, Yahoo: 25 MB). PDFBro makes PDFs smaller for email in under 30 seconds, free, directly in your browser.
Free Online Tool
Compress PDF
Reduce PDF file size without losing quality
Fastest Way to Make a PDF Smaller for Email
- 1
Open Compress PDF
Visit pdfbro.tech/tools/compress-pdf on any device.
- 2
Upload the oversized PDF
Drag and drop or click to upload.
- 3
Choose Medium compression
Medium compression reduces most PDFs 40–60% with no visible quality loss. If still over limit, try High.
- 4
Download and attach to email
Download the smaller file and attach it to your email as normal.
Email Size Limits by Provider
| Email Provider | Attachment Limit | Safe Target |
|---|---|---|
| Gmail | 25 MB total | Under 20 MB |
| Outlook.com | 20 MB | Under 15 MB |
| Office 365 / Exchange | 10–35 MB (admin set) | Under 10 MB |
| Yahoo Mail | 25 MB | Under 20 MB |
| Apple iCloud Mail | 20 MB | Under 15 MB |
| Corporate email | Often 10 MB | Under 8 MB |
When the PDF Is Still Too Large
If High compression still leaves the PDF too large:
Option 1 — Google Drive: Upload the PDF to Google Drive, right-click → Share → Anyone with link → Copy link. Paste the link in your email instead of an attachment.
Option 2 — Split: Split the PDF into two parts using PDFBro's Split PDF tool. Send as two separate emails.
Option 3 — WeTransfer: Free file transfer for files up to 2 GB. Upload the PDF, WeTransfer gives you a download link.
Pro Tips
- 1
For recurring reports you email weekly (expense reports, status updates), create a permanent compressed version and reuse it.
- 2
If you send PDFs via Outlook, check your company's IT-set limit — it's often 10 MB regardless of what Outlook.com shows.
Frequently Asked Questions
What is Gmail's PDF attachment size limit?
Gmail allows 25 MB total attachments per email. Files over 25 MB trigger Google Drive sharing automatically.
How much smaller will my PDF get?
Scanned/image PDFs: 50–80% reduction. Text-only PDFs: 10–25% reduction. Presentation PDFs: 40–70% reduction.
Is there a free way to send large PDFs by email?
Yes. Google Drive (free, unlimited storage), WeTransfer (free up to 2 GB), or Dropbox free tier.