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Compress PDF for Email — Stay Under the Attachment Limit

Gmail, Outlook, and most email clients block attachments over 25MB — and even large PDFs under that limit can slow down email delivery. Compress your PDF before attaching it to keep emails snappy and ensure they reach the recipient's inbox.

Compress PDF for Email — Stay Under the Attachment Limit — Try it free

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How It Works

  1. 1

    Upload the PDF you want to email

    Drop in the PDF. Common large-PDF scenarios: scanned contracts, photo-heavy presentations, architectural drawings, and annual reports.

  2. 2

    Choose compression level

    For a PDF you're emailing (not printing), Medium compression is usually ideal — it typically cuts size by 60–70% while keeping the document looking professional on screen.

  3. 3

    Download and attach to your email

    Save the compressed PDF. Check the file size is under 25MB (Gmail limit) or 10MB (Outlook default) before attaching.

Frequently Asked Questions

What is the email attachment size limit?+
Gmail: 25MB per email. Outlook.com: 20MB. Apple Mail: 20MB. Corporate Outlook servers: often as low as 10MB. When in doubt, compress to under 5MB for reliable delivery.
Should I compress a PDF or send it via Google Drive link?+
For documents under 10MB after compression, attaching directly is fastest. For documents that remain over 10MB even after maximum compression, a Drive/Dropbox link is more reliable.
Does compressing a PDF for email make it print at lower quality?+
Medium compression (150 DPI) is fine for most office printing. If the recipient needs to print at high quality, mention this and offer to send the uncompressed version separately.

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