How to Get a PDF Under 25MB for Email
Email providers cap attachments at 25MB (Gmail), 20MB (Outlook), and 10MB (some corporate mail servers). PDFs from scanners, image-heavy reports, and long compiled documents routinely exceed these limits. Here are three approaches that actually work.
Approach 1: Lossless compression
PDFPuddle's Compress PDF applies object-stream optimization without re-encoding images. Typical reduction: 10–40%. This is the safest first step — text stays sharp, images keep their resolution. If your file goes from 30MB to 18MB, you're done. If it goes from 30MB to 26MB, move to approach 2.
Approach 2: Image re-encoding
If lossless compression isn't enough, the bottleneck is usually images. Convert image-heavy pages to JPGs at lower quality (60–80%), then reassemble as a PDF using JPG to PDF. This sacrifices image quality for size — for text documents with photo illustrations, the trade-off is usually invisible to recipients.
Approach 3: Split the document
For long documents that compress poorly, split the PDF into chunks using Split PDF and send each chunk in a separate email. Recipients merge them back together with Merge PDF. Inelegant but reliable for any size.
When to use a file-sharing link instead
Above 50MB, give up on email attachments and use Google Drive, Dropbox, or a similar service to share a link. The recipient downloads on their own time, your inbox doesn't bounce, and the document gets versioned automatically. For confidential documents, password-protect the PDF (Protect PDF) before uploading.