Best PDF Compression Settings for Email Attachments

Most email providers limit attachments to 25MB. If your PDF is too large, you need to compress it without losing quality. This guide covers the best compression settings for different use cases.

Understanding Email Limits

Gmail, Outlook, and Yahoo all have attachment size limits. Gmail allows up to 25MB, while Outlook limits attachments to 20MB. If your PDF exceeds these limits, you will need to compress it or use a cloud storage link.

Pro tip: Even if your PDF is under the limit, smaller files upload faster and are more reliable to send over unstable connections.

High Quality Setting (Recommended)

For documents that need to look professional — contracts, reports, resumes — use the High Quality setting. This reduces file size by 10-30% while keeping text perfectly sharp and images clearly visible.

Best for: Business documents, resumes, contracts, and any file where readability is critical.

Medium Compression

Medium compression reduces file size by 40-60%. Images are slightly compressed, but text remains perfectly readable. This is the sweet spot for most email attachments.

Best for: Long documents with images, presentations, and brochures that need to be shared quickly.

Maximum Compression

Maximum compression can reduce file size by 70-90%. Images are heavily compressed, but text remains readable. This is ideal when you need to get a file under a strict size limit.

Best for: Large image-heavy PDFs, scanned documents, and files that need to be sent as email attachments when cloud storage is not an option.

Conclusion

Choose High Quality for professional documents, Medium for most email attachments, and Maximum only when you have a strict size limit. Always preview the compressed file before sending to ensure it meets your quality standards.