Compress for Email
Compress images and PDFs to fit email limits for Gmail, Outlook, and GMX. ZIP download included. Free in your browser, no upload.
Compress Files for Email — Get Under the 25 MB Limit
The Email Compressor helps you reduce files to fit within email attachment size limits. Images, PDFs, and other files are compressed or bundled as ZIP — all directly in your browser, no upload required.
Email Attachment Limits by Provider
- Gmail — 25 MB per email (attachments + body combined)
- Outlook / Microsoft 365 — 20 MB (default configuration)
- Apple Mail / iCloud — 20 MB (larger files via Mail Drop)
- Thunderbird — no client limit, depends on server configuration
Why Do Attachments Get So Large?
Smartphone cameras produce photos of 5–15 MB each. Scanned PDFs quickly reach 10–30 MB. And email attachments are Base64-encoded — adding roughly 33% to the file size. An 18 MB file becomes ~24 MB during transmission, exceeding the 25 MB limit.
How the Email Compressor Works
Drag & drop your files into the tool. The compressor detects the file type automatically and applies the right strategy: images are quality-optimized, PDFs are internally compressed. Multiple files can additionally be bundled into a ZIP archive.
Common Use Cases
- Send job application documents via email
- Email photos to family members
- Send receipts and invoices to your accountant
- Attach presentations and reports to emails
- Compress documents for insurance or government submissions
Privacy
All files are processed exclusively in your browser. Nothing is uploaded, nothing is stored. Ideal for confidential documents like payslips, contracts, or medical records.