Compress Image for Email Attachment Online Free

How to Compress an Image for Email Attachment

Why Compress Images Before Attaching to Email

Large image attachments slow down email delivery, consume inbox storage, and are more likely to be flagged by spam filters. Most email providers recommend keeping individual attachments under 1MB, but for inline images — photos embedded directly in the email body — staying under 100–200KB delivers a noticeably better experience for recipients on mobile data connections. Many corporate email servers enforce hard limits of 10–25MB per message, and if you are sending multiple photos, the total can exceed this quickly. Compressing each image to around 100KB means you can attach ten photos and still stay under 1MB total. For newsletters and marketing emails, image weight directly affects open rates and engagement, since readers on slow connections may not wait for large images to load. At 100KB, images load almost instantly even on 3G connections, while still appearing crisp on desktop monitors and retina displays at typical email column widths (600px). Our tool compresses entirely in your browser — your images are never stored on any server.

• ›Email newsletters and marketing campaigns
• ›Client reports with embedded photos or screenshots
• ›Business correspondence with photo attachments
• ›Reducing total email size when attaching multiple images