Compress Images for Email

Email attachment limits and why size matters

Major providers allow large messages overall—Gmail roughly 25MB per message including attachments, and Microsoft Outlook commonly around 20MB—but that is not an invitation to send huge photos. Smaller attachments upload faster on mobile data, are less likely to hit corporate mail filters, and are easier for recipients to preview on phones. Aiming under about 1MB per image keeps messages snappy without touching those upper caps.

Inline images vs attachments

Compressed JPEGs work well for both inline embedding and traditional attachments. Inline images still count toward message size and affect how quickly a thread loads in Gmail, Outlook, Yahoo Mail, and Apple Mail. When you shrink files proactively, you reduce bounce-backs from strict corporate limits and make “download full message” less painful on slow connections.

Sending multiple images

When you attach several vacation photos or product shots, their sizes add up fast. Keeping each image under 1MB leaves headroom for signatures, replies, and other attachments. Use batch mode here to apply the same target to every file, then download a ZIP if you prefer one package—still processed privately in your browser.