Guide
How to Reduce Image File Size for Email
Shrink large screenshots and photos so they are easier to attach and faster for recipients to open.
Start with dimensions
Many email attachments are oversized because the original dimensions are much larger than needed.
Resizing before compressing often gives you a better size reduction than quality changes alone.
A giant screenshot pasted from a high-resolution monitor rarely needs to stay that large once it becomes an attachment.
Choose the right output
For screenshots or diagrams, PNG or WebP may preserve edges better. For photos, JPEG can still be the easiest way to shrink the file aggressively.
Compare the result before sending to make sure text remains readable.
The goal is not the smallest possible file. The goal is a file that feels light without becoming frustrating to open or understand.
Keep the recipient in mind
People often open attachments on laptops, phones or slow connections. A lighter image is kinder to the person receiving it, not just to your outbox.
That is why modest resizing and sensible compression usually beat sending the untouched original.