Make Images Smaller for Email

Most email providers cap attachments at 20 to 25 MB. A handful of iPhone photos or a few high-resolution screenshots can blow past that limit. And even when the email goes through, the recipient waits while their client downloads a 15 MB thread they could have gotten in 2 MB.

Drop an image below to convert it to a smaller JPG. The conversion runs in your browser. Nothing gets uploaded.

For iPhone photos (HEIC files), use the iPhone photo converter instead.

How much smaller will it get?

It depends on what you start with:

• PNG screenshots shrink 5 to 10x. A 4 MB screenshot becomes 400 to 800 KB.
• BMP files shrink 10 to 50x. A 6 MB bitmap becomes 200 to 600 KB. Use BMP to JPG.
• HEIC photos stay roughly the same size (HEIC is already well-compressed), but JPG is compatible everywhere. Use HEIC to JPG.
• WebP images may grow slightly when converted to JPG (WebP is more efficient), but the result is compatible with every email client. Use WebP to JPG.

Use the quality slider to push the file size down further. 85% is a good balance for email. Below 80%, compression artifacts become noticeable in photos with fine detail.

Why not just resize?

Resizing (making the image dimensions smaller) does reduce file size, but it permanently loses resolution. If the recipient needs to zoom in or print the image, they’re stuck with the smaller version. Format conversion preserves the full resolution while reducing file size through compression.

If you do need to resize, that’s a separate step this tool doesn’t handle yet. Convert first to get the format and quality right, then resize in your image editor if the file is still too large.

Sending multiple images

Right now this tool handles one file at a time. Convert each image separately. Batch conversion (multiple files at once) is coming in a future update.