This Free Tool Makes Large Files Small Enough to Email

You attach a photo, hit send, and the email bounces back: “attachment too large.”It’s one of the most common digital roadblocks, and it almost always comes down to one number. Most mail services cap attachments at around 25 MB — Gmail allows up to 25 MB per message, and other providers sit close to that. A single modern phone photo can already be 5–12 MB, so a handful of them blows past the limit fast.

The fastest fix: compress the image in your browser

You don’t need to email yourself, install an app, or upload anything to a stranger’s server. A browser-based image compressor shrinks the file right on your device. Our own Image Compressor does this, and so does Google’s open-source Squoosh — its team notes that “images never leave your device since Squoosh does all the work locally.” That local processing matters: if the photo is a payslip, an ID, or anything private, it never touches the cloud.

How to do it

1. Open the compressor and drop your image in.
2. Lower the quality slider until the size comfortably clears the limit. Aim for under 10 MB — receiving servers sometimes cap lower than sending ones.
3. Download the smaller file and attach that copy to your email.

For most photos you can cut the size by half or more before any difference is visible. Heavy compression will eventually soften detail, so check the preview if image quality matters.

When compression isn’t enough

Video and multi-gigabyte files won’t fit in any inbox no matter how hard you compress. For those, send a link instead of an attachment: upload to a cloud drive and paste the share link. Gmail’s own guidance is to use a Google Drive link once a file is over the limit. It arrives instantly and never clogs the recipient’s inbox.