Original image
Compressed image
Original Compressed
Fit

Nothing to compare yet.

Versions tried

Every version here is real and ready. Tap one to keep it instead.

How this was measured

Format
Visual match
Dimensions
Time

Just this image

Compress a video small enough to email

Gmail and Outlook stop at 25 MB, and attachments are encoded in a way that inflates them on the way out — so the number that actually matters is nearer 18 MB. This page opens with that target already set.

The clip is re-encoded on your own device and measured against your original, so what you attach is a file whose quality has been checked rather than assumed. Nothing is uploaded to reach that answer, which for a personal video is the whole point.

Your pictures never leave your computer: the compression runs in your browser, on your own device, and you can verify that yourself in about a minute. After one visit it even works with no internet at all.

This page is Pocketsize with the plan pre-set for one job. Nothing is locked — change any control once it is open.

Why 18 MB and not 25?

Mail attachments are re-encoded for transport, which adds roughly a third to their size. Aiming at 25 MB would produce files that arrive too big.

Can I send a longer video another way?

For anything long, a link from a file-sharing service beats an attachment. This is for the clip that nearly fits.

Pocketsize

Every picture is saved several ways, measured against the original, and the smallest one that still looks right is kept. Nothing ever leaves your computer — after one visit, it even works offline.

Spacehold to flick between before and after — the fastest way to spot a difference
Ddifference heatmap
Ffocus mode — just the comparison
Escleave focus mode
move through the pictures
Deleteremove the selected picture
?this card

The same engine as a command line: pip install pocketsize · source & licence

This format cannot store transparency