Resize an image to 400x400 for a profile avatar

Why 400x400 suits avatars

400x400 is a 1:1 square that many forums and account pages accept for a profile picture. It is large enough to look crisp when a site displays the avatar in a small circle or rounded box.

Sites often shrink an avatar for display, so starting at a tidy 400x400 gives them a clean source to scale from. The resize tool is set to 400 by 400.

Crop to 1:1 so nothing distorts

A portrait or landscape photo is not square, so dropping it straight into 400x400 stretches the face. Crop the shot to a 1:1 square first, then resize so the proportions stay correct.

Many platforms mask an avatar into a circle, which trims the corners. Keep the face centered in the square so the circular crop never clips your chin or the top of your head.

Trim the file before uploading

A 400x400 avatar is small, but a detailed photo can still carry more weight than needed. After resizing, compress the result so it uploads quickly and sits light on the page.

The resize runs locally in your browser. Your photo never leaves your device, so a personal headshot stays on your computer.

PNG for flat art, JPG for a photo

The right format for a 400x400 avatar depends on what is in it. A logo, an icon, or anything with flat colour and hard edges stays cleaner as a PNG, because lossless compression does not blur the boundaries between colours.

A photograph of a face is the opposite case. JPG stores photographic detail far more efficiently and the loss is hard to see at this size. Convert to PNG when you are working with flat art, and leave a headshot as JPG.