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Mastodon
Mastodon 3:1 · 1500×500

Mastodon Banner

Resize any image to 1500×500 pixels (3:1 aspect ratio) in your browser — no upload, no login, no paywall. Mastodon profile banner spec.

Browser-side · your image never leaves your device
Unlimited

Drop an image here

or click to browse · JPEG / PNG / WebP · up to 50 MB

By uploading, you agree to our Terms of Service and Privacy Policy. Your images are processed locally in your browser and never leave your device.

Need to remove the background first? Try PicPeel →

Spec details

Output size
1500×500
Aspect ratio
3:1
Max file size
2 MB
Formats
JPEG, PNG, GIF
lossless

💡 For best results, start with an image at least as wide as the target size. Upscaling small images can introduce blur.

Mastodon profile banner size: the 2026 spec

This guide covers the official spec, format requirements, and the practical workflow imgsize.cc uses to get it right in your browser.

Why these dimensions

Mastodon profile banners render at 1500×500 on the profile page. The 3:1 aspect ratio is recommended. Mastodon supports animated GIF banners.

Specification breakdown

The "safe area" inside the frame

Crop the central content of your image to the central 80% of the frame. Mastodon Banner may crop or overlay UI elements near the edges, so critical content should stay well within the safe zone.

Common mistakes

Frequently asked questions

Can I use a GIF banner?

Yes! Mastodon supports animated GIF banners.

How imgsize.cc handles it

Drop your source image into the workbench above. The crop box defaults to a 3:1 aspect ratio matching Mastodon's banner spec. Resize, crop, and download as a 1500×500 pixel PNG — all in your browser, no upload required.