Mastodon Avatar Resizer
Mastodon Avatar uses a 400×400 pixel canvas. This preset exports JPG; review the source requirement and final crop before uploading.
Sizes, to scale
Mastodon Avatar size
Mastodon Avatar size: 400×400 px after downscaling
Mastodon accepts WebP, PNG, GIF, or JPG; server-specific upload limits can vary.
400
width (px)
400
height (px)
1:1
aspect ratio
Need other dimensions? Browse all Mastodon sizes or use the free image resizer for any platform.
Sources
We check platform-specific dimensions against source documentation when available.
- Mastodon documentation — Setting up your profile - Mastodon documents the dimensions used when downscaling profile avatars and headers.
How to resize images for Mastodon Avatar?
- 1
Step 1: Upload your image
Select the photo you want to resize for Mastodon Avatar. Drag and drop or click to browse. We support JPG, PNG, WebP, and HEIC.
- 2
Step 2: Automatic resizing
Apply the 400x400 pixel preset for Mastodon Avatar, then review how the image fits the target frame.
- 3
Step 3: Download and post
Review the crop and image quality, then download the resized image and upload it to Mastodon.
What size is Mastodon Avatar?
Mastodon Avatar uses 400×400 px after downscaling. Mastodon accepts WebP, PNG, GIF, or JPG; server-specific upload limits can vary.
What file does this Mastodon Avatar resizer download?
This preset downloads a 400×400 JPG file. Check the result against the destination's current file-size, transparency, and content rules before submitting it.
Will Mastodon crop or process the image after upload?
Mastodon may resize, compress, mask, or responsively crop uploaded artwork. Keep important content away from edges and inspect the destination preview before publishing.
All Mastodon Image Sizes
Choose another available Mastodon canvas and review its source notes
Sourced publishing presets
App Store and Developer Image Sizes
Prepare icons, screenshots, listing art, repository previews, and profile images with dimensions linked to current platform documentation.
Make your Mastodon profile picture
Crop a circle or square avatar, remove the background, or resize to an exact platform size.
Profile Picture Maker
Frame a photo, pick a platform size, and download a circle or square PNG.
Round Profile Picture
Crop any photo, wide or tall, into a true circle.
Round Image Corners
Keep the whole image and soften its corners.
Background Remover
Cut out the subject for a transparent PNG.
Image Resizer
Resize to an exact platform size.
File tools
Convert the resized image
Need a different file format or transparent background? Choose a focused converter, then check the preview and encoded size before downloading.
Put Your Mastodon Avatar Image Into a PDF
Put one image on each page, arrange the order, and create the PDF in your browser.
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