Mastodon Header Resizer
Mastodon Header uses a 1500×500 pixel canvas. This preset exports JPG; review the source requirement and final crop before uploading.
Sizes, to scale
Mastodon Header size
Mastodon Header size: 1500×500 px after downscaling
The header appears on profiles and profile cards; server-specific upload limits can vary.
1500
width (px)
500
height (px)
3:1
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 Header?
- 1
Step 1: Upload your image
Select the photo you want to resize for Mastodon Header. Drag and drop or click to browse. We support JPG, PNG, WebP, and HEIC.
- 2
Step 2: Automatic resizing
Apply the 1500x500 pixel preset for Mastodon Header, 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 Header?
Mastodon Header uses 1500×500 px after downscaling. The header appears on profiles and profile cards; server-specific upload limits can vary.
What file does this Mastodon Header resizer download?
This preset downloads a 1500×500 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.
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 Header Image Into a PDF
Put one image on each page, arrange the order, and create the PDF in your browser.
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