MastodonMastodon Photo Resizer
Resize and crop images to platform-recommended dimensions.
Click to upload or drag and drop
PNG, JPG or JPEG
How to use the Mastodon Photo Resizer
Mastodon automatically crops or compresses images that don't match its recommended dimensions, often cutting off important parts of the image. Uploading the correct size ensures your photo displays exactly as intended.
- 1.Upload your image or drag it into the tool above
- 2.Select the Mastodon image type you need (profile picture, cover photo, post image, etc.)
- 3.Download the resized image, ready to upload directly to Mastodon
Why use the Mastodon Photo Resizer?
Mastodon crops or compresses images that don't match its recommended dimensions, often cutting off faces or text. This resizer outputs the exact pixel sizes Mastodon expects — profile pictures, banners, and post images — so your photos display sharp and uncropped. Ideal for decentralized, community-run, ad-free social users who post visuals regularly.
Mastodon specifics
- Profile Picture
- 400 × 400 px
- Header
- 1500 × 500 px
- Post Image
- 1200 × 630 px
Tips for Mastodon
- Start from the highest-resolution original — upscaling a small image looks soft on Mastodon.
- Keep important content away from the edges in case Mastodon crops for previews.
- Export as PNG for graphics and JPG for photos to balance quality and file size.
Frequently asked questions
What image sizes does Mastodon use?
Mastodon recommends Profile Picture at 400×400px, Header at 1500×500px, Post Image at 1200×630px. This tool resizes to any of these in one click.
Will resizing reduce my photo's quality?
Resizing down to Mastodon's exact dimensions preserves quality and actually looks better than letting Mastodon compress an oversized upload. Avoid upscaling small images.
Is the Mastodon photo resizer free?
Yes — free, no watermark, and no sign-up. Images are processed in your browser, so they're never uploaded to a server.
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