Magic Resizer
Free Mastodon Image Resizer
Resize your images to Mastodon’s recommended 1280 × 1280 so they stay sharp after the server downscales them.
Everything happens in your browser, no software to install, no account required for your first five images.
Your images stay on your device, nothing is uploaded to Buffer.
Resize images for other networks
Mastodon image sizes & requirements
Use these recommended sizes for the sharpest Mastodon images, and keep within the upload limits below so nothing is rejected or compressed.
| Format | Size (pixels) |
|---|---|
| Square post | 1280 × 1280 |
| Landscape post | 1280 × 720 |
Upload requirements
- Larger images are downscaled to about 1.6 MP.
Sizes and formats are based on Buffer’s ideal image sizes and formats guide.
FAQs
What is the best image size for Mastodon?
What is the best image size for Mastodon?
The recommended Mastodon image sizes are: Square post (1280 × 1280 px), Landscape post (1280 × 720 px). Buffer's free image resizer crops and resizes your photo to each of these in one step.
What image formats does Mastodon support?
What image formats does Mastodon support?
Mastodon accepts JPG, PNG. The maximum file size is 8 MB.
Do I need a Buffer account to resize Mastodon images?
Do I need a Buffer account to resize Mastodon images?
No. You can resize up to 5 images without an account. After that, create a free Buffer account to keep resizing for free.
Are my images uploaded to a server?
Are my images uploaded to a server?
No. All resizing happens directly in your browser, so your images are never sent to or stored on Buffer's servers.
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