Mastodon
Platform Limits
Feature | Post |
Caption | Max 500 characters (default, varies by instance) |
Images | ✅ (up to 4 images) |
Image size | 40MB max (default) |
Videos | ✅ (1 video) |
Video length | Up to 40 minutes |
Video size | 40MB max (default) |
Video formats | MP4, WEBM (H.264 codec, AAC audio) |
Image formats | JPG, PNG, GIF, WEBP |
Image resolution | Min 320x240, Max 1920x1920 |
Video resolution | Min 320x240, Recommended 1280x720 |
Frame rate | 24-60 fps |
Aspect ratio | Flexible |
Mixed media | ❌ (images or video, not both) |
Note: Limits may vary depending on the Mastodon instance.