Images
- Supported formats: .jpeg, .jpg, .png, .webp, .heic/.heif (Apple format)
- Maximum file size: 16 MB
- Maximum per post: 20 images
Postpone automatically reduces oversized images to ensure successful uploads. The exact media limits may vary slightly depending on your Mastodon server's configuration.
GIFs
- Supported format: .gif
- Maximum per post: 1 GIF
GIFs cannot be combined with images or videos in the same post.
Videos
- Supported formats: .mp4, .mov, .webm
- Maximum file size: 99 MB
- Maximum frame rate: 120 FPS
- Maximum per post: 1 video
Videos cannot be combined with images or GIFs in the same post.