Media Requirements
Image and video requirements for Bluesky posts.
Images above these limits are compressed, and quality can drop. Videos outside them are rejected.
Images
| Property | Requirement |
|---|---|
| Max images | 4 per post |
| Formats | JPEG, PNG, WebP, GIF |
| Max file size | 1 MB per image |
| Max dimensions | 2000 x 2000 px |
| Recommended | 1200 x 675 px (16:9) |
| Orientation | Ratio | Dimensions |
|---|---|---|
| Landscape | 16:9 | 1200 x 675 px |
| Square | 1:1 | 1000 x 1000 px |
| Portrait | 4:5 | 800 x 1000 px |
Videos
| Property | Requirement |
|---|---|
| Max videos | 1 per post |
| Format | MP4 |
| Max file size | 50 MB |
| Max duration | 60 seconds |
| Max dimensions | 1920 x 1080 px |
| Recommended | 1280 x 720 px, 16:9 or 1:1, 30 fps, H.264 video, AAC audio |
Hosting rules for media URLs are in Media uploads.
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