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Bluesky specifications

Find current Bluesky specifications for profiles, posts and shared media. Compare dimensions, aspect ratios, file formats and source guidance.

6 specifications 0 official 6 recommended

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Showing 6 specifications

Profile Photo

Recommended
Dimensions400×400
Aspect ratio1:1
FormatImage
File typeJPG, PNG
File sizeUp to 1MB
Status Recommended canvas
Reviewed
Source Official schema
NotesRecommended square canvas. Bluesky’s official schema limits avatar blobs to 1,000,000 bytes but does not mandate fixed dimensions.

Header Photo

Recommended
Dimensions1500×500
Aspect ratio3:1
FormatImage
File typeJPG, PNG
File sizeUp to 1MB
Status Recommended canvas
Reviewed
Source Official schema
NotesRecommended 3:1 canvas. Bluesky’s official schema limits banner blobs to 1,000,000 bytes but does not mandate fixed dimensions.

Post Image (Square)

Recommended
Dimensions1080×1080
Aspect ratio1:1
FormatImage
File typeJPG, PNG
File sizeUp to 2MB
Status Recommended canvas
Reviewed
Source Official schema
NotesRecommended square canvas. Bluesky allows up to four images per post and limits each image blob to 2,000,000 bytes.

Post Image (Landscape)

Recommended
Dimensions1200×627
Aspect ratio1.91:1
FormatImage
File typeJPG, PNG
File sizeUp to 2MB
Status Recommended canvas
Reviewed
Source Official schema
NotesRecommended landscape canvas. Bluesky’s official schema sets a 2,000,000-byte image limit but no fixed dimensions.

Post Image (Portrait)

Recommended
Dimensions627×1200
Aspect ratio4:5
FormatImage
File typeJPG, PNG
File sizeUp to 2MB
Status Recommended canvas
Reviewed
Source Official schema
NotesRecommended portrait canvas. Bluesky’s official schema sets a 2,000,000-byte image limit but no fixed dimensions.