BlueSky Post Specifications 2025
Complete guide to BlueSky post dimensions, character limits, and media specifications for 2025. Create engaging posts on the decentralized social network with perfect formatting.
Quick Specs
Dimensions & Resolution
Maximum 1000px on longest side
Great for landscape photos
Works well for portraits
Vertical format supported
Important Notes
BlueSky is a decentralized social media platform built on the AT Protocol. Posts (called "skeets") support up to 300 characters with rich media. The platform emphasizes open protocols and user control over algorithms. Images are limited to 1000px on the longest side with a 1MB file size limit per image.
Optimization Tips
- ✓Keep text under 300 characters per post
- ✓Images max 1000px on longest side, 1MB each
- ✓Add up to 4 images per post
- ✓Use alt text for accessibility
- ✓Profile photos are 400×400px
- ✓Banner images are 1500×500px (3:1 ratio)
- ✓No GIF support - use static images or video
- ✓Thread posts for longer content
Sources & Verification
Last verified: 2025-09-28
300 character limit, up to 4 images (1MB each, 1000px max). No GIF support.
Profile & Page Dimensions
Content Limits
Text Limits
Media Limits
features
protocol
Built on open AT Protocol for data portability
algorithmic
Schedule BlueSky posts at optimal times
Frequently Asked Questions
What's the character limit on BlueSky?
BlueSky posts have a 300 character limit, slightly longer than Twitter's original 280. You can create threads by replying to your own posts for longer content.
How many images can I add to a BlueSky post?
You can add up to 4 images per post. Each image must be under 1MB and no larger than 1000 pixels on its longest side.
Does BlueSky support GIFs?
No, BlueSky doesn't support animated GIFs. You can only upload static images (JPEG, PNG, WebP) or videos for motion content.
What's the best image format for BlueSky?
JPEG works best for photos to keep file size under 1MB. PNG is good for graphics with text. WebP is also supported for better compression.
Recent Updates
BlueSky maintains 300 character limit with support for up to 4 images per post
Image upload quality improved with better compression algorithms
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