Bluesky Post Character Count Limit [Updated 2026]

Note: The limits below were verified against the AT Protocol lexicons (Bluesky’s own schema definitions) on 29 August 2026. Platforms change their limits, so check the lexicons if precision matters.

The character limit for a Bluesky post is 300 characters.

Bluesky, the decentralized social network built on the AT Protocol, uses a 300-character limit that sits between X’s 280 and Threads’ 500. The limit encourages short, focused posts while giving you slightly more room than X.

Character limits on Bluesky

How Bluesky compares to similar platforms

The 20-character advantage over X is subtle but occasionally useful, enough for an extra word or two. For every network at once rather than just the short-form ones, see the full table of social media character limits.

Tips for Bluesky posts

1. Be concise: 300 characters rewards clarity and brevity
2. Use alt text: Bluesky’s community values accessibility, and the protocol sets no length limit on alt text, so describe the image properly
3. Custom feeds: Bluesky’s algorithm-free custom feeds mean discoverability works differently than algorithmic platforms
4. Link posts: links include rich previews and do count toward the character limit
5. Thread for longer content: break longer ideas into connected posts

Character limit in BulkPublish

BulkPublish enforces the 300-character limit for Bluesky posts. When composing Bluesky threads, each part is individually tracked at 300 characters.