Bluesky Character Limits in 2026
Complete guide to Bluesky character limits for posts, bios, display names, and alt text. Understand the 300-character post limit and how to write effectively on Bluesky.
All Bluesky Character & Post Limits
| Field | Limit | Unit | Notes |
|---|---|---|---|
| Posts & Captions | |||
PostPrimary | 300 | characters | Grapheme-based counting |
| Profile & Bio | |||
Bio / Description | 256 | characters | — |
Display Name | 64 | characters | — |
Handle | 253 | characters | Domain-based |
| Other | |||
Alt Text | 2,000 | characters | — |
List Name | 64 | characters | — |
List Description | 300 | characters | — |
Bluesky Character Limit Tips
300 characters forces clarity
Bluesky's 300-character post limit is stricter than most platforms. Draft your message, then cut it to its sharpest form. Treat each post like a headline that needs to stand on its own.
Bio allows 256 characters
Bluesky bios support up to 256 characters, which is more generous than many competitors. Use this space to share who you are, what you post about, and any relevant links or credentials.
Thread for longer thoughts
Bluesky supports threaded posts where each reply in the chain gets its own 300-character limit. Use threads for tutorials, opinions, and stories that need more room to develop.
Alt text supports accessibility
Bluesky allows up to 2,000 characters for image alt text. Provide detailed descriptions for your images, as the Bluesky community actively values accessibility and inclusive posting practices.
Display names are short at 64 characters
Bluesky display names are limited to 64 characters. Your handle (username) is technically a domain name, so it can be customized with a verified domain for added credibility.
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