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How to add alt text on BlueSky

Guides2/24/2026Bryam Loaiza
BlueSky compose screen with Add Description

Write or edit descriptions as you post

BlueSky supports long descriptions—around 2,000 characters. Add alt text while composing your post.

Steps

  1. Create a post and attach an image or GIF.
  2. Select Add description under the image.
  3. Edit any generated text or write your own description.
  4. Choose Done, then publish.

For galleries, add alt text to each image. Viewers can read it by tapping the ALT badge.