How to Add Alt-Text on Twitter

How to enable the composition of image descriptions from twitter.com

  1. Click on the more icon and select Settings and privacy from the dropdown.
  2. Click Accessibility from the list of settings.
  3. Find the Compose image descriptions checkbox.
  4. Check the box to turn the setting on or off.

How to add image descriptions in Tweets from twitter.com

  1. Click on the Tweet compose button
  2. Attach your photo(s).
  3. To insert descriptive text, click Add description beneath the image

    Jim Halpert from The Office (US version) holding a pie chart: 60% Procrastination; 39% Distracting Others; 1% Critical Thinking
    Jim Halpert from The Office (US Version) (c) 2007 NBC Universal Television.
  4. Type your description of the image and click the Done button (The limit is 420 characters).

For tweets with multiple images, you must add each description separately.

Note: Image descriptions cannot be added to GIFs or videos. When using GIFs or videos, manually add a description in square brackets of the image at the end of your tweet.

Example:

Jim Halpert from The Office (US version) holding a pie chart: 60% Procrastination; 39% Distracting Others; 1% Critical Thinking
Jim Halpert from The Office (US Version) (c) 2007 NBC Universal Television.

Instructions for adding Alt-Text on an iPhone or Android mobile device are available in the Twitter Help Center.