It's often difficult or cumbersome to tell if images have alternative text on Twitter. Alternative (or alt) text is used to describe images for those who can't see the image, making them more accessible.
This extension shows which images are missing alternative text, and displays the alt text below the images when available.
Starting with version 0.5 it also warns users when images in a tweet have no alt text when tweeting.
Note: on TweetDeck descriptions are not displayed in the notifications column or on GIFs.
How does it work?
Install the extension / add-on on Chrome, Firefox, or Edge by downloading the correct version:
If needed, enable the extension, and you're done!
Currently the extension has the following features (accurate for version 0.5 and above)
When reading tweets
- Shows a red "No alt" label in the top left corner of images missing a description
- Displays the description of images below the images in the tweet
- Works on photos and animated GIFs for Twitter
- Only works on photos where Tweetdeck includes the image descriptions (not on GIFs and some tweets in the notifications column
- It should not impact the use of screen readers
When composing tweets
- Shows hard to miss a red "No alt" label in the "send tweet" button when images lack alt text
- Does not disable the tweet button, just in case
The following feature(s) are under consideration for future updates:
- Toggling features on or off
Update: 0.5 (14-05-2021)
Version 0.5 adds checking of alt text while composing tweets and has a few small optimizations.
Update: 0.4 (13-04-2021)
Version 0.4 improves the style on the displayed alt text for improved readability.
Update: 0.3 (27-02-2021)
Version 0.3 fixes an issue preventing alt text from displaying properly on some quote tweets on Twitter.
Update: 0.2 (26-02-2021)
Version 0.2 includes some optimizations and fixes some minor bugs:
- Prevented "null" appearing below YouTube previews on Tweetdeck
- Fixed positioning of alt text on Twitter on tweets with multiple described images
- Fixed positioning of alt text on Twitter on quote tweets with described images in the tweet and quoted tweet
Can I see the source code?
Absolutely, whether you want to learn or check for potential issues with your own plugins, you can take a look at the code. On that page the code is divided in segments with additional comments.
Questions or suggestions
If you have questions about, or suggestions for the extension, you can let me know on Twitter.