Alt Tag Viewer
By: Mike Young
This Firefox add-on displays a tooltip showing the alt text and filename of an image when you hover over it, providing a quick and easy way to check the SEO relevance of image attributes.
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Features & Capabilities
User Growth & Download Statistics
Manifest V2 Add-on
- By:
- Mike Young
- Daily users:
- 91 1
- Rating:
- 4.33 (3)
- Version:
- 0.1 Last updated: 2024-05-14
- Version code:
- 5741715
- Creation date:
- 2024-05-13
- Risk:
- Moderate risk impact Low risk likelihood
- Permissions:
- activeTab
- <all_urls>
- activeTab
- Content scripts matches:
- <all_urls>
- <all_urls>
- Size:
- 16.72KB
- Email:
- mr*****@gmail.com
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-03
- Compare stats and ranking:
- Alt Tag Viewer vs Image Alt Viewer
- Alt Tag Viewer vs Image Alt Text Reader
- Alt Tag Viewer vs Image Alt Text: Reveal Tags & Boost Accessibility
Ranking
For Developers
Contact the developer
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User Reviews
Works, but not quite the way I'd like. When you turn it on, you can only see alt text by hovering over an image (so you can't see the alt text of all images on a page). And when an image doesn't have alt text, it shows the filename as the alt text, which is confusing. So if those could be changed, I would be happy to give this 5 stars.
by Da*****, 2025-06-16
The add-on works well! It's simple and easy to use. However, I would greatly appreciate having the ability to have the feature turned off by default and turn it on when needed. This is because I do not need the pop-up on every image of every URL and it becomes annoying quite quickly. :)
by Fl*****, 2025-02-20
Does what it says :) (though I use it for checking screen reader accessibility)
by ka*****, 2025-01-26
Is Alt Tag Viewer Safe?
Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
Alt Tag Viewer requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.
Alt Tag Viewer has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
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