Who should use Alt Tag Viewer?

Alt Tag Viewer is a B2B product built for web developers and SEO professionals.

Is Alt Tag Viewer free?

Yes — Alt Tag Viewer is free to use.

What platforms does Alt Tag Viewer run on?

Alt Tag Viewer runs on the web and embeddable surfaces.

Is Alt Tag Viewer still maintained?

Unverified. Alt Tag Viewer has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to Alt Tag Viewer?

Similar projects tracked by PulseGate include Image Alt Text Reader, Alt Captioner, and Alt to title.

Who makes Alt Tag Viewer?

Alt Tag Viewer is developed by Mike Young.

How long has Alt Tag Viewer been around?

Alt Tag Viewer first shipped in 2024.

Back to the index

Alt Tag Viewer

Name: Alt Tag Viewer
Author: Mike Young

mozilla.orgImage SEO & alt text

Alt Tag Viewer is a Firefox extension that displays an image's alt text and filename in a tooltip when users hover over it. It includes a toolbar toggle for activation and helps web developers and SEO professionals review image attributes quickly.

FreeWebEmbeddable

Visit mozilla.org

Overview

5 features

Alt Tag Viewer sits in PulseGate's Image SEO & alt text category. It focuses on checking image alt text and filenames on webpages without inspecting each image manually. Alt Tag Viewer is a B2B product aimed at web developers and SEO professionals. Alt Tag Viewer is free to use. Alt Tag Viewer is available on the web and embeddable surfaces.

Mike Young builds and maintains Alt Tag Viewer, and it first shipped in 2024. Among its 5 catalogued features are alt text tooltips, filename tooltips, and toolbar toggle. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Alt text tooltips
Filename tooltips
Toolbar toggle
Hover inspection
Website-wide access

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed12 Sep · 03:31 UTC
Alt Tag Viewer verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about Alt Tag Viewer

What is Alt Tag Viewer?: Alt Tag Viewer focuses on checking image alt text and filenames on webpages without inspecting each image manually. It is catalogued under Image SEO & alt text on PulseGate.
Who should use Alt Tag Viewer?: Alt Tag Viewer is a B2B product built for web developers and SEO professionals.
Is Alt Tag Viewer free?: Yes — Alt Tag Viewer is free to use.
What platforms does Alt Tag Viewer run on?: Alt Tag Viewer runs on the web and embeddable surfaces.
Is Alt Tag Viewer still maintained?: Unverified. Alt Tag Viewer has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to Alt Tag Viewer?: Similar projects tracked by PulseGate include Image Alt Text Reader, Alt Captioner, and Alt to title.Image Alt Text Reader Alt Captioner Alt to title
Who makes Alt Tag Viewer?: Alt Tag Viewer is developed by Mike Young.
How long has Alt Tag Viewer been around?: Alt Tag Viewer first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Built for: web developers and SEO professionals
Model: B2B
Solves: Checking image alt text and filenames on webpages without inspecting each image manually.

Registered as

Firefox Add-ons: alt-tag-viewer

Developer

Mike Young

Index record

Indexed: 12 Sep 2026
Lifecycle: Alive
Last seen: 12 Sep 2026

Identity audit (13)

Slug: alt-tag-viewer-mozilla-org
Lifecycle state recorded: 12 Sept 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 12 Sept 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 12 Sept 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/alt-tag-viewer

Ship this? Send a correction — no account, and you get a link to follow it.

Similar projects

Closest matches by what these projects do