Question 1

What does this tool check?

Accepted Answer

It extracts every tag from your HTML and audits the alt attribute: missing alt, empty alt (decorative), too short (< 4 chars), too long (> 125 chars), and non-descriptive (only generic words like 'image' or 'photo'). It also flags images missing width/height (CLS risk).

Question 2

Why is alt text important for SEO?

Accepted Answer

Alt text helps Google understand what images show, which can drive traffic from Google Images and Image Search. It's also used as a ranking signal for regular search (image context helps the page). And alt text is essential for accessibility — screen readers read it aloud to visually impaired users.

Question 3

What's WCAG 2.1 SC 1.1.1?

Accepted Answer

Web Content Accessibility Guidelines (WCAG) Success Criterion 1.1.1 (Non-text Content) requires that all non-decorative images have equivalent text alternatives. Decorative images can use empty alt="". Content-bearing images need descriptive alt text. This is a Level A requirement — the minimum legal accessibility standard in many jurisdictions.

Question 4

What makes alt text 'good'?

Accepted Answer

Between 4 and 125 characters, descriptive of what the image actually shows (not 'image of a car' — just 'a red sports car on a highway'), and not stuffed with keywords. If the image is purely decorative (a spacer, a border), use alt="" (empty alt) so screen readers skip it.

Question 5

What extra features does this tool have compared to others?

Accepted Answer

(1) Image count + per-issue counts. (2) Missing alt count. (3) Empty (decorative) alt count. (4) Good alt count. (5) Alt length stats (min/avg/max). (6) SEO issue list (missing dimensions, non-descriptive, etc.). (7) WCAG 2.1 accessibility issue list. (8) Export report as CSV. (9) Copy report. (10) History (localStorage, last 20) + shareable URL.

Question 6

Is my data sent anywhere?

Accepted Answer

No. All HTML parsing and analysis runs locally. History is stored in localStorage on this device only.

Image SEO & Alt Text Auditor

How to use