Missing image alt text and intentionally empty alt text are different. An informative image needs a useful text alternative. A purely decorative image can use alt="". Before fixing an audit warning, identify what the image contributes and whether it acts as a link or button. Adding keywords to every image can make the page less useful.

This guide helps business owners decide which warnings need attention, write appropriate alternatives and verify the published page. The examples are illustrative, not findings from a customer website.

What does a missing alt text warning actually mean?

Alt text is the alternative text associated with an image in HTML. A checker may flag an absent attribute, an empty value or both. Those conditions require different decisions, so read the individual finding rather than relying on a summary score.

Image markup	Meaning	Next check
<img src="mug.jpg">	No alt attribute supplied	Determine the image’s purpose and add the appropriate attribute.
<img src="wave.jpg" alt="">	Empty alternative supplied	Confirm the image is decorative or redundant in this context.
<img src="mug.jpg" alt="Blue ceramic mug with a wide handle">	Descriptive alternative supplied	Check that the description fits the actual image and its purpose.

The W3C guidance on decorative images explains why an empty attribute differs from leaving the attribute out: some screen readers may announce a filename when no alternative is supplied. A deliberate empty value helps avoid unnecessary announcements for decoration.

First decide what the image does

Ask what a visitor would lose if the image disappeared. Would they miss a product detail, an instruction, a destination or nothing essential? The answer depends on the surrounding content, not just the file itself. W3C’s alt decision tree, updated on 13 May 2024, is a useful reference for making that judgement.

Informative images: describe the useful detail

A product photo may show a shape, finish or viewing angle that helps someone choose. A process photograph may explain how two parts fit together. Describe the information relevant to that page.

Illustrative example: On a mug product page, “Blue ceramic mug with a wide handle, side view” is more useful than “product image.” For a close-up, “Speckled blue glaze around the mug’s rim” communicates a different detail. Do not invent a material, size or certification from appearance alone.

Decorative images: do not manufacture a description

A coloured flourish behind a heading may add atmosphere without adding information. If it is an HTML image and serves only that purpose, empty alt text can be appropriate. Do not replace it with “best website development company” simply to remove an SEO warning.

Keep a short note explaining the decision when you review a site with others. “Background wave; no content or function” is more useful to the next editor than an unexplained exception.

Linked images: explain where the action leads

An image that is the only content of a link needs an accessible name that explains the destination. A linked business logo might use “Example Studio home.” A brochure cover linking to a PDF might use “Download the product brochure.”

If the same link already contains clear visible text, the image may be redundant and use an empty alternative. Check the complete link, including its text and any other accessible naming. Do not judge the image in isolation. W3C’s functional-image guidance explains these distinctions.

How to check image alt text on a website

Start with one important page rather than editing every file at once. Choose a service page, product page or article that customers actually use.

1. Record the exact page URL. The same image can appear in several places with different purposes.
2. Identify the image on the page. Match a report’s source URL or thumbnail to the visible element.
3. Inspect the element in your browser. For a regular HTML image, locate the img element and check whether alt is absent, empty or populated.
4. Read the surrounding heading, paragraph and link. Decide what the reader needs from this particular use.
5. Record the intended fix. Write the replacement text, or explain why the empty value should remain.

For background images or SVG icons, ask your developer to check the appropriate accessibility implementation; the ordinary img workflow does not cover every image technology.

For an introduction to our analyzer, visit the Ishu Technology SEO analyzer overview. You can then open the SEO Analyzer to review the options currently available. Apply the manual checks in this guide to any image-related findings you receive. An automated flag still needs a decision about the image’s role.

Write alt text around meaning, not a keyword quota

Google’s image SEO documentation says it uses alt text alongside page content and image understanding. It recommends relevant descriptions and warns against keyword stuffing. That supports a simple approach: name the subject and the detail that matters, using natural language.

Weak example: “wallpaper wallpaper Jaipur best wallpaper buy wallpaper.”
Clearer example: “Green leaf wallpaper covering the wall behind a cream sofa.”

The second description gives someone useful information. Include a location only when it is relevant and known, such as an identifiable business entrance. A business serving Jaipur does not need “Jaipur” in every product photo’s alt text.

Avoid filling the field with everything visible. Google’s helpful alt text lesson, updated on 17 April 2025, emphasises context and concise meaning. If a detail does not help explain why the image is there, consider leaving it out.

Handle charts and text-heavy images separately

A chart, map or detailed diagram may need more than a short alternative. Give it a concise identification, then provide the essential information in nearby text, a table or a linked longer description. W3C’s complex-image guidance describes this approach.

For example, an illustrative delivery-zone map could have the alternative “Delivery zones; covered areas listed below,” followed by the actual areas and conditions in readable page text. Check that the list stays synchronised when the map changes.

Likewise, if an offer banner is the only place showing a deadline or an exclusion, make that information available as text. A decorative label cannot replace the offer’s essential terms.

Fix the page and verify the result

Make a small, reviewable batch of changes. A useful working record has four fields: page URL, image, intended alternative and verification status. Add an owner if a developer must change a shared template.

Update the image where the page gets its markup. Depending on the editor or theme, that might be a page-level image setting, a media record or a template. Do not assume that changing a library entry automatically updates every existing occurrence.

After saving, reopen the public page and inspect the rendered image again. If the old value remains, check the page’s own settings and any relevant cache. Review mobile layouts and repeated components too. Where possible, test how meaningful images and image links are announced with a screen reader.

Rerun the same checker if you used one, but judge success by the corrected content and behaviour. Keep justified decorative exceptions documented. A better score alone does not demonstrate complete accessibility or improved rankings.

Frequently asked questions

Does every image need a written description?

No. Informative images need an appropriate alternative; decorative or redundant HTML images can use an empty alt attribute. Images that provide a link or button’s only label require particular care.

Can I copy the page title into every image?

Usually that produces repetitive, unhelpful alternatives. Describe each image’s contribution. Different product views often communicate different details, even when they belong to the same page.

Can AI write the alternatives for me?

It can help draft wording, but review the actual image and page context yourself. Remove guessed attributes, irrelevant detail and promotional language before using a suggestion.

Should I remove a decorative image because an audit flags it?

Not automatically. Confirm its purpose and implementation first. A correctly empty alternative can be intentional; document the reason rather than adding misleading text to satisfy a checker.

Need help resolving image warnings?

Send Ishu Technology an enquiry with the affected page URLs, your editor or platform and the warning you are unsure about. Explain whether the problem affects one page or a shared template so the review can focus on the right fix.