Alt text missing: mark images SEO- and barrier-free

Treat informal and decorative images separately

A chart with results carries different information than a purely decorative background graphic. For the diagram, the essential statement must also be accessible without an image; extensive data can additionally be available as text or table. A decorative img, on the other hand, usually gets alt="" so that it is not read out unnecessarily.

Example: Recognizing the Result

Illustrative example: An image explains the connection of a device, but does not have an alt attribute. A purely decorative background wave, on the other hand, does not contain any additional information.

<img src="anschluss.webp" alt="Netzkabel am linken Anschluss einstecken">
<img src="dekorative-welle.svg" alt="">

Limit cause and implement correction

Check the task of the image in the specific paragraph. A product photo should describe the recognizable product or relevant view, not a package of search terms. After saving, check the generated HTML and reused teasers. The same media entry can perform a different function in different contexts.

What makes you recognize a suitable correction

Provide a concise suitable alternative for the informative image. Decorative img elements with empty old; take into account the link function for linked images.

Classification and boundaries

When is this indication not a clear error?

An empty old is intended for decorative pictures and may not be corrected as missing content.

Alt text missing after CMS and cause

Many audit messages can be resolved faster if they are grouped by system, page type and technical cause. CMS indentations are only linked where alt text lacks a clearly own cause or fixed route in the respective system.

Alt text is missing in WordPressCheck theme, SEO plugin, page builder, cache plugin and media library. Alt text missing in ShopwareExamine experience worlds, category templates, product data, variants, sales channels and SEO URLs. Alt text missing in ShopifyTarget theme, collections, products, apps, metafields, markets and robots rules. Alt text missing in WooCommerceCheck WooCommerce templates, WordPress theme, SEO plugin, product data and cache specifically. Alt text missing in MagentoCheck catalog rules, layered navigation, product variants, store views, extensions and cache/indexer. Alt text missing in WixTarget SEO panel, dynamic pages, apps, redirects, and automatically generated sitemaps. Alt Text Missing in WebflowExamine collections, templates, designer settings, redirects, custom code and sitemap settings.

Frequent causes of this error

Media and image processesImage sizes, alt texts, lazy loading or media URLs are not maintained consistently or technically delivered incorrectly. Theme and page builder outputVisual builders, theme snippets, or design components generate HTML that is incomplete or contradictory to search engines. JavaScript and performance budgetToo much JavaScript, blocking resources or client-side rendering worsen crawlability and core web vitals.

Related SEO Errors

Double alt textsSame alt texts over many images are often generic and not very helpful Noindex in SitemapIf URLs are in the sitemap, but are excluded from the index via noindex Canonical is missingWhen a Missing Canonical Is Problematic—and When Not Canonical on NoindexIf the preferred URL itself must not be indexed

Appropriate Seitenreport checks

This error should not be checked in isolation. The following tools and clusters help to narrow down the cause faster and to cleanly prioritize the affected URL groups.

Image SEO CheckerCheck images, alt texts, lazy loading and file sizes.Open the check -> Performance toolsControl core web hospitals and load time signals.Open the check -> Accessibility toolsCheck alt texts, contrast, forms and usability.Open the check ->

Alt text missing: marking images SEO- and barrier-free