WordPress Image Alt Text with AI: A Practical Workflow

Alt text is a text alternative for someone who cannot use the image. A label such as “image of chart” rarely carries the information they need. The same picture may need different wording on two pages because its purpose changes with the surrounding text. The W3C’s alt decision tree starts with that purpose.

Classify the image before asking for words

These are illustrative descriptions; the final wording depends on the real image. The W3C distinguishes informative, decorative and functional images, and recommends a fuller text equivalent for complex graphics. A concise alt attribute cannot carry an entire chart’s data.

Give AI the page context

If you use an AI tool, provide the image and the sentence or paragraph that introduces it. State whether the image is a screenshot, a functional link, a chart or decoration. Ask for one concise candidate that conveys only what is visible and relevant. If the image contains private customer data or an unpublished interface, use an approved tool and sharing process before sending it outside the site.

This image appears in a WordPress tutorial about [task].
The nearby paragraph already says: [text].
Describe only the image information a reader needs for that task.
Do not guess hidden settings, names, numbers or outcomes.
If the image is decorative or repeats nearby text, say so instead of forcing a description.

Treat the suggestion as a draft. Check whether it invents a button label, misreads small text, assumes a result the screenshot does not show, or repeats the caption. Remove “image of” when the image type adds nothing; keep words such as “screenshot” or “bar chart” when they help explain the content.

Make the decision in WordPress

1. Select the Image block in the post and inspect its purpose in the surrounding section.
2. For an informative image, enter the final alternative text in the block settings. For decoration, use WordPress’s Mark as decorative control.
3. For a linked image, test the link and ensure its accessible name communicates the destination or action.
4. For a complex chart, add the detailed numbers or relationships in the page body, table or nearby explanation. Use the short alt text to identify the chart.
5. Preview the page and inspect the rendered image. Check whether the alternative text still fits after cropping, replacing or reusing the image.

The WordPress Image block documentation explains that alt text entered in a block applies to that image on that post; alt text saved in the Media Library is a default when the image is inserted elsewhere. Check every reuse in context.

A small before-and-after test

Suppose a tutorial screenshot shows the WordPress Image block with the Alternative text field open. “WordPress screenshot” says little. “Alternative text field in the Image block settings sidebar” identifies the control the reader needs. If a red arrow is the only way to find it, mention the position in the surrounding instructions as well.

Now imagine the same screenshot is used only as decoration beside a paragraph that already names and explains that field. The repeated description may add noise. Mark the image decorative if it contributes no new information or function. This is a page-level decision, not a rule that every screenshot must have the same alt text.

Final check before publishing

Read the paragraph, alt text and caption aloud in sequence. If the alt repeats nearby prose, omit the duplicate. If the image contains information absent from the text, add the missing meaning. Check charts against the actual values. An AI suggestion can speed up drafting, but only a review of the real page can establish whether the alternative works for this image.

Frequently asked questions