Rewrite Image Alt Text After Your AI Draft

AI drafts love to attach generic alt text: the post title repeated, a keyword string, or “image of SEO” above a stock photo that could live on any blog. Rewriting alt text after the draft means you look at each file, decide if it is decorative or informative, and write what a non-sighted reader needs—not what a keyword tool wants.

Early owners: proofread your AI draft before publish, rewrite H2 headings after draft, and image SEO alt text and file names (general filename and alt basics—not this post-draft pass). For featured hero images specifically, see featured image SEO for blog posts.

Place real images → classify decorative vs informative → rewrite alt to match pixels and page job → proofread captions.

Reference: W3C alt text techniques for decorative vs informative patterns.

Disclosure: AI tools are third-party. Accessibility standards evolve—confirm with current WCAG guidance and your CMS behavior.

Table of contents

1. Accessibility before SEO theater
2. When to run the alt pass
3. Decorative vs informative decisions
4. Rewrite rules that survive an editor review
5. Common AI alt failures
6. How alt fits the rewrite stack
7. FAQ
8. Fix alt on the images you actually ship

Accessibility before SEO theater

Alt text is replacement copy when the image cannot be seen. Screen reader users hear it. Search engines may use it to understand what the image depicts—not as a second title tag.

Honest priority order:

1. Does this image need alt at all? Decorative borders and spacers → empty alt.
2. What is in the image? Name the subject, action, or data—not the blog category.
3. Why is it on this page? Tie to the nearest paragraph’s point without repeating the whole article.
4. SEO last — If the primary keyword truly describes the screenshot (e.g., a Search Console UI), use it naturally once.

If I skim an AI draft’s media block, the first fix is almost always deleting keyword-shaped alt on photos that do not teach anything.

When to run the alt pass

Run after:

• Final images are chosen (not placeholder boxes).
• Body copy and headings describe the same workflow the screenshots show.

Run before:

• Final proofread—include alt strings in the last read.

Skip running alt only from the first AI prompt unless you never change images later. Swapping a screenshot without updating alt is how “Settings page” alt lands on the wrong crop.

Decorative vs informative decisions

When an image repeats a sentence already in text, alt can be shorter—do not read the entire paragraph twice unless the image adds data the text lacks.

Complex charts may need a visible caption in the body plus shorter alt; long alt alone can be hard to listen to.

Rewrite rules that survive an editor review

1. Describe pixels first — Start with what you see, not what you wish ranked.
2. No “image of” filler — Screen readers already announce images; jump to the subject.
3. One intent per alt — Do not list every tag from the post.
4. Match file reality — If you replaced the screenshot, alt must change too.
5. Avoid duplicate alt sitewide — Same stock photo with identical alt on twenty posts helps nobody.
6. Filename sanity — Descriptive filenames support context; see image SEO alt and filenames for naming—not keyword stuffing.
7. Hero images — Template often uses title as alt; in-body images need hand-written alt more often.

For AI-generated decorative AI art with no informational job, consider empty alt and a caption that admits illustration—or pick a photo that actually teaches.

Common AI alt failures

Title paste — Alt equals H1. Fix: describe the frame.

Keyword chain — “best freelance gig SEO tips 2026.” Fix: what the image shows.

Hallucinated UI — Alt names buttons that are not in the crop. Fix: re-screenshot or rewrite to match.

Empty on informative shots — AI skipped alt; CMS defaults to filename. Fix: write real alt or add caption.

Over-long story — Alt repeats three sentences. Fix: shorten; move detail to body text.

These are editorial fixes, not invented traffic case studies.

How alt fits the rewrite stack

Alt rewrite sits late in the AI publish stack:

• Body, headings, examples define what images should prove.
• Alt pass makes each informative image accessible and honest.
• Intro/title/meta siblings own SERP chrome—not alt on inline screenshots.
• Proofread catches typos in alt and captions together.

Do not merge alt work into title rewrite or keyword passes. Different surfaces, different jobs.

If you use AI to suggest alt, treat output as a draft: verify against the file, then apply the rules above.

FAQ

Frontmatter lists timing, SEO vs accessibility, decorative images, filename owner disambiguation, length, H1 repetition, proofread order, and ranking myths—worded for this URL only.

Fix alt on the images you actually ship

Open your draft in preview. Tab through images—or read alt fields in the CMS. Mark each as decorative or informative. Rewrite informative alt in one pass. Empty alt on decoration. Run proofread on captions and alt together.

One honest alt line per teaching image beats ten keyword-stuffed drafts the AI wrote before you chose the screenshot.