Missing Image Alt Text on Your Site? Why It Matters

2. What Image Alt Text Is and What “Missing” Means

Quick Answer: Image alt text (the “alt attribute”) is a short line of text that describes an image for anyone or anything that can’t see it — Google, screen readers, and browsers when an image fails to load. “Missing” alt text means the field was simply left blank, so the image has no description at all.

Every image on a web page has a hidden text field called the alt attribute. You write a short description there — say, “Baker sliding a tray of bread into an oven” — and it does the work whenever the image can’t be seen. That field sits on every image on your business website, filled in or not.

Alt text stands in for the image in three situations:

• Search engines read it to understand what the picture shows, since they can’t fully “see” an image the way a person does.
• Screen readers read it aloud to visitors who are blind or low-vision.
• Browsers show it as text when the image is slow, broken, or blocked.

When the field is blank, all three get nothing. That’s what “missing alt text” means — not wrong text, but no text at all. There’s one exception worth knowing early: some images are purely decorative and should have a deliberately empty alt, which we’ll cover further down.

3. How Many of Your Images Are Missing Alt Text?

Quick Answer: On most unaudited Malaysian SME websites, more than half of content images are missing meaningful alt text — often the clear majority. Homepage banners and hero images are usually the worst, because they’re added through a page builder that never prompts for a description.

When we audit a new client’s site, the number of images with no alt text is almost always higher than the owner expects. Here’s the split we typically see before any cleanup, on a business site left on autopilot.

The pattern is consistent: the images that matter most for a first impression — big homepage banners — are the ones most often left blank, because page builders drop them in without ever asking for a description.

4. Why Missing Alt Text Hurts More Than It Looks

Quick Answer: Missing alt text costs you on three fronts: lost visibility in Google Images, a broken experience for screen-reader users, and a blank space when an image fails to load. For a business that sells on visuals — food, property, products — the search cost alone is real.

It’s easy to shrug at an empty field you can’t even see. The real cost shows up in three places:

• Google Image search. Google leans on alt text to understand what a picture shows, and its own image SEO guidance makes that plain. No description, no clear signal — so your product and project photos rarely surface in image search, where plenty of Malaysian buyers browse before they visit.
• Accessibility. Screen-reader users hear “image” or a raw filename instead of a description. For a real slice of your visitors, that’s a wall — and it reflects how much care your site shows everyone else.
• Broken-image fallback. When an image doesn’t load, the alt text is what shows in its place. With none, the visitor just sees an empty box.

That last point connects to bigger issues. If images regularly fail to load, the cause may be your website being down and not loading, or heavy images slowing your site on mobile. Alt text is the safety net for those moments.

5. What Good Image Alt Text Looks Like (vs Bad)

Quick Answer: Good alt text describes what the image shows in a short, natural phrase — usually under about 125 characters. Bad alt text is a filename, the word “image”, or a stuffed list of keywords. Same picture, very different result for both search and accessibility.

The gap between weak and strong alt text is small to write but big in effect. Here are a few common images done both ways.

Notice the strong versions read like a sentence you’d say out loud, not a search phrase. That’s the test: if it sounds natural read aloud, it’s working. The stuffed café example does the opposite — spam to Google, nonsense to a screen reader.

6. How to Find and Fix Missing Alt Text: Step by Step

Quick Answer: Fix missing alt text by auditing your site to list images with no description, tackling your most important pages first, then writing a short, honest description for each in the Media Library or block editor. Mark purely decorative images with an empty alt so screen readers skip them.

This is the order we work through on a WordPress site — each step chips away at the backlog.

1. Run an audit. Use a free crawler or your SEO plugin to list every image that has no alt text, so you know the real size of the job instead of guessing.
2. Fix your money pages first. Start with the homepage, service and product pages, and your top blog posts — the pages that earn enquiries — before touching older, quieter ones.
3. Add the description in the Media Library. Open each image, find the “Alt Text” field, and type a short phrase describing what it shows. No code needed.
4. Mark decorative images empty. For background flourishes and dividers, set an empty alt (alt="") so screen readers skip them instead of announcing clutter.
5. Skip the keyword stuffing. One natural description per image, not a list of search terms. Overloading the field does more harm than good.
6. Make it a habit. Add alt text every time you upload a new image from now on, so the backlog never rebuilds.
7. Re-check after big changes. A theme switch, migration, or bulk image tool can strip alt text — so spot-check after any of them.

You don’t need to clear the whole site at once. Fixing the top pages first captures most of the benefit; the rest can follow over a few short sessions.

7. How to Handle Alt Text by Image Type

Quick Answer: Not every image needs a description. Informative images get a short caption of what they show; functional images like a logo that links home describe the action; decorative images get an empty alt so screen readers skip them; and images of text should repeat the words exactly.

The single most useful idea in alt text is that decorative images should be left deliberately empty, not described. The W3C’s alt decision tree sorts every image into a few types, and each type gets handled differently. Here’s the short version.

Getting the decorative ones right matters as much as describing the informative ones. A screen reader forced to announce “divider swirl” ten times down a page is worse than one that glides past them silently.

8. What Changes After You Add Alt Text

Quick Answer: Once alt text is in place, your images become readable to Google and screen readers, your photos start showing up in image search over time, and a failed image shows helpful text instead of a blank box. It’s a one-time cleanup with a lasting payoff.

Owners are often surprised that a quiet, behind-the-scenes fix changes anything they can point to. Here’s the before-and-after we see on a typical client site.

None of this happens overnight — image-search gains build over the weeks Google takes to re-crawl your pages. But the fix is permanent, and a site where every image is described simply feels cared-for. That’s part of not letting yours drift into an outdated website that’s losing customer trust.

9. Mistakes That Make Alt Text Useless

Quick Answer: The common alt text mistakes are stuffing keywords, starting every line with “image of”, describing decorative images that should be empty, and copying the same alt text onto every photo. Each one either annoys screen-reader users or trips Google’s spam signals.

Once you start adding alt text, a few habits quietly undo the benefit:

• Keyword stuffing. A string like “cafe KL best coffee cheap cafe Petaling Jaya” reads as spam. Google explicitly warns against stuffing alt attributes, and it can hurt more than it helps.
• “Image of…” on everything. Screen readers already announce that it’s an image. Just describe the content and drop the prefix.
• Describing decorative images. A background flourish doesn’t need a description. Give it an empty alt so it’s skipped, rather than adding noise.
• Copy-pasting one description everywhere. Identical alt text on twenty photos tells Google and screen readers nothing useful about any single one of them.
• Treating it as a one-off. New uploads arrive blank unless you fill them in — the same way small upkeep jobs like clearing blog spam comments need a habit, not a one-time blitz.

There’s a marketing knock-on too. A neglected, poorly-tagged page that you also send paid traffic to can feed into bigger problems — in the worst case contributing to getting your Google Ads disapproved over a low-quality landing experience. Tidy images are one small part of a page that earns trust.

10. Conclusion

Missing image alt text stays invisible until you know to look — then you spot it everywhere. The fix is simple: describe each meaningful image in a short, honest phrase, leave purely decorative ones empty, and add alt text on every upload from now on.

Done once across your key pages, it opens up Google Image traffic, makes your site usable for everyone, and quietly signals a business that looks after the details. If you’d rather it were simply handled, ZenWeb audits and fixes alt text as part of our web design and maintenance service.

11. Frequently Asked Questions

1. Is image alt text really a Google ranking factor?

Yes, mostly for image search. Google uses alt text to understand what a picture shows, which helps your photos rank in Google Images and adds context to the page. It won’t rocket a weak page up the normal results on its own, but for visual businesses the image-search traffic is real and worth having.

2. How long should alt text be?

Short — usually a phrase of a few words up to around 125 characters. Describe what matters in the image and stop. Screen readers read the whole thing aloud, so a rambling paragraph is tiring to listen to. One clear sentence almost always does the job better than a long one.

3. What’s the difference between alt text and the image title or caption?

Alt text is the hidden description used by search engines and screen readers when the image can’t be seen. A caption is visible text shown under the image for everyone. The image “title” is a rarely-useful tooltip. For accessibility and SEO, alt text is the one that matters — focus your effort there.

4. Do decorative images need alt text?

No — they need a deliberately empty alt (alt=""). Purely decorative images like dividers and background flourishes carry no information, so a screen reader should skip them. Leaving the alt empty tells it to do exactly that. Adding a description to decoration just creates clutter for the people relying on a screen reader.

5. Will adding alt text to old images help, or only new ones?

It helps both. Google re-crawls your existing pages over time, so alt text you add to older images gets picked up on the next crawl. Screen-reader users and the broken-image fallback benefit immediately. There’s no need to wait for a redesign — fixing your current images pays off on its own.