Bulk Image Alt Text Checker: Find Missing Alt Text
Kamran Liaquat Ali- posted on
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Enter the main homepage only. The tool will automatically detect the sitemap and scan up to 500 URLs.
Looking for your XML sitemap…
| # | Preview | Source Page | Image URL | ALT Text | Status | Recommendation |
|---|
Enter your homepage URL above and click Start Image ALT Audit. The tool reads your XML sitemap, scans up to 500 pages and lists every image with its alt text. Use the filters for Missing ALT, Empty ALT and Duplicate ALT to find what needs attention, and export the report to CSV.
What Is Alt Text?
Alt text is a short description in an image’s alt attribute. Screen readers read it aloud to people who cannot see the image, browsers show it when the image fails to load, and search engines use it to understand the image.
<img src="sitemap-report.webp" alt="XML sitemap checker results showing 57 valid URLs and 2 duplicates">How to Use the Alt Text Checker
- Enter your homepage, for example
https://example.com. - Click Start Image ALT Audit.
- Review Missing ALT first, then Duplicate ALT.
- Update the alt text in the post editor or media library.
- Rerun the audit to confirm.
What the Results Mean
| Result | Meaning | Action |
|---|---|---|
| Good | Descriptive alt text is present | None |
| Missing ALT | The alt attribute is absent | Add a description, or alt="" if the image is purely decorative |
| Empty ALT | alt="" is set | Correct for decorative images; add text if the image carries information |
| Duplicate ALT | Many images share the same text | Describe each image individually |
| Errors | The page could not be fetched | Check the URL and server response |
How to Write Good Alt Text
- Describe what the image shows and why it is there, in one short sentence.
- Be specific: “Bar chart of ETL tool pricing models” is better than “chart”.
- Do not start with “image of” or “picture of”; screen readers already announce it as an image.
- Include a keyword only when it naturally describes the image. Never stuff keywords.
- For screenshots, mention the key information the reader should notice.
- Use empty alt text for decorative images such as dividers and background shapes.
Good alt text supports the WCAG accessibility guidelines and can help your images appear in Google Images.
Frequently Asked Questions
Does alt text help SEO?
It helps search engines understand images and can bring traffic from image search. Its main purpose, though, is accessibility.
How long should alt text be?
Usually one sentence. Some screen readers handle long alt text poorly, so put detailed explanations in the surrounding text or a caption.
Do featured images need alt text?
Yes, if they are shown on the page. Set it in the media library so it is reused wherever the image appears.
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