Paste a page’s HTML to check every image’s alt text and find the ones that are missing, empty or unhelpful.
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How to get your page’s HTML
- Open the page in your browser.
- Right-click and choose View page source (or press Ctrl+U, or Cmd+Option+U on a Mac).
- Select all, copy, and paste it into the box above.
What the checker flags
| Result | Meaning |
|---|---|
| Missing alt | No alt attribute at all: screen readers may read the file name |
| Empty alt (alt="") | Correct for decorative images, wrong for meaningful ones |
| File name as alt | Like IMG_2041.jpg: tells nobody anything |
| Over 125 characters | Too long to listen to; put details in the page text |
| “Image of…” | Redundant, because screen readers already say it’s an image |
How to write good alt text
- Describe what’s in the image and why it’s there, in a short sentence.
- Be specific: “Slim brown leather wallet with four card slots”, not “wallet”.
- Include a keyword only if it describes the image naturally.
- For images of text, include the text.
- For links and buttons that are images, describe where they go or what they do.
Frequently asked questions
What is alt text?
A short text description of an image, read by screen readers and shown if the image doesn’t load.
Does alt text help SEO?
Yes, Google uses alt text to understand images, which helps in Google Images.
Should every image have alt text?
Every image needs an alt attribute, but decorative images should have an empty one (alt="").
How long should alt text be?
Usually one short sentence, under about 125 characters.
Sources
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