Alt Text Checker
Check your images for missing, empty, or generic alt text that hurts accessibility and SEO.
Runs entirely in your browser — your files are never uploaded to a server.
How It Works
1. Choose Your File
Drag & drop or select the file you want to work with.
2. Processed in Your Browser
Everything happens locally on your device — your file is never uploaded anywhere.
3. Download Your Result
Get your finished file instantly, ready to save or share.
Frequently Asked Questions
Is empty alt text always wrong?
No — empty alt="" is correct for purely decorative images that don't convey meaningful content. This tool flags them for you to double-check, not as an automatic error.
What counts as "generic" alt text?
Text that looks like a filename (e.g. "IMG_1234.jpg") or a placeholder word like "image" or "photo" — these don't actually describe what's in the picture.
Why does alt text matter for SEO?
Search engines can't see images, so alt text is one of the only ways they understand what an image shows and depicts — it also helps the image appear in image search results.
Does this check images that are already live on my site?
No — paste the HTML you want to check; nothing is fetched from a live URL.