Category: Developer tools
Image Alt Text Auditor
List every <img> and flag missing or unhelpful alt text
Paste HTML to list every <img> tag and flag images missing an alt attribute, images with an empty alt (valid for decorative images) and alt text long enough to be worth shortening. Runs entirely in your browser.
| Source | Alt text |
|---|---|
/hero.jpg | Team collaborating around a laptop in a bright office (ok) |
/icon-search.svg | (empty (ok if decorative)) |
/banner.png | (missing alt attribute) |
/chart.png | Quarterly revenue chart showing steady growth from January through December, broken down by region and product line, with month-over-month percentage change annotations (consider shortening) |
Everything on this page is processed in your browser. Nothing is uploaded.
What this tool does
Alt text is how a screen reader, or a search engine, understands an image, but it is easy for a missing attribute or an overlong description to slip through a large page. This tool lists every <img> tag found in pasted HTML together with its alt text, flags any image with no alt attribute at all, notes images with an empty alt="" as fine when the image is decorative, and calls out alt text long enough that it is worth shortening to a clearer description.
How to use it
- Paste the HTML of a page or component into the input box.
- Review the list of images and the status shown next to each one's alt text.
- Add missing alt text, confirm empty alt attributes are intentional, and shorten anything overly long.
Privacy
This tool runs entirely in your browser. Your input is never uploaded, stored or shared — closing the tab removes it.
Frequently asked questions
- Is my HTML uploaded anywhere?
- No. The document is only ever read as text by a tokenizer in your browser tab; nothing is rendered, executed or sent to a server.
- Is alt="" always a mistake?
- No. An empty alt attribute is the correct, spec-recommended choice for purely decorative images, so this tool notes it rather than treating it as an error the way a missing attribute is treated.
- How long is too long for alt text?
- There is no hard limit, but very long alt text is a rough signal worth checking manually; this tool flags alt text over roughly 125 characters as worth reviewing for a shorter, clearer description.