Does this page make sense to someone who can't see it?
Automated checkers find the missing alt text. They can't tell you that “IMG_2034.jpg” or “click here” means nothing to a screen reader user; that has always been left to a person. Sense Check asks those questions of every image, link, heading and label on a page, and sends only the unclear ones to you.
What it asks
Images WCAG 1.1.1
Is the alt text a description, or a file name, a generic word, a keyword list, a copy of the caption? For a linked image, does it say where the link goes?
Links WCAG 2.4.4
Can someone tell where a link goes from its text and the sentence around it? Could the text mislead them about the destination?
Headings WCAG 2.4.6 · 1.3.1
Does each heading describe the section it introduces? Are levels skipped, or headings empty?
Form fields WCAG 3.3.2 · 4.1.2
Does every field have a label that says what to enter, and not only a placeholder?
How it decides
Rules settle what is certain: a missing alt attribute, a file name as alt text, a link with no name, an empty heading, a field labelled only by its placeholder, a page without a language. Jev (TypeSafe AI) makes the judgement calls, answering typed yes/no questions with a probability. At 70% or more the item is fine, at 30% or less it needs fixing, and anything in between is marked for a person to check.
It is a first pass, not an audit. It cannot see images, so it judges alt text from the text, the file name, the caption and the words around it. It reads the page as served, not what scripts add later, and it does not replace testing with a screen reader.