图片替代文本审查工具

找出页面上所有缺少替代文本的图片。这对无障碍访问和SEO至关重要。

如何使用本工具

1
Paste the full URL of a public, server-rendered page into the input field.
2
Click Analyze to fetch the page on our server and parse its HTML.
3
Review the Total, Missing alt, and Empty alt counts at the top.
4
Scroll the per-image list (red = missing alt, yellow = empty alt) and copy the src values you need to fix.

替代文本为屏幕阅读器用户和搜索引擎描述图片。WCAG 2.1 AA要求内容图片具有有意义的替代文本，装饰性图片则使用空的alt=''。缺少替代文本是整个网络上排名第一的无障碍访问问题。本工具会标记出每一张没有替代文本的图片，以便你进行修正。

Auditing a marketing landing page before launch to confirm no hero or product <img> ships without an alt attribute.
Spot-checking a competitor's or client's live page to gauge how seriously they handle image accessibility.
Triaging an accessibility complaint by getting a fast list of images that screen readers would announce as unlabeled.
Reviewing a CMS template after a redesign to catch images where the author left the alt field blank.
Building an SEO punch list, since search engines use alt text to understand images and missing alts waste that signal.
Verifying that decorative images intentionally use alt="" rather than accidentally omitting the attribute entirely.

如果一张图片纯粹是装饰性的怎么办？▼

使用alt=''（空字符串）。这会告诉屏幕阅读器有意跳过它。

替代文本应该多长？▼

要有描述性但简洁，通常为5到15个词。不要堆砌关键词；这既损害SEO也损害无障碍访问。