SEO 工具
从页面的 HTML 检查其标题、描述、Open Graph 标签和关键词密度，并提供搜索结果预览。分析在本地运行。
使用方法
Paste a page's HTML — or fetch it from a URL — and press Analyze. Fourteen mechanical checks run locally: title and meta description length, H1 count, missing image alt attributes, Open Graph tags, canonical, JSON-LD and more, plus a search-result preview and, if you enter a keyword, its occurrence count and density. Enter the page URL as well so relative links can be counted as internal. All analysis runs in your browser.
注意事项
URL fetching uses the browser's fetch, so sites that do not allow cross-origin reads (CORS) cannot be fetched — paste the page source instead. The result is a checklist, not a ranking score: the length guidelines and thresholds follow common practice, not any search engine's official criteria, and passing every check does not guarantee any position.
常见问题
Why can't some URLs be fetched?
Because of the browser's CORS rules: unless the target site allows cross-origin reads with Access-Control-Allow-Origin, the browser will not hand the HTML to this page. This tool runs entirely in the browser and cannot bypass that.
What keyword density should I aim for?
There is no official ideal value. This tool reports the count and density as facts and does not recommend a target; unnatural stuffing can hurt rather than help.