HTML SEO Checker
Paste a page's HTML source and check title length, meta description, canonical tag, H1 count, favicon, robots noindex, viewport and image alt coverage.
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A Quick SEO Pass Over Raw HTML
Paste HTML source (view-source, a saved file, or a fetched page) and the tool checks the on-page SEO basics: title tag presence and length, meta description presence and length, canonical link, H1 count (exactly one is ideal), favicon link, a robots noindex warning if present, viewport meta, the lang attribute, and how many <img> tags are missing alt text.
It parses with the browser's own HTML engine rather than regex, so it handles real-world markup correctly. Nothing is fetched — you provide the HTML.
Frequently Asked Questions
Does this fetch my live page, or do I paste the HTML?
You paste it — view-source output, a saved .html file's content, or HTML copied from your CMS. The tool never fetches a URL on its own.
What title and description lengths are considered ideal?
Roughly 50-60 characters for the title and 120-160 for the description — close to what Google typically displays before truncating. For a pixel-accurate truncation preview, use this site's Google Search Result Preview tool.
Why does a robots noindex tag get flagged?
A noindex directive tells search engines not to index the page at all — often left in by mistake after a staging deploy. It's flagged as a warning so you notice it before publishing.
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HTML SEO Checker