Identify broken links (404s) and dead URLs on any page
Scan your website for dead links and 404 errors. Improve your search rankings and user experience by identifying broken paths instantly.
WebToolkit Pro is engineered for zero-trust environments. This utility processes your sensitive data entirely within your browser using Web Workers.
Operating server-side via a secure proxy, the engine fetches the HTML payload of your target URL. It utilizes DOM-parsing algorithms to extract every `<a>` (anchor) tag `href` attribute. It then executes asynchronous HTTP `HEAD` requests to every extracted URL simultaneously. It captures the response headers and categorizes the links into Success (200), Redirects (301/302), Client Errors (404/403), or Server Errors (500), displaying the results in a clean, filterable dashboard.
async function checkLink(url) {
try {
const response = await fetch(url, { method: 'HEAD', mode: 'no-cors' });
// no-cors obscures exact status, but network failures throw an error
return response.type === 'opaque' ? 'Likely Alive' : response.ok;
} catch (e) {
return 'Broken';
}
}Search engines like Google use 'spiders' to crawl websites by following links. If they encounter a 404 dead end, the crawl stops, and 'link equity' (ranking power) is wasted. Furthermore, a high volume of broken links indicates to Google that the site is abandoned, which can lower your overall domain authority.
A 301 is a 'Permanent Redirect'. It tells Google to transfer 100% of the SEO ranking power from the old link to the new link. A 302 is a 'Temporary Redirect', which tells Google to keep the old link indexed because the change is not permanent. Using 302s accidentally is a massive SEO mistake.
This specific tool is designed for deep, single-page audits (e.g., checking a specific massive blog post or a complex homepage). To crawl an entire domain (thousands of pages), you should use a dedicated desktop spider like Screaming Frog or Sitebulb.
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Explore All WebToolkit Pro ToolsThis utility is engineered and maintained under strict editorial and technical standards. All source calculations are audited against official formatting standards and RFC specifications to guarantee mathematical and logic accuracy.
Security Guarantee: To guarantee absolute user privacy, this tool executes 100% client-side inside your web browser. None of your input strings, payloads, keys, or files are ever transmitted to a server or stored externally.
Built by Abu Sufyan • Also explore: Severance Calculator & TradeConvert
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