A temporary redirect where a permanent one belongs.
Found by Redirect checker →
The URL redirects back to itself and never settles.
Found by Redirect checker →
Page weight and speed checks
Response time, HTML size, compression, HTTP version, render-blocking and oversized assets, plus CrUX field data when you supply a key.
Page weight and speed checks
Asset weight
asset-weight-check reports render-blocking resources, oversized files, duplicate libraries, missing minification and caching.
Lab versus field
Crawl and browser timings are lab evidence; field Core Web Vitals come from crux-report, which needs a credential.
Three steps, one saved scan
Fetch the page and its assets
asset-weight-check downloads the page, then each linked stylesheet and script. It reads sizes, headers and markup. It does not render the page.
Measure the server and the HTML
A native crawl or a Screaming Frog export feeds the audit rules. They flag slow responses, heavy HTML and missing compression or HTTP/2.
Compare with real-user data
crux-report pulls field LCP, INP and CLS from the Chrome UX Report. It needs a Google Cloud API key that you supply.
Checks in this feature
| Check | What it means | Severity | Evidence |
|---|---|---|---|
SLOW_RESPONSE | The server takes too long to answer the request. | Important | Response time per URL |
LARGE_HTML | The HTML document is large for the page or for the site. | Important | HTML size in bytes |
HTML_OVER_2MB | The HTML document is larger than 2 MB. | Important | HTML size in bytes |
HTML_BLOAT | A lot of markup for very little text. | Tip | Bytes and word count per page |
NO_COMPRESSION | HTML is sent uncompressed when gzip or Brotli would help. | Tip | Content-Encoding header per URL |
HTTP1_ONLY | The page is served over HTTP/1.x, not HTTP/2 or newer. | Tip | HTTP version per URL |
One command
seohead asset-weight-check --url https://example.com/Install first: installation guide. Every command also runs as an MCP tool for AI agents.
From the check registry
SLOW_RESPONSELARGE_HTMLNO_COMPRESSIONHTTP1_ONLYHTML_BLOAT