Free WordPress diagnostic plugin
IndexLane Core Web Vitals Asset Snapshot
Take a quick, on-demand snapshot of the CSS, JavaScript, WordPress plugin/theme asset paths, and external asset domains present in selected page HTML before deciding what deserves deeper performance testing.
Runtime and privacy
Runs inside WordPress
Checks run on demand from an admin-only, nonce-protected screen. Off-site targets and off-site redirects are blocked. The plugin does not store scan results in the database, schedule jobs, add a frontend badge, or send telemetry to IndexLane.
Checks and output
What is included
- Fetches selected same-site URLs from a WordPress admin screen
- Lists CSS and JavaScript files found in the returned HTML
- Counts scripts and styles
- Identifies WordPress plugin and theme asset paths
- Lists external asset domains
- Flags obvious heavy third-party scripts for review
- Exports a CSV report for the current run
Known limits
What it does not do
- Calculate a Core Web Vitals score
- Run Lighthouse or PageSpeed Insights
- Infer ranking or conversion impact
- Generate critical CSS, compress images, or change site content
- Replace browser traces, field data, server logs, or a full crawl
The snapshot reports assets visible in returned page HTML. It is a triage aid, not proof that an individual asset caused an LCP, INP, CLS, or field-CWV failure.
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