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Core Web Vitals Guide
Optimize Largest Contentful Paint, First Input Delay, and Cumulative Layout Shift.
Core Web Vitals are Google’s performance metrics for user experience. NakedURL gives you TTFB, page size, and a performance grade (A‑D) to help you diagnose issues.
3
Core metrics
1
Performance grade
30s
Audit duration
100%
Free always
Key Findings
1. What Are Core Web Vitals?
Core Web Vitals are a set of user‑centric metrics: LCP (Largest Contentful Paint) – loading performance (under 2.5s); FID (First Input Delay) – interactivity (under 100ms); CLS (Cumulative Layout Shift) – visual stability (under 0.1).
2. How NakedURL Helps
We measure TTFB (Time To First Byte) and page size as proxies for LCP. We also check lazy loading and performance grade. Use these indicators to prioritize improvements.
3. Actionable Steps to Improve
Reduce server response time (TTFB) with caching and faster hosting. Optimize images and use modern formats. Eliminate render‑blocking resources. Implement lazy loading for off‑screen content.
- Use a CDN to reduce latency
- Enable Gzip/Brotli compression
- Optimize CSS and JavaScript delivery
- Add preconnect for third‑party origins
⚠️ The Problem
Poor Core Web Vitals hurt your rankings and user experience
- Slow LCP – users wait too long for main content
- High FID – unresponsive interactions
- Layout shifts – frustrating and confusing
- No performance monitoring – unaware of issues
✅ NakedURL Solution
NakedURL gives you a quick performance health check
- Measure TTFB and page size
- Get a clear performance grade (A‑D)
- Identify missing lazy loading
- Recommend specific optimizations
Key Features
TTFB check
Measure server response time in milliseconds.
Page size
Know the total size of your HTML and assets.
Lazy loading scan
Check if you’re deferring off‑screen images.
Performance grade
A clear letter grade to show your standing.
My TTFB is 800ms – how can I reduce it?
Consider hosting and caching. A TTFB over 500ms is slow. Move to a faster host, enable server‑side caching, and use a CDN. NakedURL will show you your current TTFB and track improvements after changes.
Frequently Asked Questions
What is NakedURL and how does it work?
NakedURL is a free SEO and GEO audit tool that checks 60+ metrics on any website. It analyses meta tags, readability, backlinks, structured data, AI readiness, and more – all in under 30 seconds.
Is NakedURL really free?
Yes. NakedURL is completely free with no sign‑up or credit card required. You get full access to all 60+ checks and insights.
How can I use AI to improve my SEO?
Run an audit, then copy the recommendations and paste them into your preferred LLM (ChatGPT, Claude, etc.) with a prompt asking for specific code or content changes for your framework.
How long does the audit take?
Most audits complete in 10‑30 seconds. The time depends on your server speed and the complexity of your site.
Do I need to create an account?
No. NakedURL requires no registration. Just enter a URL and get your report instantly.
What is GEO and why does it matter?
GEO (Generative Engine Optimization) optimises your content for AI search engines like ChatGPT and Perplexity. It involves llms.txt, question headings, FAQ schema, and allowing AI bots.