How to Achieve a Perfect 100/100 Google Core Web Vitals Score
If your website isn’t loading fast or failing to respond quickly to clicks, you’re not just losing traffic, you’re losing business. In the digital world, where milliseconds make millions, Core Web Vitals are the silent gatekeepers of online success. And in 2025, they’re more crucial than ever.
For business owners and CEOs aiming for a lightning-fast, high-performing website, especially those looking to work with a top-rated Web Development Company, this blog is your Core Web Vitals 100/100 guide. Packed with expert-backed steps, real-world insights, and practical fixes, let’s uncover how you can Improve LCP, FID, CLS scores and why it matters more than ever.
What Are Core Web Vitals? (LCP, FID → INP, CLS)
Google’s Core Web Vitals are a set of user-centric performance metrics that directly impact your site’s search ranking and user experience. There are three main metrics:
- LCP (Largest Contentful Paint): Measures how fast the main content of a page loads. Ideal time: under 2.5 seconds.
- FID (First Input Delay): Was used to measure input responsiveness but has been replaced.
- INP (Interaction to Next Paint): The upgraded metric replacing FID in March 2024. It measures how quickly a page responds to all interactions throughout a session.
- CLS (Cumulative Layout Shift): Tracks how stable elements are as the page loads. No one likes a button that jumps.
Pro Tip: Unlike FID, INP looks at the worst-case experience, not just the first. This shift forces teams to think about performance throughout a user’s entire journey, not just the landing click.
How to check web core vitals?
To check your Core Web Vitals, you can use several tools provided by Google and others. Here are the most common and effective ones:
🔍 1. Google PageSpeed Insights
How to use: Enter your website URL, and it will analyze your site’s Core Web Vitals for both mobile and desktop.
Metrics shown:
Largest Contentful Paint (LCP)
First Input Delay (FID) / Interaction to Next Paint (INP)
Cumulative Layout Shift (CLS)
🧪 2. Google Search Console
How to use:
Go to the “Experience” section → “Core Web Vitals.”
Shows real user data (field data) from Chrome UX Report.
Best for: Monitoring performance over time and across multiple pages.
🛠️ 3. Lighthouse (Built into Chrome DevTools)
How to use:
Right-click on a page → Inspect → Go to “Lighthouse” tab → Run report.
Best for: In-depth technical audit and debugging.
📊 4. Chrome User Experience Report (CrUX)
Provides real-world user performance data.
Can be accessed via BigQuery (for advanced users) or through tools like PageSpeed Insights.
📱 5. Web Vitals Chrome Extension
How to use: Install from the Chrome Web Store.
See real-time Core Web Vitals for any page you visit.
Why a 100/100 Score Matters for SEO & UX in 2025
In 2025, Google’s algorithm is rewarding speed and stability like never before.
- Pages that load within 2.5 seconds see 24% higher engagement compared to slower ones.
- Google now factors INP over FID to ensure websites respond well throughout the entire session.
- Mobile Core Web Vitals tips have become critical as over 60% of search traffic now comes from mobile.
Put simply: higher scores = higher trust = better rankings and conversions.
And with Google PageSpeed Insights 100 becoming a gold standard among marketers and developers, that 100/100 score is no longer a brag; it’s a benchmark.
Core Web Vitals metrics set by Google for a “Good” score:
| Metric | Good | Needs Improvement | Poor |
| LCP | ≤ 2.5 s | 2.5 – 4.0 s | > 4.0 s |
| FID (deprecated) | ≤ 100 ms | 100 – 300 ms | > 300 ms |
| INP (current) | ≤ 200 ms | 200 – 500 ms | > 500 ms |
| CLS | ≤ 0.1 | 0.1 – 0.25 | > 0.25 |
Understanding the Three Core Metrics
A. Largest Contentful Paint (LCP)
LCP tracks the time taken to load the largest visible content on the screen. Usually, that’s a hero image or a primary headline. Anything over 2.5 seconds means your site needs improvement.
B. Interaction to Next Paint (INP)
This is the newer, more accurate version of FID. It measures how long it takes for the website to respond to any interaction, a click, a tap, or a keypress, and update the visual part of the page accordingly. The goal? Stay under 200 ms for a smooth experience.
Real-world case: An e-commerce brand improved its INP from 400ms to 150ms just by reducing heavy analytics scripts and optimizing third-party chat tools. As a result, their cart abandonment dropped by 18%.
C. Cumulative Layout Shift (CLS)
CLS measures visual stability. Ever clicked a button, and just before it registered, the content shifted and you clicked the wrong thing? That’s bad, CLS. It often comes from unoptimized images, ad elements, or font loading issues.
Step-by-Step Optimization for a Perfect 100/100 Score
A. Speed Optimization (LCP & INP)
- Compress & Optimize Images – Use next-gen formats like WebP or AVIF.
- Minimize JavaScript & CSS – One of the biggest culprits of delayed LCP. Use JavaScript & CSS optimization tools like PurifyCSS, Terser, or Tree Shaking.
- Enable Lazy Loading – Don’t load images outside the viewport unless necessary.
- Improve Server Response Time – Aim for Time To First Byte under 200 ms. Use CDNs, fast hosting, and caching. These are key server response time fixes.
B. Responsiveness (INP Improvements)
- Break Long Tasks – Anything above 50ms should be split to keep the main thread light.
- Use Web Workers – Offload heavy computations to prevent UI blocking.
- Minimize Main Thread Work – Run Lighthouse reports to identify blocking scripts.
- Hydrate Smartly – Use partial hydration or frameworks like Qwik or Astro for optimized interactivity.
Inside trick: Sites using progressive hydration are clocking INP times as low as 120ms on mobile devices, even with dynamic content.
C. Visual Stability (CLS Fixes)
- Always Set Image Dimensions – Prevents layout shifts by reserving space.
- Reserve Space for Ads & Embeds – Static containers avoid layout jumps.
- Use Fonts That Load Fast – Reduce FOIT/FOUT using font-display: swap.
Advanced 2025 Techniques for Peak Performance
Want to outperform competitors? These Web vitals optimization 2025 trends are setting new standards:
- Edge Rendering using tools like Cloudflare Workers to serve content from servers nearest to users.
- Islands Architecture in JavaScript frameworks (e.g., Astro) to minimize unnecessary JavaScript.
- Preload and Preconnect Strategies for critical assets like fonts and APIs.
- Real User Monitoring (RUM) vs Lab Data: Make decisions based on actual user behavior, not just synthetic tests.
Lesser-known trend: Top brands are moving to serverless functions and headless CMS to separate content delivery from rendering. This not only improves performance but also security.
Testing & Monitoring Your Score
Use multiple tools to test consistently and cross-check results:
- Google PageSpeed Insights for field + lab data.
- Lighthouse in Chrome DevTools for in-depth debugging.
- Web Vitals Chrome Extension for real-time monitoring.
- Search Console Core Web Vitals Report for tracking improvements at scale.
Bonus tip: Integrate Lighthouse into your CI/CD pipelines to test on every deployment, preventing regression before it hits production.
Step-by-Step Guide: Check Core Web Vitals in Google Search Console:
Step 1: Go to Google Search Console
Log in with your Google account.
Step 2: Select Your Website Property
From the left sidebar, choose the correct property (website) you want to analyze.
Step 3: Navigate to Core Web Vitals Report
On the left menu, click on “Experience” → then click “Core Web Vitals.”
Step 4: Choose Between Mobile and Desktop
You will see two tabs: Mobile and Desktop.
Click each one to see separate performance data.
Step 5: Review the Report
Google categorizes URLs as:
✅ Good
⚠️ Needs Improvement
❌ Poor
Metrics shown:
LCP (Largest Contentful Paint)
FID (First Input Delay) – or INP (Interaction to Next Paint)
CLS (Cumulative Layout Shift)
Step 6: Click “Open Report”
Click on each issue or metric to view:
Affected URL groups
Specific problem types
Suggestions to fix issues
Core Web Vitals Dashboard in Google Search Console:
Why Smart Businesses Partner with a Web Development Company in Ahmedabad
Getting a perfect 100/100 score isn’t a one-time job. It’s a continuous collaboration between developers, SEOs, and content teams. Many fast-scaling businesses are turning to expert Web Development Companies in Ahmedabad who specialize in these metrics and understand how to tweak real-world performance without breaking functionality or aesthetics.
They don’t just fix numbers. They build future-ready websites.
Fun fact: Sites built by performance-first agencies see 40% lower bounce rates on average and over 15% uplift in organic rankings within 3 months.
Final Thoughts: Is 100/100 Really Possible?
Yes, and it’s more achievable in 2025 than ever before. But perfection isn’t the point. Consistency, user delight, and technical health are.
Here’s your takeaway:
- Track metrics like INP, not just FID.
- Prioritize interactivity and stability along with speed.
- Apply real-user data to real-time fixes.
- Focus on fast-loading website SEO with deep attention to core vitals.
If you’re aiming to lead your category and win user trust, invest in Core Web Vitals. Whether you’re a Fortune 500 CMO or a growing brand, start by auditing your web vitals now. Partnering with a specialized Web Development Company in Ahmedabad might just be your smartest move of the year.
Get that perfect score. Not to impress Google, but to serve users better than anyone else and build a faster, more powerful web in the process.
You don’t need to calculate Core Web Vitals yourself — tools like Google PageSpeed Insights and Chrome DevTools do it for you. They measure how fast your website loads (LCP), how quickly it responds to clicks (INP), and whether things move around while loading (CLS). These tools test your website and give you scores along with tips on how to improve them, so you can make your site faster and more user-friendly.
Yes, Core Web Vitals do affect SEO. Google uses them as a ranking factor to help decide which websites provide a better user experience. If your site loads fast, responds quickly, and doesn’t shift around while loading, it’s more likely to rank higher in search results. While content and keywords are still very important, having good Core Web Vitals can give your site an extra boost in search visibility.
If you fail Core Web Vitals, it means your website is slow, unresponsive, or unstable, which can lead to a poor user experience. As a result, Google may rank your site lower in search results, especially if other sites offer better performance. Visitors may also leave your site quickly if it loads slowly or behaves poorly, which can hurt your traffic, conversions, and overall online success. Fixing Core Web Vitals helps improve both your SEO and how users interact with your site.
What started as a passion for marketing years ago turned into a purposeful journey of helping businesses communicate in a way that truly connects. I’m Heta Dave, the Founder & CEO of Eta Marketing Solution! With a sharp focus on strategy and human-first marketing, I closely work with brands to help them stand out of the crowd and create something that lasts, not just in visibility, but in impact!
