How to Fix Largest Contentful Paint (LCP) for a Better Page Speed

Why Largest Contentful Paint (LCP) for a Better Page Speed Actually Matters

If your pages load slowly, users leave. It really is that simple. Largest Contentful Paint (LCP) for a better page speed is one of the three Core Web Vitals that Google uses as a ranking signal, and it measures how long it takes for the largest visible element on your page to fully render. That element is usually a hero image, a large heading, or a featured banner. According to Google (2023), a good LCP score is 2.5 seconds or less. Anything above 4 seconds is considered poor and can actively hurt both your rankings and your conversion rate.

The challenge is that LCP issues come from several different sources: slow servers, unoptimized images, render-blocking resources, and poor caching strategies, to name just a few. That means there is rarely one single fix. You need a layered approach.

This guide covers exactly 10 actionable ways to diagnose and fix your LCP problems so your site loads faster, ranks better, and converts more visitors into customers.

1. Identify Your Actual LCP Element First

Before you can fix anything, you need to know exactly which element Google is measuring as your LCP. Many site owners assume it is their logo or a background image, but it is usually the largest above-the-fold content element visible without scrolling. This is most often a hero image, a large H1 heading, or a featured video thumbnail.

Use Chrome DevTools by opening your page, pressing F12, navigating to the Performance tab, and running a recording. The LCP element will be highlighted in the summary. Google PageSpeed Insights and the Core Web Vitals report in Google Search Console both show field data for LCP as well. Web Vitals Chrome Extension is another fast option that flags the LCP element with a green border in real time.

Do not skip this step. Optimizing the wrong element wastes time and produces no measurable improvement. According to an HTTP Archive analysis (2023), images account for approximately 70% of LCP elements across the web, with the remaining split between text-based elements like headings and background images. Once you confirm your LCP element, every subsequent fix in this list becomes more targeted and effective. If you are running an e-commerce site, the product image on your category or product page is frequently the culprit. For content-heavy sites, a large featured image at the top of blog posts is the usual suspect.

2. Optimize and Compress Your LCP Image

If your LCP element is an image (which it is for most sites), optimizing that image is your highest-leverage action. Large, uncompressed images are the single biggest cause of poor LCP scores for the majority of websites.

Start by converting your images to modern formats. WebP delivers roughly 25 to 34% smaller file sizes compared to JPEG at equivalent visual quality, according to Google Developers (2022). AVIF goes even further, with file sizes up to 50% smaller than JPEG in many cases. Most modern browsers now support both formats, so there is little reason to serve PNG or uncompressed JPEG for your primary content images.

Use the HTML picture element to serve WebP with a JPEG fallback for older browsers. Set explicit width and height attributes on your image tags to prevent layout shift, which affects another Core Web Vital (CLS) alongside LCP. Run your images through tools like Squoosh, ImageOptim, or ShortPixel before uploading. For WordPress users, plugins like Imagify or ShortPixel can automate this on upload.

Also make sure you are serving the correctly sized image. Sending a 2400px wide image to a mobile device that displays it at 400px wide wastes bandwidth and slows LCP dramatically. Use responsive images with the srcset attribute to serve the right size for each device. This single change alone can cut your LCP image’s file size by 60 to 80% for mobile visitors.

3. Preload Your LCP Resource

Even after optimizing your image, the browser still needs to discover it before it can download it. By default, the browser parses HTML top-to-bottom and may not find your LCP image until it has already processed a significant portion of the page. A resource hint called preload solves this problem by telling the browser to fetch the LCP resource at the highest possible priority, as early as possible.

Add a link rel='preload' tag in the head of your HTML for your LCP image. For responsive images, use the imagesrcset and imagesizes attributes alongside the preload tag so the browser fetches the correct image size for the current viewport. This approach can reduce LCP by several hundred milliseconds on its own, and it compounds nicely with image compression.

If your LCP element is a web font that renders a large heading, preload the font file in the same way using link rel='preload' as='font'. Be careful not to preload too many resources at once. Preloading competes for bandwidth. Preload only your LCP resource and perhaps one critical font. Preloading five or six things simultaneously can actually worsen performance because it crowds out other necessary downloads. This is a trade-off worth acknowledging: preload is powerful but requires discipline to apply selectively.

4. Reduce Time to First Byte (TTFB)

LCP cannot start until the browser receives the first byte of the HTML document from your server. If your Time to First Byte (TTFB) is slow, your LCP will be slow regardless of how well you optimize everything else. Google recommends a TTFB of under 800ms, though under 200ms is considered excellent.

TTFB is influenced by your hosting infrastructure, server processing time, and network latency. Shared hosting plans frequently produce TTFB values of 800ms to 2 seconds or more. Upgrading to a managed VPS or dedicated server can bring TTFB down to under 200ms. Alternatively, a well-configured CDN caches your HTML at edge locations close to users, dramatically reducing latency without requiring a server upgrade.

On the application side, database query optimization, server-side caching (such as Redis or Memcached), and efficient backend code all reduce TTFB. For WordPress sites specifically, using a page caching plugin like WP Rocket or W3 Total Cache ensures that HTML is served from cache rather than generated fresh on every request. Our team at 1Solutions regularly audits TTFB as part of broader search engine optimization services because it is one of the most impactful yet overlooked factors in Core Web Vitals performance.

5. Use a Content Delivery Network (CDN)

A Content Delivery Network distributes your static assets (images, CSS, JavaScript, fonts) across servers located in multiple geographic regions. When a visitor loads your page, assets are delivered from the server physically closest to them, reducing the time data spends traveling across the network.

For LCP specifically, a CDN reduces the download time of your LCP image or other large resource. CDNs like Cloudflare, BunnyCDN, and Fastly also offer image optimization features, automatic WebP conversion, and HTTP/2 or HTTP/3 support, all of which contribute to faster load times. According to Cloudflare (2023), sites using their CDN see an average of 60% reduction in bandwidth and measurable improvements in page load speed.

CDNs are not free from trade-offs. They add a layer of complexity to cache invalidation: when you update a file, you need to ensure the CDN cache is purged so users receive the new version. Most managed CDNs handle this reasonably well, but it is something to factor into your deployment workflow. For e-commerce sites handling lots of product images and high traffic, a CDN is essentially non-negotiable for achieving a good LCP. If you are building or maintaining an online store, also check out our comparison of WooCommerce vs Shopify to understand how platform choice affects performance defaults.

6. Eliminate Render-Blocking Resources

Render-blocking resources are JavaScript and CSS files that the browser must fully download and process before it can display any content on the page. Every millisecond spent parsing a render-blocking file is a millisecond added to your LCP.

CSS is render-blocking by default because the browser needs styles before it can paint anything. The solution is to inline critical CSS (the styles needed to render above-the-fold content) directly in the head of your HTML, and defer the rest. Tools like Critical by Addy Osmani and PurgeCSS can help you identify and extract only the critical CSS your above-the-fold content requires.

For JavaScript, add the defer or async attribute to non-critical scripts. The defer attribute tells the browser to download the script in parallel with HTML parsing but execute it only after the HTML is fully parsed. This prevents JavaScript from blocking the rendering pipeline. Be careful with async on scripts that depend on each other, as execution order is not guaranteed. Audit your scripts using Chrome DevTools Coverage tab to identify JavaScript that is downloaded but not used on a given page and remove or split it. According to Web.dev (2023), eliminating render-blocking resources is one of the top three improvements contributing to better LCP scores across real-world sites.

7. Optimize Web Fonts to Prevent LCP Delay

Web fonts are a frequent but underappreciated cause of slow LCP scores, especially when the LCP element is a large text heading. Browsers block text rendering until a web font is downloaded, which can cause a phenomenon called Flash of Invisible Text (FOIT) or delay LCP if the font takes too long to arrive.

The most effective fix is to add font-display: swap to your @font-face declarations. This tells the browser to render text immediately using a system font fallback and swap in the web font once it loads. The LCP measurement captures the initial render, not the font swap, so this typically improves your LCP score while maintaining your brand typography.

Additionally, self-host your fonts rather than loading them from Google Fonts or other third-party font services. Third-party font requests add an extra DNS lookup, connection, and download step. Self-hosting removes the third-party dependency and allows you to preload the font file directly. Use only the font weights and styles you actually need. Loading a full font family with 10 weights when you only use Regular and Bold wastes 300 to 500KB of bandwidth. Subsetting fonts to include only the character sets your content uses (Latin only, for example) reduces file size further. Font optimization is a relatively low-effort fix with consistent, measurable LCP improvements.

8. Implement Effective Caching Strategies

Caching ensures that returning visitors (and sometimes even first-time visitors via CDN edge caches) receive page assets from a local or nearby cache rather than making a full round-trip to your origin server. Effective caching is fundamental to consistent LCP performance across a broad user base.

Set long cache-control headers (such as one year) for static assets like images, CSS, and JavaScript files that are versioned or fingerprinted by filename. For HTML documents, use shorter cache durations or server-side caching to balance freshness with performance. Browser caching helps returning visitors significantly, but it does nothing for first-time visitors. That is where CDN edge caching and server-side full-page caching (as discussed under TTFB) become critical.

For WordPress sites, page caching plugins handle most of this automatically. For custom-built sites, configure your web server (Nginx or Apache) to send appropriate cache-control headers. Also consider Service Workers for progressive web app (PWA) architectures, which can cache entire page shells and deliver near-instant LCP for repeat visits. The trade-off with aggressive caching is stale content: if you update your LCP image or hero banner, users may see the old version until the cache expires. Cache busting via filename versioning solves this cleanly. If you are managing a WordPress-powered website, combining a caching plugin with a CDN is the most practical and cost-effective route to strong LCP scores.

9. Audit and Limit Third-Party Scripts

Third-party scripts include analytics platforms, chat widgets, social media embeds, advertising tags, heatmap tools, and A/B testing libraries. Each one adds its own network request, processing time, and potential for render-blocking behavior. Collectively, third-party scripts are one of the most common causes of unexpectedly poor LCP scores even on otherwise well-optimized sites.

The first step is to audit everything. Use Chrome DevTools Network tab or a tool like Request Map Generator to visualize every third-party request your page makes. You may be surprised how many there are. Identify which ones are critical for the business (analytics, essential tracking) and which are optional or rarely used (old widgets, abandoned A/B tests, rarely viewed embeds).

For scripts that cannot be removed, defer their loading until after your LCP element has rendered. Use the defer attribute, load them on user interaction (such as on scroll or on click), or use a Facade pattern for heavy embeds like YouTube videos. A Facade replaces the embed with a lightweight placeholder image that loads the full embed only when a user interacts with it. This can save hundreds of kilobytes of JavaScript on initial load. According to a Web Almanac report (2023), the median page loads scripts from 8 distinct third-party hosts, and heavy third-party usage correlates strongly with poor Core Web Vitals scores. For a broader look at how content strategy intersects with page speed, our guide on boosting SEO with page content analysis covers how content decisions affect technical performance as well.

10. Monitor LCP Continuously with Real User Data

Fixing LCP once is not enough. Pages change, scripts get added, images get replaced, and hosting infrastructure fluctuates. LCP can regress after a seemingly unrelated site update. The only way to catch regressions before they hurt rankings is to monitor LCP continuously using real user data, not just occasional lab tests.

Google Search Console provides the Core Web Vitals report with field data segmented by page group, device type (mobile vs. desktop), and status (good, needs improvement, poor). Check this monthly at minimum. For more granular monitoring, implement a Real User Monitoring (RUM) solution. Options include Google’s web-vitals JavaScript library (free and open source), SpeedCurve, Calibre, or Datadog’s browser monitoring. These tools capture LCP from actual user sessions and can alert you when scores degrade past a defined threshold.

Set up alerts so you are notified if LCP for any key page type rises above 2.5 seconds. Pair this with regular PageSpeed Insights checks after any significant site update, plugin install, or content change. Document your LCP scores in a simple spreadsheet before and after each optimization so you can measure the actual impact of each fix and prioritize future work intelligently. Strong LCP scores also contribute directly to your broader organic search performance. Our professional SEO services include Core Web Vitals auditing as part of technical SEO reviews, which helps clients maintain strong scores over time rather than just achieving them once. You can also learn more about indexing factors that interact with page speed in our article on why Google may not be indexing your pages.

LCP Fix Comparison: Impact vs. Effort

Fix	LCP Impact	Implementation Effort	Best For
Compress and convert LCP image to WebP	High	Low	All sites
Preload LCP resource	High	Low	All sites
Reduce TTFB via server/caching	High	Medium	All sites
Implement CDN	High	Medium	High-traffic and e-commerce sites
Remove render-blocking resources	High	Medium to High	Sites with heavy CSS/JS
Optimize web fonts	Medium	Low	Sites with large heading as LCP
Implement caching strategy	Medium	Low to Medium	All sites
Audit and limit third-party scripts	Medium to High	Medium	Sites with many integrations
Continuous RUM monitoring	Prevents regression	Low (ongoing)	All sites
Identify correct LCP element	Foundational	Low	All sites (do this first)

Practical Action Plan: Where to Start

• Do This Now: Identify your LCP element using Chrome DevTools or PageSpeed Insights. Compress your LCP image and convert it to WebP. Add a preload tag for your LCP resource. These three actions require no infrastructure changes and can be done in under an hour with measurable results.
• Worth Doing: Audit and defer render-blocking JavaScript and CSS. Implement server-side page caching if you have not already. Set up a CDN for your static assets. Add font-display: swap to your font declarations. These steps require more planning but deliver consistent, compounding LCP improvements.
• Low Priority: Set up full Real User Monitoring with automated alerts. Implement Service Workers for PWA-style caching on repeat visits. Migrate entirely to a faster hosting infrastructure. These are valuable long-term investments but should come after the higher-impact fixes are in place and verified.

How LCP Connects to Broader SEO Performance

LCP is not an isolated technical metric. It sits within Google’s Core Web Vitals framework alongside Interaction to Next Paint (INP) and Cumulative Layout Shift (CLS), and all three feed into Google’s page experience signal. A strong LCP score contributes to better rankings, lower bounce rates, and higher engagement metrics, which in turn reinforce organic search performance.

If you are working on improving your overall search visibility alongside technical fixes, understanding how content quality interacts with page speed is important. Our article on SEO page content analysis explains this connection in depth. For e-commerce businesses in particular, where LCP improvements on product and category pages translate directly to conversion rate gains, combining technical optimization with strong e-commerce SEO strategies produces the most measurable business outcomes.

Page speed also increasingly matters in the context of AI-powered search. Faster, better-structured pages are easier for crawlers (including AI-driven ones) to process efficiently. For more on that evolving landscape, our piece on improving visibility in AI search engines covers what matters beyond traditional ranking signals.

Conclusion

Fixing Largest Contentful Paint (LCP) for a better page speed is one of the highest-return technical investments you can make for your website. It directly influences rankings, user experience, and conversion rates. The 10 fixes covered in this guide, from identifying your LCP element and compressing your images to eliminating render-blocking resources and implementing continuous monitoring, give you a complete, prioritized roadmap.

The most important thing is to start. Run PageSpeed Insights right now, identify your LCP element, and work through the list from highest impact to lowest. Most sites see meaningful LCP improvements within a few days of implementing just the first three or four fixes on this list. Combine them, monitor the results, and iterate. That is how you get from a poor LCP score to a consistently good one.

Frequently Asked Questions About Largest Contentful Paint (LCP)

What is a good LCP score?

Google defines a good LCP score as 2.5 seconds or under. Scores between 2.5 and 4 seconds need improvement, and anything above 4 seconds is classified as poor. Aim to keep LCP under 2.5 seconds for both mobile and desktop users.

What elements can be measured as the LCP?

The LCP element is the largest content element visible in the viewport without scrolling. This can be an image, a video poster image, a block-level text element (like a large heading or paragraph), or a background image loaded via CSS. Images account for roughly 70% of LCP elements across the web (HTTP Archive, 2023).

Does LCP affect Google rankings directly?

Yes. LCP is one of three Core Web Vitals that Google incorporates into its page experience ranking signal. While content relevance and authority remain the primary ranking factors, a poor LCP can act as a tiebreaker that pushes your page below a competitor with a similar content quality score but better performance metrics.

Why is my LCP worse on mobile than desktop?

Mobile devices typically have slower processors, less memory, and rely on mobile network connections rather than broadband. Mobile browsers also process JavaScript more slowly than desktop browsers. Additionally, if you are serving the same large image to mobile users that you serve to desktop users without responsive image sizing, the download time on mobile will be substantially higher. Use srcset and appropriately sized images to address this.

How often should I check my LCP scores?

Check LCP scores after any significant update to your site, including new plugin installs, theme changes, new third-party script additions, or major content changes. At a minimum, review your Core Web Vitals report in Google Search Console monthly. For high-traffic or e-commerce sites, consider implementing automated Real User Monitoring that alerts you to regressions in near-real time.