LCP
Largest Contentful Paint
5.5s
Poor
Good: < 2.5s
Measures how long it takes for the main content to appear on screen
Remove Unused JavaScript Aggressively
How to optimize synthesia.io
Remove Unused JavaScript Aggressively
High Impact+18 points estimated
Why It Matters
924KB of unused JavaScript is blocking rendering and delaying LCP by 400ms, with reCAPTCHA being the worst offender.
How to Fix
Remove duplicate reCAPTCHA scripts that appear three times in your code. In Webflow, audit your Custom Code sections and third-party integrations. Defer non-critical scripts like tracking pixels and A/B testing tools until after page load using async/defer attributes.
0Poor
What This Score Means
A score of 39 falls in the "Poor" range (50-89). While it is better than poor (0-49), you should aim for 90+ to provide an optimal user experience and maximize SEO benefits.
This site is slower than approximately 35% of similar sites. The main issues affecting performance are image optimization, JavaScript execution time, and layout stability.
Addressing these issues could improve your conversion rate by 15-20% and boost your search engine rankings.
Core Web Vitals Analysis
INP
Interaction to Next Paint
243ms
Needs Improvement
Good: < 200ms
Measures how quickly the page responds to user interactions
CLS
Cumulative Layout Shift
0.11
Needs Improvement
Good: < 0.1
Measures visual stability - how much content shifts during page load
AI Performance Analysis
This Webflow site has poor performance with a score of 39/100. The biggest problem is multiple page redirects that are adding 780ms of unnecessary delay before the page even starts loading, significantly hurting both First Contentful Paint and Largest Contentful Paint times. Additionally, the site is loading nearly 1MB of unused JavaScript (particularly from reCAPTCHA) and has render-blocking CSS files that are preventing fast page display. Fixing the redirect chain and reducing unused JavaScript could save over 1.7 seconds in load time and dramatically improve the user experience.
Other Optimization Recommendations
Eliminate Redirect Chain Immediately
High Impact+15 points estimatedWhy It Matters:
The redirect from synthesia.io to www.synthesia.io wastes 780ms and delays both LCP and FCP by 800ms.
How to Fix:
Update your domain configuration to serve content directly from www.synthesia.io without redirecting. In Webflow, ensure your primary domain is set correctly in Project Settings > Hosting. Update all internal links and canonical URLs to use the www version consistently.
Fix Layout Shifts from Body Element
Medium Impact+8 points estimatedWhy It Matters:
A major layout shift (0.087 score) from the body element is causing your poor CLS score of 0.111.
How to Fix:
The body.top-banner-visible class is causing content to jump during load. In Webflow, ensure your top banner has a fixed height set in CSS rather than expanding dynamically. Add min-height properties to containers and reserve space for any dynamically loaded content in the hero section.
Keep Your Site Fast After Optimization
Once your site is optimized, maintain that speed. Use DeployHQ for zero-downtime, automated deployments—so performance fixes and updates go live safely every time, without breaking your site.
Explore DeployHQ →Trusted by engineering teams shipping high-performance sites
Want to Analyze YOUR Website?
Get AI-powered performance insights with actionable fixes in 30 seconds
Related Performance Analyses
More Webflow Speed Tests
Webflow Performance Resources
Implement Efficient Cache Headers
Poor caching wastes 398 KiB on repeat visits and delays LCP by 2.6 seconds.
Optimize Image Delivery Performance
Oversized images waste 301 KiB and delay LCP by 50ms with poor responsive sizing.
Remove Unused JavaScript Code
924 KiB of unused JavaScript is delaying LCP by 2.5 seconds and blocking user interactions.
Fix Layout Shifts from Body Element
A major layout shift (0.087 score) from the body element is causing your poor CLS score of 0.111.