How SnapSiteScan Works
Get instant insights into your website's performance, accessibility, SEO, and best practices. Our free tool analyzes your site and provides actionable recommendations to help you improve.
What We Analyze
Performance
Measures how fast your site loads and becomes interactive. Fast sites keep visitors engaged and rank better in search results.
- Loading speed and time to interactive
- Image optimization and compression
- JavaScript and CSS efficiency
Accessibility
Checks if your site can be used by everyone, including people with disabilities. Good accessibility also improves SEO and usability for all users.
- Color contrast and readability
- Keyboard navigation support
- Screen reader compatibility
SEO
Evaluates how well your site is optimized for search engines. Better SEO means more organic traffic from Google and other search engines.
- Meta titles and descriptions
- Heading structure and hierarchy
- Mobile-friendliness and crawlability
Best Practices
Checks for modern web development standards and security practices that keep your site safe and reliable.
- HTTPS security
- No deprecated APIs
- Console error-free
Understanding Your Scores
Each category is scored from 0-100. Here's what the colors mean:
Your site performs well in this area. Keep up the good work!
There's room for improvement. Check the recommendations.
Significant issues detected. Prioritize fixing these.
Core Web Vitals Explained
Core Web Vitals are specific metrics Google uses to measure user experience. They directly impact your search rankings. Read our complete Core Web Vitals guide →
Largest Contentful Paint (LCP)
Measures how long it takes for the main content of your page to load. This is usually the largest image or text block visible in the viewport.
First Contentful Paint (FCP)
The time it takes for the first piece of content to appear on screen. This gives users visual feedback that the page is loading.
Total Blocking Time (TBT)
The total time the page was blocked from responding to user input (clicks, taps, key presses). Lower is better for responsiveness.
Cumulative Layout Shift (CLS)
Measures visual stability—how much content moves around unexpectedly. High CLS causes frustrating accidental clicks.
Mobile vs Desktop Testing
We test your site on both mobile and desktop because they can have very different performance characteristics.
Mobile
Simulates a mid-tier mobile device on a 4G connection. This is the default view because:
- Over 60% of web traffic is mobile
- Google uses mobile-first indexing
- Shows worst-case performance
Desktop
Simulates a desktop computer with a fast internet connection. Useful for:
- B2B sites with mostly desktop users
- Web applications and dashboards
- Comparing mobile vs desktop experience
Understanding Your Report
Our reports are designed to be actionable and easy to understand. Here's what you'll find:
Executive Summary
At the top of your report, you'll see a quick summary highlighting:
- Your top 3 most critical issues to fix first
- Total estimated improvement if all issues are fixed
- Overall site health status at a glance
AI-Powered Analysis
NewOur AI analyzes your report and provides personalized recommendations:
- Explains WHY each issue affects user experience and SEO
- Prioritizes actions based on your specific situation
- Provides concrete, actionable recommendations
Scan History
NewTrack your progress over time with local history:
- See your last 20 scans
- Trend indicator shows if performance is improving or declining
- Stored locally in your browser - no login required
Prioritized Opportunities
Each issue is labeled with an impact level so you know where to focus your efforts:
Focus on high-impact issues first for the biggest performance gains with the least effort.
Your Site vs Average
See how your site compares to typical websites across the internet:
- Better than average — You're ahead of most sites
- Average — You're on par with typical sites
- Below average — Room for improvement
Page Composition
A visual breakdown of what makes up your page size:
- Images, JavaScript, CSS, fonts, and other resources
- Percentage breakdown to identify what's taking up the most space
- Tips when a particular resource type is unusually large
Quick Wins to Improve Your Score
These common fixes can significantly improve your performance with relatively little effort. See our complete optimization guide →
1. Optimize Images
Images are often the largest files on a page. Convert to WebP format, compress them, and use lazy loading for images below the fold. This alone can improve scores by 10-30 points.
2. Enable Text Compression
Enable gzip or Brotli compression on your server. This reduces the size of HTML, CSS, and JavaScript files by 60-80%. Most hosting providers have this as a simple toggle.
3. Remove Unused Code
Audit your CSS and JavaScript for unused code. Tools like PurgeCSS can automatically remove styles you don't need. Consider if all your third-party scripts are truly necessary.
4. Use a CDN
A Content Delivery Network serves your files from locations closer to your users. Services like Cloudflare offer free tiers and can dramatically improve load times for global visitors.
5. Preload Critical Resources
Use <link rel="preload"> for fonts, hero images, and critical CSS. This tells the browser to fetch important resources early, reducing perceived load time.
Frequently Asked Questions
Is SnapSiteScan free?
Yes, completely free! We believe everyone should have access to performance insights to build a faster web.
How accurate are the results?
Our reports are powered by Google's Lighthouse analysis — the same open-source engine available in Chrome DevTools. Results may vary slightly between scans due to network conditions and server response times. Learn more about speed test accuracy →
Why is my mobile score lower than desktop?
Mobile tests simulate a slower device and network connection. It's normal for mobile scores to be 20-40 points lower. Focus on optimizing for mobile since that's what Google prioritizes.
How often should I test my site?
Test after every significant change to your site. Regular monitoring (weekly or monthly) helps catch performance regressions early.
What's a good score to aim for?
Aim for 90+ in all categories. However, even a score of 50-89 is acceptable for most sites. Focus on improving opportunities that have the biggest potential savings.
Can I test multiple websites at once?
Yes! Our Bulk Scanner lets you test up to 5 websites simultaneously—perfect for agencies and developers managing multiple sites.