Free Website Audit & Lighthouse Analysis

What is a Website Audit?

A website audit is a complete health check for your web presence. Modern websites are complex distributed applications combining HTML markup, responsive CSS, JavaScript bundles, third-party analytics trackers, edge CDN networks, and database backends. Over time, code changes, plugin additions, uncompressed media, and hosting reconfigurations can introduce regressions that degrade site speed, break search indexing, or alienate users with disabilities.

By performing regular audits with Uzvera, engineering and marketing teams can uncover bottlenecks before they harm organic traffic or sales. For complementary network-level diagnostics, you can also run our Website Status & Uptime Checker, verify encryption with our SSL Certificate Checker, and test bandwidth with our Internet Speed Test.

What is a Lighthouse Audit?

Google Lighthouse is the gold standard open-source framework for auditing web applications. When an audit is triggered on Uzvera, our queue dispatches a clean, headless Chromium browser instance in an isolated container. The browser navigates to the target page, executes scripts, records rendering frames, logs console warnings, and executes hundreds of automated assertions across four core pillars:

• Performance: Evaluates page loading milestones, rendering phases, asset delivery efficiency, and Core Web Vitals metrics under realistic network and CPU conditions.
• Search Engine Optimization (SEO): Validates that search engine spiders (Googlebot, Bingbot) can parse page titles, meta descriptions, canonical URLs, robots.txt directives, and mobile viewport configurations.
• Accessibility (a11y): Scans the DOM tree for color contrast compliance (WCAG 2.1), descriptive alternative text on images, keyboard focus traps, form field labeling, and ARIA roles.
• Best Practices: Ensures the site uses HTTPS, avoids deprecated web APIs, safeguards against cross-origin vulnerabilities, and maintains correct image aspect ratios without layout shift.

What is a Good Website Performance Score?

Lighthouse computes each category score on a 0 to 100 logarithmic distribution based on empirical data from millions of web pages:

What are Core Web Vitals?

Google Core Web Vitals represent user-centric performance milestones that measure the tangible human experience of loading and interacting with a web page:

• First Contentful Paint (FCP): Marks the point in time when the browser renders the first piece of DOM content (text, image, or non-white canvas). A fast FCP reassures the user that the site is actively loading. Target: ≤ 1.8s.
• Largest Contentful Paint (LCP): Measures when the main content block (hero image, banner, or main headline) is fully rendered in the viewport. Target: ≤ 2.5s.
• Total Blocking Time (TBT): Measures the total duration between FCP and Time to Interactive where the browser's main thread was blocked by tasks exceeding 50ms, preventing responsiveness to mouse clicks, taps, or keyboard presses. Target: ≤ 200ms.
• Cumulative Layout Shift (CLS): Measures the sum total of all unexpected layout shifts that occur during the entire lifespan of the page (e.g. ads or images loading without reserved dimensions, causing text to jump). Target: ≤ 0.1.
• Speed Index (SI): Measures how quickly contents are visually populated during page load. Target: ≤ 3.4s.

How Website Speed Affects Users and SEO

Speed is no longer merely a technical convenience; it is a direct driver of business revenue and search visibility:

1. Google Search Ranking Signal: Google officially incorporates Page Experience and Core Web Vitals into desktop and mobile search ranking algorithms. Slow pages risk losing search visibility to faster competitors.
2. Conversion Rate Multipliers: Industry research across major ecommerce platforms demonstrates that every 100ms improvement in site load speed can lift retail conversion rates by up to 8%.
3. Lower Bounce Rates: When mobile pages take longer than 3 seconds to load, bounce rates spike dramatically. Users abandon the checkout funnel or bounce back to search results, sending negative engagement signals to search engines.
4. Crawl Budget Efficiency: When web servers respond quickly, search engine bots can crawl more URLs within their allocated crawl budget, ensuring newly published articles and product pages are indexed without delays.

Common Technical SEO Problems and How to Fix Them

Our audit inspects dozens of subtle SEO misconfigurations that frequently impair search rankings:

• Missing or Duplicate Title Tags: Every page must possess a unique, descriptive <title> element between 40 and 60 characters that conveys the primary topic.
• Missing Meta Descriptions: A concise 120–160 character meta description improves click-through rate (CTR) in search results.
• Improper Canonical URLs: Without self-referential or parameter-stripped<link rel="canonical"> tags, search engines may split link equity across tracking URLs, HTTP/HTTPS variants, or trailing slash paths.
• Uncrawlable Links: Links coded as <a onclick="..."> instead of standard <a href="/path"> prevent search spiders from discovering and indexing your internal pages.
• Missing or Malformed Robots.txt & Sitemap: A broken robots.txt file can accidentally disallow key sections of your website, while a missing XML sitemap prevents rapid discovery of new content. For DNS-level checks, test with our DNS Toolbox.
• Network Routing Latency: If TTFB remains sluggish despite frontend optimizations, inspect intermediate transit routing using our Traceroute Tool.

How to Improve Website Accessibility (WCAG Compliance)

Web accessibility ensures that all users—including individuals with visual, auditory, motor, or cognitive disabilities—can effectively navigate and interact with your digital products. Following the Web Content Accessibility Guidelines (WCAG 2.1 AA) also expands your potential customer audience and mitigates legal compliance risks:

• Provide Descriptive Alt Text: Every meaningful <img> must have analt attribute explaining what the image depicts. Purely decorative graphics should use an empty alt="" or aria-hidden="true".
• Maintain Strict Contrast Ratios: Text and interactive icons must maintain a minimum contrast ratio of 4.5:1 against their background (3:1 for large text) so users with low vision or reading in bright sunlight can easily read your content.
• Ensure Explicit Form Labels: Every <input>, <select>, and <textarea> requires an associated <label> element oraria-label attribute to announce its purpose to screen readers.
• Preserve Semantic Heading Hierarchy: Maintain a sequential heading structure (<h1> → <h2> → <h3>) without skipping levels so assistive technology users can skim and navigate your page structure logically.
• Keyboard Operability: Ensure all interactive buttons, menus, and modal dialogs can be focused and activated using only the Tab, Enter, Space, and Escape keys, with visible focus indicators at all times.