SEO June 10, 2023

Step-by-Step Guide to Using Google Lighthouse Tool for Auditing your website

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Ah, the humble website audit - the process of scrutinizing your site's inner workings, identifying areas for improvement, and making tweaks to maximize performance. It's a task that can strike fear into the heart of even the most seasoned SEO expert.

But fear not, dear reader - today we're going to delve into the wonderful world of Google Lighthouse, the ultimate tool for auditing your website's performance. Developed by the search engine giant themselves, Lighthouse provides an in-depth analysis of your site's speed, accessibility, best practices, and SEO, giving you invaluable insights into how to optimize your online presence.

But what sets Lighthouse apart from other website auditing tools, I hear you ask? Well, for starters, it's completely free. That's right - no need to shell out your hard-earned cash for expensive software or consultancy fees. And with its user-friendly interface and comprehensive reporting, even those new to website auditing can get to grips with Lighthouse in no time. So, whether you're a seasoned SEO pro or a website owner looking to boost your online performance, join me as we take a deep dive into the world of Google Lighthouse and discover the power of this essential tool.

Understanding Google Lighthouse Tool

Google Lighthouse is a free, open-source tool developed by Google to help web developers and site owners improve the quality and performance of their websites. Lighthouse conducts an audit of your site's speed, accessibility, best practices, and SEO, and generates a comprehensive report with suggestions on how to improve each area. The tool can be run in any modern web browser and is widely used by web developers, SEO experts, and website owners to enhance the user experience and boost website rankings. With its user-friendly interface and in-depth reporting, Lighthouse is a powerful tool that can help you optimize your website and stay ahead of the competition.

Let's dive into the different metrics measured by Google Lighthouse and what they entail.

Performance: This metric measures how quickly your website loads and how responsive it is to user interactions. Google Lighthouse analyses factors such as the size and complexity of your website, as well as the efficiency of its coding, to provide a score for performance. A high score for performance means your website loads quickly, and users can interact with it without experiencing any lag.

Accessibility: Accessibility is all about making your website usable for as many people as possible, including those with disabilities. Lighthouse measures how well your website adheres to accessibility guidelines such as the Web Content Accessibility Guidelines (WCAG). It analyzes factors such as the use of appropriate text size, contrast, and color, as well as the inclusion of alt text for images and proper markup for headings. A high score for accessibility means your website can be accessed and used by everyone, regardless of any disabilities they may have.

Best Practices: This metric measures how well your website adheres to best practices for web development and design. Lighthouse checks factors such as the use of secure HTTPS connections, appropriate use of HTML tags, and the inclusion of descriptive and meaningful meta tags. A high score for best practices means your website follows established standards for web development, making it easier to maintain and less prone to errors.

SEO: This metric measures how well your website is optimized for search engines, such as Google. Lighthouse analyzes factors such as the use of appropriate page titles, meta descriptions, and structured data. It also checks for the presence of a sitemap and how well your website is linked internally and externally. A high score for SEO means your website is more likely to rank well in search engine results pages, making it easier for users to find.

Steps for Using Google Lighthouse Tool

here's a more detailed step-by-step guide on how to use the Google Lighthouse tool:

Step 1: Access the Google Lighthouse tool

The first step is to access the Google Lighthouse tool. You can do this by opening your Google Chrome browser and clicking on the three vertical dots in the top-right corner of the screen. From the drop-down menu, select "More tools" and then "Developer tools". Alternatively, you can use the shortcut keys "Ctrl + Shift + I" on Windows or "Cmd + Option + I" on Mac to open the developer tools. Once the developer tools are open, click on the "Lighthouse" tab.

Step 2: Enter your website's URL

Next, enter your website's URL in the text box provided. You can also choose to select the checkbox for "Mobile" or "Desktop" to specify the type of device you want to test for.

Step 3: Choose the device type for testing

Before running the audit, you can choose to simulate the testing environment by selecting the device type from the dropdown list provided. This can help you understand how your website performs on different devices.

Step 4: Run the audit

Click on the "Generate report" button to run the audit. Lighthouse will now run a series of tests on your website based on the metrics we discussed earlier - performance, accessibility, best practices, and SEO. The audit may take several seconds to complete, depending on the size and complexity of your website.

Step 5: Review the results and identify areas for improvement

Once the audit is complete, Lighthouse will generate a detailed report with scores for each metric and suggestions on how to improve them. You can review the report and identify areas where your website can be optimized for better performance, accessibility, best practices, and SEO. You can also choose to export the report as a PDF or JSON file for future reference.

Steps for Using Google Lighthouse Tool

After running your website through the Lighthouse tool, you may notice that your website's performance score is lower than you would like it to be. Don't panic! There are plenty of tips and tricks to improve your website's performance and boost your score. Here are some best practices to consider:

Step 1: Optimize Images

Images can take up a lot of space on your website, which can lead to slower loading times. To improve your website's performance, you can optimize your images by compressing them without losing too much quality. You can also use lazy loading to ensure that images are only loaded when they are needed, rather than all at once.

Step 2: Minimize Code

Minimizing your website's code can also help improve performance. This can be done by minifying CSS, HTML, and JavaScript files. You can also remove any unnecessary code or plugins that are not being used on your website.

Step 3: Leverage Browser Caching

Browser caching can also help improve your website's performance by storing frequently used resources, such as images and JavaScript files, in the browser cache. This means that the next time a user visits your website, the resources can be loaded from the cache rather than being downloaded from the server again.

Step 4: Use a Content Delivery Network (CDN)

A content delivery network can help improve your website's performance by distributing your website's content across multiple servers. This can reduce the load on your server and improve loading times for users.

Step 5: Regularly Monitor and Optimize

It's important to regularly monitor your website's performance and make any necessary optimizations. This can be done by regularly running Lighthouse audits and addressing any issues that are identified. You can also use tools like Google PageSpeed Insights to get additional suggestions on how to improve your website's performance.

By following these best practices and regularly monitoring and optimizing your website's performance, you can improve your Lighthouse score and provide a better user experience for your visitors.


Using the Google Lighthouse tool to audit your website is a great way to identify areas for improvement and optimize your website's performance, accessibility, best practices, and SEO.

By following the step-by-step guide outlined in this post, you can run a Lighthouse audit and improve your website's performance by optimizing images, minimizing code, leveraging browser caching, using a content delivery network, and regularly monitoring and optimizing your website.

Optimizing your website is an ongoing process, and it's important to regularly audit your website and make necessary improvements.

For additional information and resources on website optimization, check out these external links:

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