Analyze your website in seconds for FREE with Unlighthouse | Improve SEO and Performance

▶

Lighthouse is an essential tool that allows us to perform comprehensive audits of our website. By analyzing a page, we can obtain detailed metrics on critical aspects such as performance, speed, and SEO issues. Although the results should be taken with critical judgment, it is an invaluable aid that you can run with a single command.

1. Recommendations before starting

If you have a site with many similar pages (such as a template-based blog), it is not necessary to audit the entire site from the beginning. My recommendation is:

Analyze individual pages: If your blog has 1000 pages that share the same structure, analyze a single post to identify common issues.

Fix and then scale: Once you have applied the improvements to the base template, you can launch a full audit of the entire domain.

2. Useful terminal commands

To run Lighthouse, you need to have Node.js installed. This will allow you to use the npx command directly in your terminal (CMD, PowerShell, or Mac/Linux Terminal). Here are the most recommended parameters:

• --no-cache: Prevents caching to obtain real loading results.
• --url: Allows you to pass one or several specific URLs so as not to analyze the entire site unnecessarily.
• --export: Generates JSON and HTML files, which are essential for subsequent analysis with AI.

Pro tip: Create a specific folder for your project and run the command there. Lighthouse will create a hidden folder (starting with a dot) where it will save all the organized reports.

3. How to interpret and automate fixes

Once the execution is finished, you will have a folder with detailed reports. If viewing these files seems tedious or too technical, you can use Artificial Intelligence to automate improvements:

1. Locate the JSON file: Look for the report of the page that interests you (for example, a specific post page).
2. Use an AI (Gemini, Claude, etc.): Copy the content of the JSON file or upload it to your preferred AI tool.
3. Apply a simple Prompt: Ask the AI: "Analyze the following Lighthouse report file and suggest the necessary fixes to improve performance and SEO."

4. Practical results

This method has helped me implement technical improvements that we sometimes overlook, such as Preconnect. These tags tell the browser: "At some point, I will connect to this external server, go ahead and open the channel," which significantly speeds up the final loading.

Unlighthouse is a tool that requires almost no human interaction. You just run the command, pass the report to the AI, evaluate the suggestions, and apply the ones that make sense for your project.