NOTE: This is for Google Chrome ONLY. Lighthouse is an open-source, automated tool for improving the quality of web pages. You can run it against any web page, public or requiring authentication. It has audits for performance, accessibility, progressive web apps, SEO and more.
Go to The Page You Want to Test
Right-click on the page
From the drop-down menu select "Inspect"
You will want to select "Lighthouse." You may need to select the double arrows in the top bar to find "Lighthouse."
- Select what you would like to test.
- Once you have them selected, select "Generate Report."
- It would be a best practice to select only "accessibility" and "best practices" and then run both the "mobile" and "desktop" device. For this purpose, we suggest running it twice.
- Once completed, it will give a percentage score out of 100.
- You can go through the testing site to find more information about what did not pass the automatic checker.
Note: you may see a warning at the top telling you that there were issues affecting this lighthouse run, even if you use an incognito window. This is ok, but please be aware of possible false positives.
Understanding the Results of Test
Issues Grouped by Type
Lists the issues that failed the automated checks. You can expand the accordion by selecting the Carat on the right to see more details, including the failing elements.
Items to Manually Check with Lighthouse
Lighthouse will provide you with a list of items to check manually. I am finding it lower on the results page.
Information on how to test them if you expand the carat on the right.
Passed Audits
- This section is for your reference about items that have passed! You do not have to do anything with this information.
- The information could be used to update roadmaps and others on progress.
Not Applicable
The number of automated checks that appear not to apply to the scan.
Runtime Settings
Runtime information could be helpful when vendors or others are trying to trouble shoot any issues.
Helpful Resources
The article will give you more information about the A11y Lighthouse.
More information about accessibility and barriers encountered.
To learn about data privacy.