Use the tools already in your browser
Browser developer tools can help explain why a page looks wrong or behaves unexpectedly. In Chrome DevTools, the Elements panel lets you inspect HTML and CSS. The Console shows logged messages, while the Network panel helps you inspect requests and responses.
Start with a concrete problem: a missing image, a button that does nothing or text that overflows. Check the relevant evidence before changing the code.
Make your checks repeatable
Keep a short list of the journeys that matter: opening navigation, visiting a service, viewing a project and validating an enquiry form. Run those checks after a change, alongside the project’s build and any relevant automated tests.
Preview different layouts
Device simulation is useful for checking breakpoints and narrow screens. It complements checking the site on the devices your visitors actually use. Look for clipped content, awkward spacing and controls that are difficult to reach.
A consistent routine is usually more helpful than collecting more tools.