What Are DevTools?
DevTools are built-in tools in browsers like Chrome and Firefox that allow developers to:
- Analyze page load performance
- Inspect loaded resources like CSS and JS
- Monitor memory and resource usage
- Track errors and logs in the Console
How to Analyze Performance with DevTools
- Open your site in Google Chrome.
- Press F12 or right-click → “Inspect”.
- Go to the Performance tab and record a session.
- Analyze the results:
- Rendering time
- Image and asset loading
- JavaScript execution time
- Time to Interactive (TTI)
Other Useful Panels
- Lighthouse: Full reports on speed, usability, and improvements.
- Network: Tracks requests and file sizes.
- Coverage: Shows unused CSS/JS code.
Conclusion
DevTools offer powerful insights to spot and fix performance issues.
Start recording and analyzing sessions to fine-tune your site experience.