Free Browser & DevTools lab: A browser with DevTools and practice websites, in your browser.

Open real demo websites in a browser with a full DevTools dock: inspect the live DOM in the Elements panel, read and evaluate JavaScript in the Console, watch fetch and XHR requests in the Network panel, and see localStorage, sessionStorage and cookies in the Application panel. Everything runs locally; no real network is touched.

Free, no login, nothing to install. Your work stays in this browser.

What you can do

• Inspect the live DOM tree and highlight elements on the page
• Read console output and evaluate JavaScript against the page
• Watch fetch and XHR requests, with headers and response bodies
• Explore localStorage, sessionStorage and cookies

Graded, AI-assisted versions live in web development courses and projects.