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DevLab HTML, CSS and JavaScript Validators
Code Validators
Validate your HTML, CSS, and JavaScript code
HTML
CSS
JavaScript
<!DOCTYPE html> <html> <head> <title>Test</title> </head> <body> <h1>Hello World</h1> </body> </html>
Validate HTML
body { font-family: Arial, sans-serif; background-color: #f0f0f0; } h1 { color: blue; }
Validate CSS
function hello() { console.log('Hello World!'); } hello();
Validate JavaScript