Validate a password using HTML and JavaScript Last Updated : 30 Sep, 2024 Comments Improve Suggest changes Like Article Like Report Validating a password using HTML and JavaScript involves ensuring that user-entered passwords meet certain criteria, such as length, complexity, or character types (e.g., uppercase, lowercase, numbers, and symbols). This process enhances security by enforcing strong password requirements before form submission.A password is correct if it contains: At least 1 uppercase character.At least 1 lowercase character.At least 1 digit.At least 1 special character.Minimum 8 characters. Approach :Retrieve Input Value: The test_str() function retrieves the value from the input field with id="t1" using document.getElementById().Check Password Criteria: Regular expressions are used to check for lowercase, uppercase, digits, special characters, and minimum length of 8 characters.Set Validation Result: If all conditions are met, the result is set to "TRUE"; otherwise, it is set to "FALSE".Display Output: The result is displayed in a readonly input field with id="t2", showing whether the password is valid or not.Example: In this example we are following above-explained approach. HTML <!DOCTYPE html> <html> <head> <title>validate password</title> <script type="text/javascript"> function test_str() { let res; let str = document.getElementById("t1").value; if (str.match(/[a-z]/g) && str.match( /[A-Z]/g) && str.match( /[0-9]/g) && str.match( /[^a-zA-Z\d]/g) && str.length >= 8) res = "TRUE"; else res = "FALSE"; document.getElementById("t2").value = res; } </script> </head> <body> <p> String: <input type="text" placeholder="abc" id="t1" /> <br /> <br /> <input type="button" value="Check" onclick="test_str()" /> <br /> <br /> Output: <input type="text" id="t2" readonly /> </p> </body> </html> Output:Validate a password using HTML and JavaScript Example Output Comment More infoAdvertise with us Next Article Validate a password using HTML and JavaScript A AnmolAgarwal Follow Improve Article Tags : HTML Similar Reads HTML Tutorial HTML stands for HyperText Markup Language. It is the standard language used to create and structure content on the web. 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