HTML input maxlength Attribute

The maxlength attribute is used to define the maximum number of characters allowed in an input field. It helps restrict the length of user input.

• Limits the number of characters a user can enter.
• Commonly used with text-based input fields like text, password, and email.
• Helps in input validation and controlling data size.

Syntax:

<input maxlength="number">

• number: It contains a single value number which allows the maximum number of characters in <input> element. Its default value is 524288.

Examples of Using the maxlength Attribute

Here are some examples of using maxlength attribute:

Example 1: Limiting Username and Password Length

The maxlength attribute is used within <input> elements to restrict the length of text inputs for username and password fields.

Example 2: Limiting Email Address Length

Here, the maxlength attribute limits the length of an email input field to 30 characters.