How Do I Encode and Decode Strings to Base64 in JavaScript?

Encode Strings to Base64 in JavaScript

In JavaScript, the encoding of strings to Base64 can be achieved using built-in functions.

To encode a string as Base64, JavaScript provides the btoa() function. This function takes a "string" as input but treats it as a byte array. Each character in the input string should represent an 8-bit byte.

For decoding Base64 strings, you can use the atob() function. It returns a "string" where each character represents an 8-bit byte, making it suitable for binary data handling.

It's important to note that Base64 encoding and decoding involve working with binary data. The btoa() function accepts binary data in the form of a string, while atob() returns a string representing binary data.

Additional Considerations:

• Some older browsers may not support btoa() and atob(). To check for compatibility, refer to resources like caniuse.com.

• For more information on binary data handling in JavaScript, consider referencing the following resource:

  • [Loading Binary Image Data using JavaScript and XMLHttpRequest](/questions/198145/how-do-i-load-binary-image-data-using-javascript-and-xmlhttprequest)

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