Base64 Decoding and Encoding in JavaScript

Base64 decoding and encoding in JavaScript is handled through the atob() and btoa() functions respectively. The following script provides a few text boxes to play around with decoding and encoding strings in Base64. The code can be copied to a local text file and opened in a web browser for a simple encoder and decoder utility. I created this utility to provide a local solution to decode Base64 encoded data instead of using one of the available online solutions since I didn’t know whether or not the submitted data is captured on the server.

Leave a Comment