Why encode Base64 locally?
Base64 is a common format used to encode binary data or complex strings (like JSON Web Tokens, API Keys, or email attachments) into safe, printable ASCII text.
Because developers frequently deal with API secrets or sensitive user data that happens to be Base64-encoded, pasting those strings into a remote, cloud-hosted decoder is a massive security risk. This utility uses native browser functions (btoa() and atob()) to guarantee your data never leaves your current tab.