Base64 Encoder / Decoder

Online Base64 Encoder & Decoder

Our free Base64 encoder/decoder is a lightweight, blazing-fast developer utility. Base64 encoding is commonly used to encode binary data (like images or certificates) into an ASCII string format, allowing it to be safely transmitted over networks or embedded directly into HTML/CSS files as Data URIs.

Privacy First

Developers frequently deal with sensitive API keys, auth tokens, and environmental variables. You should never paste these into a tool that sends data to a server. Our utility processes everything locally in your browser using the native btoa() and atob() functions, guaranteeing your secrets remain safe.

Unicode Support

Unlike basic JavaScript implementations that fail on special characters, our tool includes full UTF-8 support, ensuring that emojis and international characters are encoded and decoded perfectly without throwing URI malformed errors.