Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text
What is Base64?
Base64 is an encoding scheme that converts binary data into a string of printable ASCII characters. Every three bytes are encoded into four characters from the alphabet A-Z, a-z, 0-9, + and /. Base64 is frequently used to safely transmit binary data in text formats like emails (MIME), JSON, or XML. Data URIs in HTML and CSS also use Base64-encoded images or fonts. Understanding Base64 is essential for web developers working with APIs, authentication tokens, and embedded resources.
How do I use the Base64 Encoder?
Select the desired mode above: "Encode" converts your text into a Base64 string, "Decode" does the reverse. Enable the "URL-safe" option if the Base64 string will be used in a URL - this replaces the characters + and / with - and _. You can copy the result with a single click. The tool handles special characters and Unicode text correctly.
Why use Base64 online?
Our Base64 Encoder runs entirely in your browser - your data is never sent to a server. This is especially important for sensitive information like API keys or tokens. You do not need to install any software and can get started immediately. The encoder correctly handles umlauts and special characters, making it suitable for international text encoding without any compatibility issues.
More Tools
Also try our JSON Formatter for API responses, the URL Encoder for URL parameters, or the JWT Decoder for token analysis.