Base64 Text Encoder
Encode any text string to Base64 format instantly. Perfect for encoding passwords, API tokens, configuration data, or any text that needs to be transmitted in Base64 format.
Base64 Output
Original Length: characters
Encoded Length: characters
Encoding: UTF-8
What is Base64 Text Encoding?
Base64 text encoding converts plain text strings into Base64 format, which represents text data using only ASCII characters. This is commonly used for transmitting text data through systems that only support ASCII, such as email protocols, URLs, or configuration files.
Common Use Cases
API Authentication: Many APIs require credentials to be Base64 encoded. For example, HTTP Basic Authentication encodes username:password combinations in Base64.
Data URLs: Embedding small text files or data directly in HTML, CSS, or JavaScript using data URLs with Base64 encoding.
Configuration Files: Storing sensitive configuration data or credentials in Base64 format for easy transmission and storage.
Email Attachments: MIME email protocols use Base64 encoding to transmit text attachments and ensure compatibility across different email systems.
How Text Base64 Encoding Works
This tool first converts your text to UTF-8 bytes, then encodes those bytes using the Base64 algorithm. Base64 uses 64 different ASCII characters (A-Z, a-z, 0-9, +, /) to represent binary data. Every 3 bytes of input become 4 characters of Base64 output, which is why Base64-encoded data is approximately 33% larger than the original.
Security and Privacy
Important: Base64 is an encoding method, not encryption. It provides no security or privacy. Anyone can decode Base64 text back to its original form. Never use Base64 encoding alone to protect sensitive information—always use proper encryption instead.
This tool runs entirely in your browser using JavaScript. Your text is never sent to any server, ensuring complete privacy for sensitive data like API keys or passwords.