Base64 Encoder — Encode Text to Base64
Convert any text string to Base64 encoding instantly. Perfect for data URIs, API authentication, and embedding binary data in text formats.
How to Encode Text to Base64
Enter Your Text
Type or paste the text string you want to encode into the input field. This can be any text: passwords, tokens, JSON, or plain text.
Click Encode
Press the Encode to Base64 button. The text is converted using the standard btoa() method that maps binary data to the Base64 character set.
Copy the Result
The Base64-encoded string appears in the output field. Copy it for use in data URLs, HTTP headers, or configuration files.
Understanding Base64 Encoding
Base64 encoding takes binary data and converts it into a text representation using 64 printable characters: A-Z, a-z, 0-9, +, and /. The encoding process groups 3 bytes of input into 4 Base64 characters, padding with = signs when the input length is not divisible by 3. This results in approximately a 33% size increase, which is the trade-off for making binary data safe to transmit over text-only protocols. Common use cases include embedding images as data URIs in HTML and CSS, encoding credentials in HTTP Basic Authentication headers, storing binary data in JSON or XML documents, and encoding email attachments via MIME. While Base64 is not encryption and offers no security, it is an essential tool for developers working with mixed binary and text data. This encoder handles Unicode characters correctly by converting them through UTF-8 encoding before applying Base64, ensuring international text is preserved accurately.