Encoding Tool · Live

Base64 Encoder and Decoder

Encode any text to base64 or decode base64 back to text. Runs entirely in your browser — nothing is uploaded.

Inputs

Mode

Encode text → base64 Decode base64 → text

Input

Result

Type or paste text/base64 to encode or decode.

What does this Base64 converter convert?

Base64 is an encoding that represents binary data using only the 64 ASCII characters A-Z, a-z, 0-9, + and /. Mostly used to embed images in HTML/CSS, transmit data through text-only channels, or obscure-but-not-secure encoding.

How conversion works

Encoding maps every 3 bytes of input to 4 characters of output (using a 64-symbol alphabet). The output is about 33% larger than the input.