The Base64 Encoder & Decoder converts binary data, strings, and special characters into ASCII radix-64 representations and vice-versa (RFC 4648). Base64 encoding is widely used in web development, MIME email attachments, data URIs, authentication headers, and API payload transmission to ensure data survives transmission across text-only protocols without corruption.
Seamlessly convert plaintext to Base64 and decode Base64 strings back to UTF-8 plaintext with full Unicode support.
Properly encodes and decodes multi-byte international Unicode characters and emojis without byte sequence errors.
Choose between "Encode to Base64" or "Decode from Base64".
Enter your raw text or encoded Base64 string into the input editor.
Click Convert or watch the real-time output update, then copy with a single click.
No. Base64 is an encoding format designed for safe data transmission, not data confidentiality. Anyone can decode Base64 strings without a secret key.
Base64 represents 3 bytes (24 bits) of binary data using 4 ASCII characters (32 bits), resulting in an approximate 33% increase in string length.