Base64 Encoder/Decoder

Free online Base64 encoder and decoder tool. Supports text and file conversion. Client-side processing ensures data security.

About Base64

What is Base64?

Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation.

Common Uses

  • Email transmission (MIME)
  • Transmitting data in URLs
  • Embedding images in HTML/CSS (Data URI)

How it Works

The Base64 index table consists of: A-Z, a-z, 0-9, +, /.

Security

Base64 is an encoding scheme, NOT an encryption algorithm. It can be easily decoded and should not be used for securing sensitive data.

Features

  • Encoded data size increases by 33% (since every 6 bits of binary data become 8 bits of ASCII)
  • Safe for use in URLs
  • Safe for transmitting binary data
  • Suitable for scenarios where binary data needs to be sent over text-based protocols