Base64 is a binary-to-text encoding scheme that converts arbitrary binary data (like images, files, or any sequence of bytes) into a safe, printable ASCII string using a 64-character alphabet (A–Z, a–z, 0–9, +, /). Browsers use it in JavaScript to embed binary data directly in code or HTML or for transmitting binary data as text.

This is an in-browser base64 benchmark:

• Visit the benchmark.