Base64 encoder

Encode plain text as Base64

The Base64 encoder converts readable text into an ASCII-safe representation that can travel through systems designed for text. Common uses include test payloads, data URIs, basic authentication experiments, and compatibility checks between applications.

When this tool helps

  • Prepare a small text sample for an API or configuration file.
  • Compare Base64 output across programming languages or command-line tools.
  • Create a reversible transport representation for non-sensitive text.

How to get a reliable result

  1. Enter the exact source text, preserving spaces and line breaks.
  2. Encode it once and copy the complete result without added formatting.
  3. Decode the result in a separate test to confirm a lossless round trip.

Practical example

Encoding Hello produces SGVsbG8=. A newline after Hello would produce different output, so hidden whitespace matters.

Important note

Encoded content remains recoverable by anyone who sees it. Never treat Base64 as a way to secure credentials or confidential information.