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Base64 Encoder / Decoder

Convert any text (including emoji and Indonesian characters) to Base64 and back — with validation for broken input.

How to use

  1. Pick Encode or Decode mode.
  2. Paste your input — result updates instantly.
  3. Copy the result.

Frequently asked questions

What is Base64 used for?

Encoding binary or special text into plain ASCII for APIs, data URIs, email attachments, and tokens.

Does it support Unicode and emoji?

Yes — encoding is UTF-8 safe on both server and browser sides.

Why does decode say invalid?

Base64 must use A-Z, a-z, 0-9, +, / and = padding. Whitespace is tolerated; other characters are rejected.