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Base64 Encode / Decode

Encode/decode Base64 with full UTF-8 support (works correctly with any language).

Encode and decode Base64 for text, with full Unicode support (including Vietnamese text with diacritics). Commonly used to embed data in JSON, URLs, or data URIs.

How to use Base64 Encode/Decode

  1. Enter your text or Base64 string.
  2. Choose Encode or Decode.
  3. Copy the result.

Frequently asked questions

Is Base64 a form of secure encryption?

No. Base64 is just a way of representing data — anyone can decode it. For actual security, use an AES encryption tool instead.

Does it handle Vietnamese text with diacritics?

Yes. The tool handles UTF-8 correctly, so Vietnamese text with diacritics comes through accurately.

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🔒 Base64 Encode / Decode runs entirely in your browser — the data you enter is not sent to any server. Free, no sign-up required. See145 free dev tools more.