Base64 Encoder
FreeEncode text to Base64 or decode Base64 strings back to plain text, instantly in your browser.
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Choose Encode or Decode using the tabs.
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Paste your text or Base64 string into the input area.
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The result appears instantly — copy it with one click.
Frequently asked questions
Base64 is used to encode binary data for text-based protocols, embed images in CSS/HTML, and encode JWTs.
Yes, as long as the string is valid Base64. Invalid input shows an error message.
Yes. The encoder uses encodeURIComponent before btoa to handle Unicode correctly.
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