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Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings online. Free, instant, and works entirely in your browser.

Text → Base64

Try an example:

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About Base64 Encoder / Decoder

Encode any text or string to Base64 format, or decode Base64-encoded data back to readable text. Commonly used for encoding binary data in emails, data URIs, and API authentication. All encoding happens client-side for complete privacy.

How to Use Base64 Encoder / Decoder

  1. 1Enter text in the input field
  2. 2Click "Encode" to convert to Base64, or "Decode" to convert from Base64
  3. 3The result appears in the output field
  4. 4Copy the result with the copy button

Frequently Asked Questions

What is Base64 used for?
Encoding binary data as text, embedding images in CSS/HTML, and API authentication headers.
Can it handle Unicode characters?
Yes, it supports full UTF-8 encoding.
Is there a size limit?
No limit for text encoding. Very large strings may take a moment to process.

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