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B64

Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 strings instantly

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What is Base64 Encoder/Decoder?

Encode any text string to Base64 format or decode Base64 back to readable text with this free online tool. Base64 encoding is commonly used for embedding binary data in text-based formats like JSON, HTML, and email. The tool supports full Unicode text and provides instant results with one click. Switch between encode and decode modes, and use the swap feature to quickly reverse your conversion.

How to Use Base64 Encoder/Decoder

  1. 1Select the mode — 'Encode' to convert text to Base64, or 'Decode' to convert Base64 back to text
  2. 2Type or paste your input into the text field
  3. 3Click the Encode or Decode button to process your input
  4. 4Copy the result from the output field, or click 'Swap' to use the output as the next input

Frequently Asked Questions

Base64 is a binary-to-text encoding scheme that represents binary data using a set of 64 ASCII characters (A-Z, a-z, 0-9, +, /). It is commonly used to embed images in HTML/CSS, transmit data over text-based protocols like email (MIME), and store binary data in JSON or XML.
No. Base64 is an encoding scheme, not an encryption method. It does not provide any security — anyone can decode a Base64 string back to its original form. For secure data, use proper encryption algorithms instead.
Base64 encoding increases the data size by approximately 33% because it represents every 3 bytes of input as 4 ASCII characters. This trade-off is necessary to safely transmit binary data through text-only channels.
Yes. This tool fully supports Unicode characters including emojis, accented characters, and non-Latin scripts. The text is properly encoded using UTF-8 before Base64 conversion.

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