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Base64 Encoder/Decoder

Encode text to Base64 or decode Base64 back to text. Supports Unicode/UTF-8 with instant conversion and byte size display.

Convert plain text to Base64 encoded string

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Result
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Base64 encoding converts binary data to ASCII text. Useful for embedding data in URLs, emails, and JSON. Supports full Unicode/UTF-8.

How to Use This Tool

  1. 1

    Choose Encode or Decode mode

    Select 'Encode' to convert plain text to Base64, or 'Decode' to convert a Base64 string back to readable text.

  2. 2

    Enter your input

    Paste or type your text (for encoding) or Base64 string (for decoding) into the input text area.

  3. 3

    View the result instantly

    The conversion happens in real time. The output appears below with input and output byte sizes displayed.

  4. 4

    Copy the output

    Click the 'Copy' button to copy the encoded or decoded result to your clipboard.

Frequently Asked Questions

What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data using 64 ASCII characters (A–Z, a–z, 0–9, +, /). It is commonly used to embed binary data in text-based formats like JSON, XML, and email.
Does Base64 encoding encrypt my data?
No. Base64 is an encoding, not encryption. Anyone can decode a Base64 string. It is meant for data transport, not security. For encryption, use tools like AES or RSA.
Why is the Base64 output larger than the input?
Base64 encoding increases data size by approximately 33%. Every 3 bytes of input become 4 Base64 characters, plus padding characters (=) if needed.
Does this tool support Unicode and emoji?
Yes. The encoder handles full Unicode text including emoji, CJK characters, and special symbols by first converting to UTF-8 bytes before Base64 encoding.