Base64 Encoder / Decoder – Financial Calculators

IT Calculators Base64 Encoder / Decoder Encode and decode text using Base64. Supports Unicode (UTF-8) characters.

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What is Base64 & How does it work?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used to transmit data over media that only handles text, such as email attachments or data URLs in HTML. Every 3 bytes of input are converted into 4 Base64 characters. If the input length is not a multiple of 3, padding characters = are appended. Decoding reverses this process exactly.

Encoded = Base64(UTF-8(input))

Input size → encoded size ≈ ⌈n/3⌉ × 4 characters

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Parameters

Input Text

Mode

Input Character Count

chars

Input Byte Size (UTF-8)

bytes

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Result

Input Length — characters

Output Length — characters

Output Byte Size — bytes (UTF-8)

Encoded / Decoded Output

Results are for informational purposes only and do not constitute professional advice.