Base64 Encoder & Decoder : UTF-8 Compliant Online Converter
The Calcivo Base64 Converter transforms arbitrary plaintext into ASCII Base64 representations and vice versa. It features full UTF-8 byte stream fidelity, optional URL-safe Base64URL encoding, and runs completely offline in client memory.
Interactive Calculator
100% Client-Side EngineEncoding vs Encryption: Base64 is an open binary-to-text representation scheme (RFC 4648), NOT cryptographic encryption. It provides zero confidentiality and can be decoded by anyone.
Step-by-Step Examples
Encoding International UTF-8 Text
Encoding multilingual string containing special characters and symbols.
Converts 13 ASCII characters into 16 Base64 output characters with trailing two-byte equals padding.
How to Use This Tool
- Choose your target operation: Encode (Text to Base64) or Decode (Base64 to Text).
- Toggle Base64URL mode if you need URL-safe characters (- and _) without padding.
- Type or paste your input; results render instantaneously.
- Click Copy Result to save the converted payload to your clipboard.
Frequently Asked Questions
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