What is Base64 encoding used for?

Base64 turns binary or text data into an ASCII-safe string, commonly used for embedding data in URLs, JSON, emails, and HTTP headers like Basic Auth.

Why does decoding sometimes fail?

The input must be valid Base64 (correct alphabet and padding). Extra whitespace or truncated strings will cause a decode error.

Yes, UTF-8 text (including emoji and non-Latin scripts) is encoded and decoded correctly.

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Input

Output

What is Base64 encoding used for?: Base64 turns binary or text data into an ASCII-safe string, commonly used for embedding data in URLs, JSON, emails, and HTTP headers like Basic Auth.
Why does decoding sometimes fail?: The input must be valid Base64 (correct alphabet and padding). Extra whitespace or truncated strings will cause a decode error.
Does this support Unicode text?: Yes, UTF-8 text (including emoji and non-Latin scripts) is encoded and decoded correctly.