Question 1

What is Base64 encoding?

Accepted Answer

Base64 is a binary-to-text encoding scheme that represents binary data as ASCII characters. It is commonly used for embedding images, email attachments (MIME), and safe data transport in URLs and JSON.

Question 2

Is Base64 encryption?

Accepted Answer

No, Base64 is encoding, not encryption — anyone can decode it. It provides no security and should be used for data transport, not for hiding sensitive information.

Question 3

Why does Base64 output end with = or ==?

Accepted Answer

The = characters are padding. Base64 encodes 3 bytes into 4 characters; padding fills the final group when the input length is not a multiple of 3.

Question 4

Can Base64 handle Unicode text?

Accepted Answer

Standard btoa() only handles Latin-1 characters. This tool uses TextEncoder for UTF-8 conversion, so emojis and non-Latin scripts work correctly.

Base64 Encoder & Decoder

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