Question 1

What is Base64 encoding?

Accepted Answer

Base64 is a binary-to-text-converter encoding scheme that converts binary data into a sequence of printable ASCII characters. It is widely used to embed images in HTML/CSS, include binary attachments in JSON, and transfer data through text-only channels like email.

Question 2

Is Base64 the same as encryption?

Accepted Answer

No. Base64 is encoding, not encryption. It only changes how data is represented — anyone can decode Base64-encoded data instantly without a key. Never use Base64 to protect sensitive information.

Question 3

Why does Base64 output end with = signs?

Accepted Answer

Base64 encodes data in 3-byte groups. When the input length is not a multiple of 3, one or two padding characters (=) are appended to align the output to a 4-character boundary.

Base64 编码器/解码器

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