Question 1

What's the difference between Base64 and URL encoding?

Accepted Answer

Base64 uses A-Z, a-z, 0-9, +, / and = for padding, and represents binary data as ASCII text — ideal for embedding binary in JSON/XML or data URIs. URL encoding (percent-encoding) replaces unsafe characters with %XX where XX is the hex byte value — used in URLs and query strings.

Question 2

Can I encode emoji and CJK characters?

Accepted Answer

Yes. The tool fully supports Unicode and multi-byte characters. Emoji, Chinese, Japanese, and Korean text are encoded correctly using their UTF-8 byte representation, then converted to your chosen format (Base64, Hex, Binary, etc.).

Question 3

What is ROT13 used for?

Accepted Answer

ROT13 is a simple letter substitution cipher that shifts each letter by 13 positions in the alphabet. It's commonly used in online forums to hide spoilers, solutions, or punchlines. Since the alphabet has 26 letters, applying ROT13 twice returns the original text.

Question 4

Is my text sent to a server?

Accepted Answer

No. All encoding and decoding operations happen entirely in your browser using JavaScript. Your text never leaves your device.