Question 1

Is my text sent to a server?

Accepted Answer

No. Everything runs in your browser with JavaScript. Nothing you type is uploaded, and closing the tab clears it.

Question 2

How are letters turned into binary?

Accepted Answer

Each character is encoded as UTF-8 bytes, and every byte is shown as 8 bits. 'A' becomes 01000001.

Question 3

Why do emoji give long output?

Accepted Answer

Characters outside basic English use several bytes in UTF-8, so they produce several groups of 8 bits.

Question 4

Do I need spaces between bytes?

Accepted Answer

No. When decoding, spaces are ignored but the total must be a multiple of 8 bits.

Text to binary converter

How to convert text to binary