Binary translates between plain text and its binary form — each character becomes its 8-bit code — and back again. It also shows the decimal and hexadecimal forms. Nothing is uploaded.

Text

⇅

Binary (space-separated bytes)

Decimal

Hexadecimal

Text is encoded as UTF-8, so non-Latin characters and emoji become several bytes. When reading binary back, spaces between bytes are optional — any run of 8 bits is treated as one byte. Everything runs on your device.