Frequently Asked Questions

Type text into the text box and it's instantly encoded as UTF-8 bytes shown in binary, hex, or decimal. Paste binary, hex, or decimal bytes into the other box and it's decoded straight back to text. Both directions update live as you type.

Yes, completely free with no sign-up and no limits.

UTF-8, the standard encoding used across the web. Each character becomes one or more bytes depending on the character — plain English letters take one byte, accented letters and many other scripts take two or three, and emoji typically take four.

UTF-8 represents each character using between 1 and 4 bytes depending on its Unicode code point. Emoji live at high code points, so most take 4 bytes each, while basic English letters and digits take just 1.

The binary input is split into 8-bit groups (bytes), each converted from binary to its numeric value, and the resulting byte sequence is decoded as UTF-8 back into readable text.

They show the exact same underlying bytes in a different base — hexadecimal (base 16) or decimal (base 10) instead of binary (base 2). Useful if you're working with byte data in a programming context that uses hex or decimal.

You'll see a clear error message explaining exactly what's wrong — such as a byte group that isn't 8 bits, or a value outside the valid range — instead of garbled or silently wrong output.

The ASCII / Unicode converter shows the code, hex, and binary for individual characters one at a time. This tool converts whole strings of text to and from continuous binary, hex, or decimal byte streams in both directions.

No. All conversion happens locally in your browser using the built-in TextEncoder and TextDecoder APIs. Nothing is sent to a server, stored, or logged.

Yes, the tool is fully responsive and works on any modern phone, tablet, or desktop browser.