Text to Binary Converter

The converter takes each character's code number and writes it in base 2, padded with leading zeros to eight digits. Groups are separated by single spaces. The default input Hi gives 01001000 01101001.

Spaces, tabs and line breaks are characters too, so they get their own groups: a tab is and a line break is . The digit 0 is not 00000000; it has its own code, 48.

Compare A (01000001) with a (01100001). Only the third digit from the left changes, the one worth 32. That holds for every letter from A to Z, which is why lower-case codes are always 32 higher than capitals.

It is a quick way to check your work if you are encoding a word by hand for a puzzle or a class exercise. Capitals start with 010, lower-case letters with 011, and digits with 0011.

Outside plain English letters, digits and punctuation, the output is not UTF-8 bytes. Each character's internal code unit is written in binary as a single group, and that group can be longer than eight digits:

For the emoji, only the first half of its two-part code is written, so the binary can't be turned back into the emoji: decoding it gives a replacement character. If you need the actual bytes a file or network message would contain, use the UTF-8 column, not this tool's output.

The Binary to Text Converter reads space-separated groups, so keep the spaces when you copy the result. Plain ASCII text survives the round trip exactly, and so do symbols such as €, because their longer group is still read as one number. Emoji don't, for the reason above.