ASCII Table

The designers placed the lowercase alphabet exactly 32 positions after the uppercase one, so the two cases differ by a single bit, bit six. That makes case conversion a one-bit operation: 65 is binary 1000001, 97 is 1100001. Every programming language inherits this layout.

Codes 0 through 31, plus 127 (DEL), are control characters rather than printable symbols. These ascii character codes were commands for teletype hardware, and a few remain everywhere: 9 is tab, 10 is line feed, 13 is carriage return, 27 is escape.

No, deliberately. The standard only defines 0 through 127, and the 128 to 255 range means different things in different legacy code pages like Latin-1 and Windows-1252. There's no single correct extended table, so this page sticks to the part that's universal.

Search for the character or its decimal code, then read the Binary column, which shows all seven bits zero-padded. For uppercase G, for instance, you'd search G and read 1000111 next to decimal 71.

CR, carriage return, is code 13, and LF, line feed, is code 10. Unix systems end lines with LF alone, while Windows uses the CRLF pair, which is why files hop between the two and diffs light up on every line.

It sits right on the boundary at code 32, the first position after the control block, and the table lists it explicitly as Space. Most definitions treat it as printable even though it leaves no visible mark.

Yes. The search field matches the Hex column, so entering 0x41 jumps straight to A. That's useful when you're staring at a hex dump and want to translate bytes back into readable text without doing the math.