ASCIIEdit

00 01 10 11 00000 NUL Spc @ ` 00001 SOH ! A a 00010 STX " B b 00011 ETX # C c 00100 EOT $ D d 00101 ENQ % E e 00110 ACK & F f 00111 BEL ’ G g 01000 BS ( H h 01001 TAB ) I i 01010 LF * J j 01011 VT + K k 01100 FF , L l 01101 CR - M m 01110 SO . N n 01111 SI / O o 10000 DLE 0 P p 10001 DC1 1 Q q 10010 DC2 2 R r 10011 DC3 3 S s 10100 DC4 4 T t 10101 NAK 5 U u 10110 SYN 6 V v 10111 ETB 7 W w 11000 CAN 8 X x 11001 EM 9 Y y 11010 SUB : Z z 11011 ESC ; [ { 11100 FS < \ | 11101 GS = ] } 11110 RS > ^ ~ 11111 US ? _ DEL

See also: A short C program for printing out ASCII values interactively