Draw an ASCII Table
Generate a full 7-bit or extended 8-bit ASCII reference table with decimal, hex, octal and binary values.
Frequently Asked Questions
What is the difference between 7-bit and extended 8-bit ASCII?
Standard 7-bit ASCII covers codes 0-127 and is universally supported. Extended 8-bit ASCII adds codes 128-255, which vary by code page (this tool uses the common Latin-1/Windows-1252 mapping).
What do the DEC, HEX, OCT and BIN columns mean?
They show the same character code in decimal, hexadecimal, octal, and binary notation, which is useful when reading different programming or protocol documentation.
Why are some rows shown in a different color?
Control characters (codes 0-31 and 127) are shown in red since they are non-printable. Extended characters (128-255) are shown in a different color to mark them as outside the 7-bit range.
Can I copy or save the table?
Yes. Use Copy table to place a tab-separated version on your clipboard, or Download .txt to save it as a plain text file.