ASCII Table

What is the ASCII table?

The ASCII table lists the 128 characters of the American Standard Code for Information Interchange, numbered 0 to 127, and the number a computer uses for each. Capital A is 65, a space is 32, a line feed is 10. ASCII was standardised in the 1960s (RFC 20 reproduces it), and its 128 codes are still the first 128 code points of Unicode and the single-byte characters of UTF-8.

This page lists every code with its decimal value, its hex value and the character itself, or the control code's short name where there's nothing to print.

Searching the table

1. Leave the search box empty and click View to see all 128 rows.
2. Or start typing. The results update with every keystroke.
3. Copy the rows you need.

Each row reads like 65 0x41 A: decimal, hex, character. The search follows a few fixed rules, with exact matches listed first:

• A single character finds exactly that character, and case matters: a gives only 97 0x61 a, A gives only 65. A single digit also lists the control code with that decimal number after it, so 9 shows the digit 9 (57) and then TAB (9). Typing a single space finds Space.
• A plain number is a decimal code: 65 finds A and nothing else.
• A 0x or \x prefix means hex: 0x41 finds A, 0x7f finds DEL. Bare hex that contains a letter, such as 7f or 1b, is read as hex too.
• A name is matched without regard to case: esc, del, space, ff. Common aliases work as well: null finds NUL, newline or \n finds LF, \t finds TAB, \r or carriage return finds CR, escape finds ESC, delete finds DEL.
• Part of a control name comes after any exact match: dc lists DC1 to DC4.

How the 128 codes are organised

The layout is deliberate. A digit's code minus 48 gives its value, so '7' - '0' is 7 in C. Lowercase letters sit exactly 32 above their capitals, so switching case flips a single bit.

Control characters you still meet

Most of the 33 control codes were designed for teleprinters and are rarely used now. A handful matter every day:

CRLF line endings are required between HTTP/1.1 header lines by RFC 9112, which is why a stray bare LF can break a hand-written request. Unicode keeps these names for U+0000 to U+001F in its C0 Controls chart.

What the table doesn't cover

• Codes 128-255. "Extended ASCII" was never one standard; Windows-1252, ISO 8859-1 and old DOS code pages all disagree. This table sticks to real ASCII.
• Octal and binary columns. Only decimal and hex are listed. Use the base converters below if you need the others.
• Unicode lookups. Searching for é or an emoji returns "No matching ASCII characters found."
• Partial matches on letters and symbols. Only control names are searched by fragment; a multi-character string such as ab isn't split into its characters.

The table is generated in your browser from a fixed list, and your searches aren't sent anywhere.

Related tools

• Text to ASCII converts a whole string to its codes in one go.
• ASCII to text turns a list of codes back into readable characters.
• Hex to ASCII decodes a hex dump straight to text.
• Decimal to binary shows the bit pattern of any code from the table.