ASCII Table Lookup

Free ASCII Table Lookup

Browse the entire 128-character ASCII table with decimal, hex, octal, binary, and full descriptions for control characters. Filter instantly with the search box.

Common Uses

• Reference escape sequences in code
• Verify character codes in parsers
• Look up control characters during debugging
• Teach character encoding to students
• Build conversion utilities

How It Works

The table is generated client-side from a small lookup of control-character names plus runtime conversions for digits, letters, and punctuation. Search filters on every keystroke.

Privacy

All lookups happen locally. Nothing is sent anywhere.

Related: Text to Binary, Hex to Text, Binary to Decimal.

Printable vs Control Characters

printable — letters, digits, punctuation, space. Codes 0–31 and 127 are control characters inherited from teletypes:

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