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Code to ASCII Converter

Convert numeric character codes back into ASCII / readable text.

Encoders & Decoders Runs in your browser

How do you convert character codes to ASCII?

Got a column of character codes from a textbook exercise or a debugger dump? Paste the numbers and this tool maps each one back to its character: 72 101 108 108 111 turns into Hello. Classic ASCII values 0–127 decode per the standard table, and larger inputs are treated as Unicode code points, so 8364 correctly produces the € sign.

How to use the Code to ASCII

  1. 1 Paste the code list from your table, exercise or program output.
  2. 2 Numbers split by commas, spaces or line breaks each decode to a character.
  3. 3 Review the assembled text and copy it out.

What you can use it for

  • Turning ASCII codes from a table into characters.
  • Decoding numeric output from another program.
  • Verifying a string-to-int or string-to-ASCII result.
  • Teaching how character codes map to letters.

Frequently asked questions

Which character codes are supported?
0 through 127 gives the ASCII set: control codes, digits, punctuation and letters. Anything higher is looked up as a Unicode code point, so 233 gives é and 128077 gives a thumbs-up emoji.
What separators are allowed?
The parser keys on digit runs, so commas, semicolons, whitespace or a pasted array literal all parse. 72,101 and 72 101 give identical output.
Why does code 10 print nothing visible?
Code 10 is the line feed control character, so it inserts a newline rather than a glyph. Codes 0 through 31 are all control characters and mostly render as nothing.

Related tools

UTF-8 to ASCII Strip text down to plain 7-bit ASCII, dropping non-ASCII characters. Byte to String Decode decimal byte values (0–255) back into a UTF-8 string. String to Int Convert a string to integer Unicode code points, space-separated.

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