What is the difference between an ASCII code and a Unicode code point?

For characters 0 to 127 they are identical. Above 127 there is no ASCII code; the character has only a Unicode code point. This tool reports the Unicode code point and flags any character that is not plain ASCII.

Does it handle emoji and accented letters?

Yes. It reads characters with codePointAt and iterates with Array.from, so an emoji like 😀 is treated as a single character with code point U+1F600 rather than as two surrogate halves.

Why does my accented letter show a code above 127?

Accented and non-Latin letters live outside the 7-bit ASCII range. For example é is U+00E9 (decimal 233), so it is reported as a Unicode code point and marked non-ASCII.

What does the U+ column mean?

U+ is the standard Unicode notation: the code point written in hexadecimal with at least four digits. U+0041 is the letter A, and U+1F600 is the grinning-face emoji.

Are spaces and invisible characters shown?

Yes. A space is code 32 and appears in the table labelled (space). Any whitespace or punctuation you type is decoded just like a printable letter.

Character to ASCII / Unicode Code Converter

What this tool does

It turns text into numbers: for each character you type, it reports the underlying code point in several bases so you can see exactly how the text is encoded.

How it works

The input string is split into characters with Array.from, which iterates by Unicode code point rather than by 16-bit code unit. For each character the tool calls codePointAt(0) to get its numeric value, then formats that value in decimal, hexadecimal, octal, and the canonical U+ notation. Characters with a code point of 127 or less are plain ASCII; anything higher is flagged as non-ASCII because no ASCII code exists for it.

Reading code points (rather than UTF-16 code units) matters for characters above U+FFFF, such as emoji: a naive per-code-unit approach would split them into surrogate pairs and report two wrong numbers.

Example and notes

Typing Gé@ yields three rows: G is decimal 71 (U+0047), é is decimal 233 (U+00E9, flagged non-ASCII), and @ is decimal 64 (U+0040). For codes 0–127 the decimal value is both the ASCII code and the Unicode code point.

The copy button gives you the space-separated decimal codes for the whole string, which pairs naturally with the reverse code-to-character tool. Spaces and other whitespace are decoded too — a space is always code 32.