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.

What is the Character to ASCII / Unicode Code Converter?

Convert any character to its ASCII or Unicode code point in decimal, hexadecimal, and octal, with the U+ form too. Handles emoji and accented letters correctly, processing each character in your browser. It runs free in your browser on Gera Tools, with nothing uploaded.

Character to ASCII / Unicode Code Converter

Name: Character to ASCII / Unicode Code Converter
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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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. This is useful for debugging encoding issues, building escaping logic, inspecting invisible control characters, or understanding how a string is stored at the byte level.

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.

ASCII vs Unicode: what each column means

Column	Format	Example for ‘A’	Notes
Decimal	Base 10	65	The number you would store in a C `char` variable
Hexadecimal	Base 16	0x41	How bytes appear in a hex editor or network packet dump
Octal	Base 8	0101	Used in C/Python escape sequences like `\101`
U+ notation	Unicode hex	U+0041	The canonical Unicode standard reference format

For codes 0–127 the decimal value is simultaneously the ASCII code and the Unicode code point — ASCII is a subset of Unicode.

Worked example

Typing Gé@😀 yields four rows:

Char	Decimal	Hex	U+	ASCII?
G	71	47	U+0047	Yes
é	233	E9	U+00E9	No
@	64	40	U+0040	Yes
😀	128512	1F600	U+1F600	No

The é and 😀 are flagged as non-ASCII. The grinning-face emoji has a code point above U+FFFF, which means it is encoded as a UTF-16 surrogate pair internally in JavaScript — but the tool reads it correctly as a single code point because it uses Array.from and codePointAt.

Common use cases

Debugging encoding issues. Mysterious characters appearing in a string are immediately identifiable by their code point.
Building escape sequences. If you need to embed a character in a JSON string or URL, its hex code is the basis for \uXXXX and %XX escaping.
Inspecting invisible characters. Paste text containing zero-width spaces (U+200B) or non-breaking spaces (U+00A0) to find them — they look blank but decode to non-zero codes.
Writing regex character ranges. Knowing the hex range of a character class helps write accurate character-class ranges in regular expressions.

The copy button gives you the space-separated decimal codes for the whole string, which pairs naturally with the reverse code-to-character tool. All processing runs locally in your browser.