HesapHanem

UTF-8 Byte Encoder

Type any text to see its UTF-8 byte sequence and code points.

Result

9 bytes
6
43 61 66 C3 A9 20 E2 82 AC
U+0043 = 43 U+0061 = 61 U+0066 = 66 U+00E9 = C3 A9 U+0020 = 20 U+20AC = E2 82 AC

How it is calculated

Type or paste any text and the tool reads it as UTF-8 bytes. UTF-8 stores each Unicode code point in 1 to 4 bytes, decided by the leading byte:

0xxxxxxx = 1 byte (U+0000 to U+007F), 110xxxxx = 2 bytes, 1110xxxx = 3 bytes, 11110xxx = 4 bytes

The tool outputs the total byte count, the number of code points, all bytes in uppercase hex separated by spaces, and one line per code point in the form U+XXXX = bytes. The code point value is rebuilt from the data bits of the bytes. Note that the count is of code points, not of visible characters: an emoji built from several code points, or a letter plus a combining accent, counts as more than one.

Worked example

The text is "Café €". C, a, f and the space are plain ASCII, one byte each (43, 61, 66, 20). The é is U+00E9 and takes two bytes, C3 A9. The euro sign € is U+20AC and takes three, E2 82 AC. Total: 1 + 1 + 1 + 2 + 1 + 3 = 9 bytes for 6 characters. The full hex output is 43 61 66 C3 A9 20 E2 82 AC.

Try this example →

Common mistakes

  • Assuming one character is one byte. Accented letters take 2 bytes, many Asian characters 3, and emoji 4, so a 100-character message can exceed a 100-byte limit.
  • Comparing the byte count with a limit that is actually in UTF-16 units or characters, such as many database column types, instead of bytes.
  • Confusing code points with what the eye sees as one character; a flag or a family emoji is several code points joined together.
  • Copying text that contains hidden characters such as a non-breaking space or a zero-width joiner; they add bytes that you cannot see.
  • Reading the hex as a different encoding. These are UTF-8 bytes, which differ from Latin-1 or UTF-16 bytes for any character above U+007F.

Sources

About this calculator

UTF-8 encodes every Unicode code point as 1 to 4 bytes: ASCII characters (U+0000–U+007F) take a single byte, most Latin-extended and common symbols take 2 bytes, most CJK and other BMP characters take 3 bytes, and emoji and rarer characters outside the Basic Multilingual Plane take 4 bytes — which is why a string's byte length can be much larger than its character count once accents, non-Latin scripts, or emoji are involved.

This tool encodes any text to UTF-8 and shows the total byte length, the raw hex bytes, and a per-codepoint breakdown of how each character was encoded. Backend and mobile developers use it to debug byte-length limits in databases, APIs, or SMS/push-notification payloads where character count and byte count diverge, and students learning encoding use it to see the byte structure behind Unicode text firsthand.

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Comments (1)

  • Editorial team

    If an emoji gets dropped or turned into question marks when saved, paste it here and look at the breakdown. A code point above U+FFFF shows four bytes, and some older database setups, such as MySQL's three-byte utf8 character set, cannot store four-byte characters. A two- or three-byte character will not have that problem. Which string is being cut or garbled for you?

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