Text to Hex Converter

About the Text to Hex Converter

The text to hex converter first turns your text into bytes with the encoding you choose, then writes each byte as two hexadecimal digits. In UTF-8, plain English letters are one byte each, so Hello is 48 65 6C 6C 6F, an accented letter such as e with an acute accent is two bytes, C3 A9, the euro sign is three, E2 82 AC, and an emoji is four, such as F0 9F 98 80. UTF-16 uses two bytes for most characters and four for emoji, and the byte order matters: the letter A is 41 00 in little endian and 00 41 in big endian. Latin-1 uses one byte for the first 256 characters and refuses anything else, such as the euro sign, instead of replacing it with a question mark. Going back, the tool reads hex written as 48 65, 4865, 0x48,0x65, \x48\x65 or %48%65, and each byte must have exactly two digits, so a stray digit is reported with its position. Bytes that are not valid in the chosen encoding, such as an overlong UTF-8 sequence, a surrogate or a sequence cut short, are reported with the number of the first bad byte instead of being turned into a replacement character. Text with half of an emoji, a lone surrogate, cannot be encoded and is also reported. The conversions were compared with the codecs of Python on 20,000 random texts and 30,000 byte sequences, valid and damaged, and match, including the position of the first invalid UTF-8 byte. Everything runs in your browser and nothing is uploaded.