The
Uint8Array.fromHex()
static method creates a new
Uint8Array
object from a hexadecimal string.
This method parses the string into a byte array. To convert the string into a single number, use the
parseInt()
function with
radix
set to
16
instead.
A hexadecimal string encoding bytes to convert to a
Uint8Array
. The string must:
Have an even number of characters because two characters encode one byte.
Only contain characters in the hexadecimal alphabet, which includes 0–9 and A–F (case-insensitive).
Not contain whitespace (unlike
Uint8Array.prototype.setFromBase64()
).
A new
Uint8Array
object containing the decoded bytes from the hexadecimal string.
SyntaxError
Thrown if the input string contains characters outside the hex alphabet, or its length is odd.
TypeError
Thrown if the input string is not a string.
This example decodes a hexadecimal string into a
Uint8Array
.
const hexString = "cafed00d";
const bytes = Uint8Array.fromHex(hexString);
console.log(bytes); // Uint8Array [ 202, 254, 208, 13 ]
Uppercase characters are also supported:
