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The static String.fromCharCode() method returns a string created from the specified sequence of UTF-16 code units.


String.fromCharCode(num1[, ...[, numN]])


num1, ..., numN
A sequence of numbers that are UTF-16 code units. The range is between 0 and 65535 (0xFFFF). Numbers greater than 0xFFFF are truncated. No validity checks are performed.

Return value

A string of length N consisting of the N specified UTF-16 code units.


This method returns a string and not a String object.

Because fromCharCode() is a static method of String, you always use it as String.fromCharCode(), rather than as a method of a String object you created.


Using fromCharCode()

The following example returns the string "ABC".

String.fromCharCode(65, 66, 67);  // returns "ABC"
String.fromCharCode(0x2014)       // returns "—"
String.fromCharCode(0x12014)      // also returns "—"; the digit 1 is truncated and ignored

Getting it to work with higher values

Although most common Unicode values can be represented with one 16-bit number (as expected early on during JavaScript standardization) and fromCharCode() can be used to return a single character for the most common values (i.e., UCS-2 values which are the subset of UTF-16 with the most common characters), in order to deal with ALL legal Unicode values (up to 21 bits), fromCharCode() alone is inadequate. Since the higher code point characters use two (lower value) "surrogate" numbers to form a single character, String.fromCodePoint() (part of the ES2015 standard) can be used to return such a pair and thus adequately represent these higher valued characters.


Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.2.
ECMAScript 5.1 (ECMA-262)
The definition of 'StringfromCharCode' in that specification.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'String.fromCharCode' in that specification.
ECMAScript Latest Draft (ECMA-262)
The definition of 'String.fromCharCode' in that specification.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes1 Yes Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes4 Yes Yes ?

See also

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