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URLEncodedFormat
Last update:
May 18, 2026
Note: Adobe recommends that you use the EncodeForURL function, not the URLEncodedFormat function, to escape special characters in a string for use in a URL in all new applications.
Description
Generates a URL-encoded string. For example, it replaces spaces with %20, and non-alphanumeric characters with equivalent hexadecimal escape sequences. Passes arbitrary strings within a URL (ColdFusion automatically decodes URL parameters that are passed to a page).
Returns
A copy of a string, URL-encoded.
Category
Function syntax
URLEncodedFormat(string [, charset ])See also
URLDecode; Tags and functions for globalizing applications in the Developing ColdFusion Applications
History
ColdFusion MX 6.1: Changed the default encoding to be the response character encoding.
ColdFusion MX: Added the charset parameter.
Parameters
Parameter | Description |
string | A string or a variable that contains one |
charset | The character encoding in which the string is encoded. Optional.The following list includes commonly used values:
|
Usage
URL encoding formats some characters with a percent sign and the two-character hexadecimal representation of the character. For example, a character whose code is 129 is encoded as %81. A space is replaced with %20. Query strings in HTTP are always URL-encoded.
Example
<h3>URLEncodedFormat Example</h3>
<cfif IsDefined("url.myExample")>
<p>The url variable url.myExample was passed from the previous link ...
its value is:
<br><b>"<cfoutput>#url.myExample#</cfoutput>"</b>
</cfif>
<p>This function returns a URL encoded string.
<cfset s = "My url-encoded string has special characters & other stuff">
<p> <A HREF = "urlencodedformat.cfm?myExample=<cfoutput>#URLEncodedFormat(s)#
</cfoutput>">Click me</A>
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