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---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: curl_unescape
Section: 3
Source: libcurl
See-also:
- RFC 2396
- curl_easy_escape (3)
- curl_easy_unescape (3)
- curl_free (3)
---
# NAME
curl_unescape - URL decodes the given string
# SYNOPSIS
~~~c
#include <curl/curl.h>
char *curl_unescape(const char *input, int length);
~~~
# DESCRIPTION
Obsolete function. Use curl_easy_unescape(3) instead.
This function converts the URL encoded string **input** to a "plain string"
and return that as a new allocated string. All input characters that are URL
encoded (%XX where XX is a two-digit hexadecimal number) are converted to
their plain text versions.
If the **length** argument is set to 0, curl_unescape(3) calls
strlen() on **input** to find out the size.
You must curl_free(3) the returned string when you are done with it.
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
char *decoded = curl_unescape("%63%75%72%6c", 12);
if(decoded) {
/* do not assume printf() works on the decoded data */
printf("Decoded: ");
/* ... */
curl_free(decoded);
}
}
}
~~~
# AVAILABILITY
Since 7.15.4, curl_easy_unescape(3) should be used. This function might
be removed in a future release.
# RETURN VALUE
A pointer to a null-terminated string or NULL if it failed.
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