curl_unescape - Man Page

URL decodes the given string


#include <curl/curl.h>

char *curl_unescape(const char *input, int length);


Obsolete function. Use curl_easy_unescape(3) instead!

This function will convert 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) will be converted to their plain text versions.

If the length argument is set to 0, curl_unescape(3) will use strlen() on input to find out the size.

You must curl_free(3) the returned string when you are done with it.


CURL *curl = curl_easy_init();
if(curl) {
  int decodelen;
  char *decoded = curl_unescape("%63%75%72%6c", 12, &decodelen);
  if(decoded) {
    /* do not assume printf() works on the decoded data! */
    printf("Decoded: ");
    /* ... */


Since 7.15.4, curl_easy_unescape(3) should be used. This function will be removed in a future release.

Return Value

A pointer to a null-terminated string or NULL if it failed.

See Also


Referenced By

curl_easy_unescape(3), curl_escape(3).

April 26, 2023 libcurl 8.1.2