curl_version(3)

curl_version3

Returns the libcurl version string

Usage

#include <curl/curl.h>
char *curl_version();

Overview

Returns a human readable string with the version number of libcurl and some of its important components (like OpenSSL version).

For MultiSSL builds the string contains all SSL backend names and the inactive backend names are in parentheses. For example "(OpenSSL/3.0.8) Schannel" or "OpenSSL/3.0.8 (Schannel)".

We recommend using curl_version_info(3) instead.

Protocols

This functionality affects all supported protocols

Examples

int main(void)
{
  printf("libcurl version %s\n", curl_version());
}

Return value

A pointer to a null-terminated string. The string resides in a statically allocated buffer and must not be freed by the caller.

Releases

13 releases since Debian 3.0 (Woody); the text changed 10 times.

  1. 3.0
  2. 3.1–5.0
  3. 6.0
  4. 7
  5. 8
  6. 9
  7. 10
  8. 11
  9. 12
  10. 13
  11. Arch

Availability

Added in curl 7.1

From curl 8.23.0-1 in Arch Linux 2026-11-01. Parsed by carta from the page's man source.