---
name: "CURLOPT_CRLF"
section: "3"
platform: "macos"
package: "curl"
version: "166.0.0.0.1"
release: "macOS 26.5"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_CRLF"
---

# CURLOPT\_CRLF(3)

CRLF conversion

## NAME

CURLOPT\_CRLF - CRLF conversion

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CRLF, long conv);
```

## DESCRIPTION

Pass a long. If the value is set to 1 (one), libcurl converts Unix newlines to CRLF newlines on transfers. Disable this option again by setting the value to 0 (zero).

This is a legacy option of questionable use.

## DEFAULT

0

## PROTOCOLS

All

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/");
    curl_easy_setopt(curl, CURLOPT_CRLF, 1L);
    ret = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## AVAILABILITY

SMTP since 7.40.0, other protocols since they were introduced

## RETURN VALUE

Returns CURLE\_OK

## SEE ALSO

[**CURLOPT\_CONV\_FROM\_NETWORK\_FUNCTION**(3)](/CURLOPT_CONV_FROM_NETWORK_FUNCTION/3.md), [**CURLOPT\_CONV\_TO\_NETWORK\_FUNCTION**(3)](/CURLOPT_CONV_TO_NETWORK_FUNCTION/3.md)