---
name: "FcToLower"
section: "3"
platform: "linux"
package: "fontconfig"
version: "2:2.18.3-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/FcToLower"
---

# FcToLower(3)

convert upper case ASCII to lower case

## NAME

FcToLower - convert upper case ASCII to lower case

## SYNOPSIS

**#include \<fontconfig/fontconfig.h\>**

**FcChar8 FcToLower (FcChar8** *c***);**

## DESCRIPTION

This macro converts upper case ASCII *c* to the equivalent lower case letter.