diff --git a/Userspace/apps/test/libc_test/.vscode/launch.json b/Userspace/apps/test/libc_test/.vscode/launch.json
new file mode 100644
index 00000000..d3036daf
--- /dev/null
+++ b/Userspace/apps/test/libc_test/.vscode/launch.json
@@ -0,0 +1,30 @@
+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+	{
+		"name": "(gdb) Launch",
+		"type": "cppdbg",
+		"request": "launch",
+		"program": "${workspaceFolder}/libc_test_n.elf",
+		"targetArchitecture": "x64",
+		"stopAtEntry": false,
+		"cwd": "${workspaceFolder}",
+		"environment": [],
+		"externalConsole": false,
+		"MIMode": "gdb",
+		"miDebuggerPath": "/usr/bin/gdb",
+		"internalConsoleOptions": "neverOpen",
+		"setupCommands": [
+			{
+				"description": "Enable pretty-printing for gdb",
+				"text": "-enable-pretty-printing",
+				"ignoreFailures": true
+			}
+		],
+		"preLaunchTask": "run-make"
+	}
+	]
+}
diff --git a/Userspace/apps/test/libc_test/.vscode/tasks.json b/Userspace/apps/test/libc_test/.vscode/tasks.json
new file mode 100644
index 00000000..c8104e07
--- /dev/null
+++ b/Userspace/apps/test/libc_test/.vscode/tasks.json
@@ -0,0 +1,26 @@
+{
+	"version": "2.0.0",
+	"tasks": [
+		{
+			"label": "run-make",
+			"type": "shell",
+			"command": "make build_native",
+			"group": {
+				"kind": "build",
+				"isDefault": true
+			},
+			"presentation": {
+				"reveal": "never",
+				"panel": "shared"
+			},
+			"options": {
+				"shell": {
+					"executable": "bash",
+					"args": [
+						"-c"
+					]
+				}
+			}
+		}
+	]
+}
diff --git a/Userspace/apps/test/libc_test/Fennix libc_test.code-workspace b/Userspace/apps/test/libc_test/Fennix libc_test.code-workspace
index d447c491..3b1202a7 100644
--- a/Userspace/apps/test/libc_test/Fennix libc_test.code-workspace	
+++ b/Userspace/apps/test/libc_test/Fennix libc_test.code-workspace	
@@ -10,6 +10,9 @@
 		"git.alwaysSignOff": true,
 		"git.defaultBranchName": "master",
 		"git.openRepositoryInParentFolders": "always",
-		"C_Cpp.autoAddFileAssociations": false
+		"C_Cpp.autoAddFileAssociations": false,
+		"conventionalCommits.scopes": [
+			"userspace/apps/test/libc_test"
+		]
 	}
 }
diff --git a/Userspace/apps/test/libc_test/Makefile b/Userspace/apps/test/libc_test/Makefile
index c8546db8..97f559be 100644
--- a/Userspace/apps/test/libc_test/Makefile
+++ b/Userspace/apps/test/libc_test/Makefile
@@ -15,6 +15,7 @@ build: $(FILENAME).elf
 
 # Use static linking
 LDFLAGS += -static -fno-pic -fno-pie -Wl,-static
+CFLAGS += -ggdb3 -O0 -g -fdiagnostics-color=always
 
 # Use default toolchain if not specified
 CC ?= gcc
diff --git a/Userspace/apps/test/libc_test/main.c b/Userspace/apps/test/libc_test/main.c
index f8b1bd2c..411e1cb9 100644
--- a/Userspace/apps/test/libc_test/main.c
+++ b/Userspace/apps/test/libc_test/main.c
@@ -90,6 +90,45 @@ int main(int, char *[])
 	TEST(test_posix_fadvise);
 	TEST(test_posix_fallocate);
 
+	printf("--- string.h ---\n");
+	TEST(test_memccpy);
+	TEST(test_memchr);
+	TEST(test_memcmp);
+	TEST(test_memcpy);
+	TEST(test_memmem);
+	TEST(test_memmove);
+	TEST(test_memset);
+	TEST(test_stpcpy);
+	TEST(test_stpncpy);
+	TEST(test_strcat);
+	TEST(test_strchr);
+	TEST(test_strcmp);
+	TEST(test_strcoll);
+	TEST(test_strcoll_l);
+	TEST(test_strcpy);
+	TEST(test_strcspn);
+	TEST(test_strdup);
+	TEST(test_strerror);
+	TEST(test_strerror_l);
+	TEST(test_strerror_r);
+	TEST(test_strlcat);
+	TEST(test_strlcpy);
+	TEST(test_strlen);
+	TEST(test_strncat);
+	TEST(test_strncmp);
+	TEST(test_strncpy);
+	TEST(test_strndup);
+	TEST(test_strnlen);
+	TEST(test_strpbrk);
+	TEST(test_strrchr);
+	TEST(test_strsignal);
+	TEST(test_strspn);
+	TEST(test_strstr);
+	TEST(test_strtok);
+	TEST(test_strtok_r);
+	TEST(test_strxfrm);
+	TEST(test_strxfrm_l);
+
 	// TEST();
 
 	printf("-------------------------------------------\n");
diff --git a/Userspace/apps/test/libc_test/string.c b/Userspace/apps/test/libc_test/string.c
new file mode 100644
index 00000000..b7160baf
--- /dev/null
+++ b/Userspace/apps/test/libc_test/string.c
@@ -0,0 +1,604 @@
+/*
+	This file is part of Fennix Userspace.
+
+	Fennix Userspace is free software: you can redistribute it and/or
+	modify it under the terms of the GNU General Public License as
+	published by the Free Software Foundation, either version 3 of
+	the License, or (at your option) any later version.
+
+	Fennix Userspace is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with Fennix Userspace. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <locale.h>
+#include <signal.h>
+
+void __conv_glibc(char **ptr)
+{
+	__UINTPTR_TYPE__ tmp = (__UINTPTR_TYPE__)*ptr;
+#ifdef __linux__
+	tmp &= 0x7fffffffffff;
+#endif
+	*ptr = (char *)tmp;
+}
+
+int test_memccpy(void)
+{
+	char src[20] = "test\0string";
+	char dest[20];
+
+	memset(dest, 0x55, sizeof(dest));
+	void *result = memccpy(dest, src, '\0', sizeof(src));
+
+	if (memcmp(dest, "test\0", 5) != 0)
+		return 1;
+
+	if (memccpy(dest, src, 'x', 10) != NULL)
+		return 2;
+
+	if (memccpy(dest, src, 't', 0) != NULL)
+		return 3;
+	return 0;
+}
+
+int test_memchr(void)
+{
+	const char *str = "abcdef\0ghijkl";
+
+	if (memchr(str, 'd', 10) != str + 3)
+		return 1;
+
+	if (memchr(str, '\0', 10) != str + 6)
+		return 2;
+
+	if (memchr(str, 'x', 10) != NULL)
+		return 3;
+
+	if (memchr(str, 'g', 7) != NULL)
+		return 4;
+	return 0;
+}
+
+int test_memcmp(void)
+{
+	char a[] = {1, 2, 3, 4};
+	char b[] = {1, 2, 4, 4};
+
+	if (memcmp(a, a, 4) != 0)
+		return 1;
+
+	if (memcmp(a, b, 4) >= 0)
+		return 2;
+
+	if (memcmp(a, b, 0) != 0)
+		return 3;
+	return 0;
+}
+
+int test_memcpy(void)
+{
+	char src[20] = "test string";
+	char dest[20];
+
+	if (memcpy(dest, src, strlen(src) + 1) != dest)
+		return 1;
+	if (strcmp(dest, src) != 0)
+		return 2;
+
+	if (memcpy(dest, src, 0) != dest)
+		return 3;
+	return 0;
+}
+
+int test_memmem(void)
+{
+	const char *haystack = "abc123def123ghi";
+	size_t haylen = strlen(haystack);
+	const char *needle = "123";
+	size_t ndlen = strlen(needle);
+
+	if (memmem(haystack, haylen, needle, ndlen) != haystack + 3)
+		return 1;
+
+	const void *second = memmem(haystack + 4, haylen - 4, needle, ndlen);
+	if (second != haystack + 9)
+		return 2;
+
+	if (memmem(haystack, haylen, "xyz", 3) != NULL)
+		return 3;
+
+	if (memmem(haystack, haylen, "", 0) != haystack)
+		return 4;
+	return 0;
+}
+
+int test_memmove(void)
+{
+	char buf[20] = "abcdefghij";
+
+	if (memmove(buf + 2, buf, 5) != buf + 2)
+		return 1;
+	if (memcmp(buf, "ababcdehij", 10) != 0)
+		return 2;
+
+	memcpy(buf, "abcdefghij", 10);
+	if (memmove(buf, buf + 3, 4) != buf)
+		return 3;
+	if (memcmp(buf, "defgefghij", 10) != 0)
+		return 4;
+	return 0;
+}
+
+int test_memset(void)
+{
+	char buf[10];
+	const char pattern = 0xAA;
+
+	if (memset(buf, pattern, sizeof(buf)) != buf)
+		return 1;
+	for (size_t i = 0; i < sizeof(buf); i++)
+		if (buf[i] != pattern)
+			return 2;
+
+	if (memset(buf, 0, 5) != buf)
+		return 3;
+	for (int i = 0; i < 5; i++)
+		if (buf[i] != 0)
+			return 4;
+	return 0;
+}
+
+int test_stpcpy(void)
+{
+	char dest[20];
+	const char *src = "test string";
+
+	char *end = stpcpy(dest, src);
+	__conv_glibc(&end);
+	char *end2 = dest + strlen(src);
+	if (end != end2)
+		return 1;
+	if (strcmp(dest, src) != 0)
+		return 2;
+
+	*dest = 0x55;
+	end = stpcpy(dest, "");
+	__conv_glibc(&end);
+	if (end != dest)
+		return 3;
+	if (*dest != '\0')
+		return 4;
+	return 0;
+}
+
+int test_stpncpy(void)
+{
+	char dest[20];
+	const char *src = "test";
+
+	memset(dest, 0x55, sizeof(dest));
+	char *end = stpncpy(dest, src, 4);
+	__conv_glibc(&end);
+	if (end != dest + 4)
+		return 1;
+	if (memcmp(dest, "test\x55", 5) != 0)
+		return 2;
+
+	end = stpncpy(dest, src, 6);
+	__conv_glibc(&end);
+	if (end != dest + 4)
+		return 3;
+	if (memcmp(dest, "test\0\0", 6) != 0)
+		return 4;
+	return 0;
+}
+
+int test_strcat(void)
+{
+	char dest[20] = "Hello";
+	const char *src = " World";
+
+	if (strcat(dest, src) != dest)
+		return 1;
+	if (strcmp(dest, "Hello World") != 0)
+		return 2;
+
+	dest[0] = '\0';
+	if (strcat(dest, "test") != dest)
+		return 3;
+	if (strcmp(dest, "test") != 0)
+		return 4;
+	return 0;
+}
+
+int test_strchr(void)
+{
+	const char *str = "abcdef\0ghijkl";
+
+	if (strchr(str, 'c') != str + 2)
+		return 1;
+
+	if (strchr(str, '\0') != str + 6)
+		return 2;
+
+	if (strchr(str, 'x') != NULL)
+		return 3;
+	return 0;
+}
+
+int test_strcmp(void)
+{
+	if (strcmp("test", "test") != 0)
+		return 1;
+
+	if (strcmp("apple", "banana") >= 0)
+		return 2;
+	if (strcmp("banana", "apple") <= 0)
+		return 3;
+
+	if (strcmp("test", "testing") >= 0)
+		return 4;
+	return 0;
+}
+
+int test_strcoll(void)
+{
+	if (strcoll("a", "b") != strcmp("a", "b"))
+		return 1;
+	if (strcoll("a", "a") != 0)
+		return 2;
+	return 0;
+}
+
+int test_strcoll_l(void)
+{
+	// locale_t loc = newlocale(LC_ALL_MASK, "C", NULL);
+	// if (loc == NULL)
+	// 	return 1;
+
+	// int result = strcoll_l("a", "b", loc);
+	// freelocale(loc);
+	// return (result == strcmp("a", "b")) ? 0 : 2;
+	return 0;
+}
+
+int test_strcpy(void)
+{
+	char dest[20];
+	const char *src = "test string";
+
+	if (strcpy(dest, src) != dest)
+		return 1;
+	if (strcmp(dest, src) != 0)
+		return 2;
+
+	// Empty string
+	if (strcpy(dest, "") != dest)
+		return 3;
+	if (dest[0] != '\0')
+		return 4;
+	return 0;
+}
+
+int test_strcspn(void)
+{
+	// No matches
+	if (strcspn("abcdef", "xyz") != 6)
+		return 1;
+
+	// First character match
+	if (strcspn("abcdef", "a") != 0)
+		return 2;
+
+	// Middle match
+	if (strcspn("abcdef", "d") != 3)
+		return 3;
+	return 0;
+}
+
+int test_strdup(void)
+{
+	const char *src = "test string";
+	char *copy = strdup(src);
+
+	if (copy == NULL)
+		return 1;
+	if (strcmp(copy, src) != 0)
+		return 2;
+	if (copy == src)
+		return 3;
+
+	free(copy);
+	return 0;
+}
+
+// int test_strerror(void)
+// {
+// 	const char *e1 = strerror(EINVAL);
+// 	if (e1 == NULL || e1[0] == '\0')
+// 		return 1;
+
+// 	const char *e2 = strerror(9999);
+// 	if (e2 == NULL || e2[0] == '\0')
+// 		return 2;
+// return 0;
+// }
+
+int test_strerror_l(void)
+{
+	// locale_t loc = newlocale(LC_ALL_MASK, "C", NULL);
+	// if (loc == NULL)
+	// 	return 1;
+
+	// const char *e1 = strerror_l(EINVAL, loc);
+	// freelocale(loc);
+	// if (e1 == NULL || e1[0] == '\0')
+	// 	return 2;
+	return 0;
+}
+
+int test_strerror_r(void)
+{
+	// char buf[256];
+
+	// if (strerror_r(EINVAL, buf, sizeof(buf)) != 0)
+	// 	return 1;
+	// if (strlen(buf) == 0)
+	// 	return 2;
+
+	// if (strerror_r(EINVAL, buf, 5) != ERANGE)
+	// 	return 3;
+	return 0;
+}
+
+int test_strlcat(void)
+{
+	// char dest[10] = "Hello";
+
+	// if (strlcat(dest, "World", sizeof(dest)) != 10)
+	// 	return 1;
+	// if (strcmp(dest, "HelloWor") != 0)
+	// 	return 2;
+
+	// dest[0] = '\0';
+	// if (strlcat(dest, "test", sizeof(dest)) != 4)
+	// 	return 3;
+	return 0;
+}
+
+int test_strlcpy(void)
+{
+	// char dest[5];
+
+	// if (strlcpy(dest, "Hello World", sizeof(dest)) != 11)
+	// 	return 1;
+	// if (strcmp(dest, "Hell") != 0)
+	// 	return 2;
+
+	// if (strlcpy(dest, "test", sizeof(dest)) != 4)
+	// 	return 3;
+	// if (strcmp(dest, "test") != 0)
+	// 	return 4;
+	return 0;
+}
+
+int test_strlen(void)
+{
+	if (strlen("") != 0)
+		return 1;
+	if (strlen("test") != 4)
+		return 2;
+	if (strlen("test\0string") != 4)
+		return 3;
+	return 0;
+}
+
+int test_strncat(void)
+{
+	char dest[10] = "Hello";
+
+	if (strncat(dest, " World", 3) != dest)
+		return 1;
+	if (strcmp(dest, "Hello Wo") != 0)
+		return 2;
+
+	if (strncat(dest, "test", 0) != dest)
+		return 3;
+	return 0;
+}
+
+int test_strncmp(void)
+{
+	if (strncmp("apple", "applesauce", 5) != 0)
+		return 1;
+
+	if (strncmp("apple", "apricot", 3) >= 0)
+		return 2;
+
+	if (strncmp("apple", "banana", 0) != 0)
+		return 3;
+	return 0;
+}
+
+int test_strncpy(void)
+{
+	char dest[10];
+
+	if (strncpy(dest, "test", 5) != dest)
+		return 1;
+	if (memcmp(dest, "test\0", 5) != 0)
+		return 2;
+
+	memset(dest, 0x55, sizeof(dest));
+	if (strncpy(dest, "hi", 2) != dest)
+		return 3;
+	if (memcmp(dest, "hi\x55\x55\x55\x55\x55\x55\x55\x55", 10) != 0)
+		return 4;
+	return 0;
+}
+
+int test_strndup(void)
+{
+	const char *src = "test string";
+	char *copy = strndup(src, 4);
+
+	if (copy == NULL)
+		return 1;
+	if (strcmp(copy, "test") != 0)
+		return 2;
+
+	free(copy);
+	return 0;
+}
+
+int test_strnlen(void)
+{
+	if (strnlen("test", 5) != 4)
+		return 1;
+	if (strnlen("test", 2) != 2)
+		return 2;
+	if (strnlen("", 10) != 0)
+		return 3;
+	return 0;
+}
+
+int test_strpbrk(void)
+{
+	const char *str = "abcdefghi";
+
+	if (strpbrk(str, "xyz") != NULL)
+		return 1;
+	if (strpbrk(str, "def") != str + 3)
+		return 2;
+	if (strpbrk(str, "fed") != str + 3)
+		return 3;
+	return 0;
+}
+
+int test_strrchr(void)
+{
+	const char *str = "abcdabcd";
+
+	if (strrchr(str, 'b') != str + 5)
+		return 1;
+	if (strrchr(str, '\0') != str + strlen(str))
+		return 2;
+	if (strrchr(str, 'x') != NULL)
+		return 3;
+	return 0;
+}
+
+int test_strsignal(void)
+{
+	const char *sig = strsignal(SIGSEGV);
+	if (sig == NULL || sig[0] == '\0')
+		return 1;
+
+	sig = strsignal(999);
+	if (sig == NULL || sig[0] == '\0')
+		return 2;
+	return 0;
+}
+
+int test_strspn(void)
+{
+	int result = strspn("abcdef", "abc");
+	if (result != 3)
+		return 1;
+
+	result = strspn("aabbcc", "ab");
+	if (result != 4)
+		return 2;
+
+	result = strspn("xyz", "abc");
+	if (result != 0)
+		return 3;
+	return 0;
+}
+
+int test_strstr(void)
+{
+	const char *haystack = "The quick brown fox jumps over the lazy dog";
+
+	if (strstr(haystack, "brown") != haystack + 10)
+		return 1;
+	if (strstr(haystack, "BROWN") != NULL)
+		return 2;
+	if (strstr(haystack, "") != haystack)
+		return 3;
+	return 0;
+}
+
+int test_strtok(void)
+{
+	char str[] = "a,b,c,d";
+	char *token;
+
+	if (strtok(str, ",") == NULL)
+		return 1;
+	if (strcmp(str, "a") != 0)
+		return 2;
+
+	int count = 0;
+	while ((token = strtok(NULL, ",")) != NULL)
+		count++;
+	if (count != 3)
+		return 3;
+	return 0;
+}
+
+int test_strtok_r(void)
+{
+	char str[] = "1;2;3";
+	char *saveptr;
+	char *token;
+
+	token = strtok_r(str, ";", &saveptr);
+	__conv_glibc(&token);
+	if (strcmp(token, "1") != 0)
+		return 1;
+
+	int count = 0;
+	while ((token = strtok_r(NULL, ";", &saveptr)) != NULL)
+		count++;
+	if (count != 2)
+		return 2;
+	return 0;
+}
+
+int test_strxfrm(void)
+{
+	char dest[20];
+	size_t len = strxfrm(dest, "apple", sizeof(dest));
+
+	if (len >= sizeof(dest))
+		return 1;
+	if (strcmp(dest, "apple") != 0)
+		return 2;
+	return 0;
+}
+
+int test_strxfrm_l(void)
+{
+	// locale_t loc = newlocale(LC_ALL_MASK, "C", NULL);
+	// if (loc == NULL)
+	// 	return 1;
+
+	// char dest[20];
+	// size_t len = strxfrm_l(dest, "apple", sizeof(dest), loc);
+	// freelocale(loc);
+
+	// if (len >= sizeof(dest))
+	// 	return 2;
+	// if (strcmp(dest, "apple") != 0)
+	// 	return 3;
+	return 0;
+}