diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 4d7dbb5..1e1658c 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -84,6 +84,7 @@ jobs:
           "print.c",
           "random.c",
           "tmpfile.c",
+          "hashtable.c",
         ]
     runs-on: ubuntu-latest
     steps:
diff --git a/inc/libft.h b/inc/libft.h
index c00e135..a51e65c 100644
--- a/inc/libft.h
+++ b/inc/libft.h
@@ -6,7 +6,7 @@
 /*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/02/22 13:16:35 by brda-sil          #+#    #+#             */
-/*   Updated: 2024/02/24 00:52:13 by brda-sil         ###   ########.fr       */
+/*   Updated: 2024/04/29 06:01:14 by brda-sil         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -31,6 +31,7 @@
 # include "libft_error.h"
 # include "libft_network/ipv4.h"
 # include "libft_unit_test.h"
+# include "libft_hashtable.h"
 
 /* ########################################################################## */
 
diff --git a/inc/libft_hashtable.h b/inc/libft_hashtable.h
new file mode 100644
index 0000000..92922b6
--- /dev/null
+++ b/inc/libft_hashtable.h
@@ -0,0 +1,79 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   libft_hashtable.h                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2022/02/22 13:16:35 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:00:10 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef LIBFT_HASHTABLE_H
+# define LIBFT_HASHTABLE_H
+
+/* ########################################################################## */
+/* INCLUDE */
+/* ####### */
+
+# include "libft_memory.h"
+
+/* ########################################################################## */
+
+/* ########################################################################## */
+/* CONFIG */
+/* ###### */
+
+#define HT_SIZE		((1UL<<8) - 1)
+
+/* ########################################################################## */
+
+/* ########################################################################## */
+/* STRUCT */
+/* ###### */
+
+typedef struct _ht_item
+{
+	void			*value;
+	char			*key;
+	t_bool			is_deleted;
+	struct _ht_item	*next;
+}	ht_item;
+
+typedef struct _ht
+{
+	ht_item	**item;
+}	ht;
+
+/* ########################################################################## */
+
+/* ########################################################################## */
+/* FILES */
+/* ##### */
+
+// hashtable/ft_ht_free.c
+void		ft_ht_free(ht *table);
+
+// hashtable/ft_ht_get.c
+void		*ft_ht_get(ht *table, char *key);
+
+// hashtable/ft_ht_hash_key.c
+t_uint32	ft_ht_hash_key(const char *k);
+
+// hashtable/ft_ht_item.c
+ht_item		*ft_ht_new_item(char *key, void *value);
+ht_item		*ft_ht_add_item(ht_item **item, char *key, void *value);
+
+// hashtable/ft_ht_len.c
+t_size		ft_ht_len(ht table);
+
+// hashtable/ft_ht_new.c
+ht			*ft_ht_new();
+
+// hashtable/ft_ht_set.c
+t_bool		ft_ht_set(ht *table, char *key, void *value);
+
+/* ########################################################################## */
+
+#endif /* LIBFT_HASHTABLE_H */
diff --git a/mk/srcs.mk b/mk/srcs.mk
index e28d5a7..4c02c21 100644
--- a/mk/srcs.mk
+++ b/mk/srcs.mk
@@ -188,6 +188,15 @@ SRC_NET_IPV4 := network/ipv4/ft_htoi4.c \
 ### ERROR
 SRC_UNI_TEST := unit_test/ft_assert.c
 
+### HASHTABLE
+SRC_HASHTABLE := hashtable/ft_ht_free.c \
+				 hashtable/ft_ht_get.c \
+				 hashtable/ft_ht_hash_key.c \
+				 hashtable/ft_ht_item.c \
+				 hashtable/ft_ht_len.c \
+				 hashtable/ft_ht_new.c \
+				 hashtable/ft_ht_set.c
+
 ## if all, add all base to SRC_C
 ifeq ($(ALL),1)
 SRC_C				+= $(SRC_INT)
@@ -203,6 +212,7 @@ SRC_C				+= $(SRC_RDM)
 SRC_C				+= $(SRC_LNX)
 SRC_C				+= $(SRC_NET_IPV4)
 SRC_C				+= $(SRC_UNI_TEST)
+SRC_C				+= $(SRC_HASHTABLE)
 
 ## add base part to SRC_C
 else
@@ -245,6 +255,9 @@ endif
 ifeq ($(UNIT_TEST),1)
 SRC_C			+= $(SRC_UNI_TEST)
 endif
+ifeq ($(HASHTABLE),1)
+SRC_C			+= $(SRC_HASHTABLE)
+endif
 endif
 
 # OBJ
diff --git a/src/hashtable/ft_ht_free.c b/src/hashtable/ft_ht_free.c
new file mode 100644
index 0000000..9742c31
--- /dev/null
+++ b/src/hashtable/ft_ht_free.c
@@ -0,0 +1,33 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_ht_free.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/29 06:00:45 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:10:40 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+
+void	ft_ht_free(ht *table)
+{
+	ht_item		*ptr;
+	ht_item		*tmp;
+
+	for (unsigned long int i = 0; i < HT_SIZE; i++)
+	{
+		ptr = table->item[i];
+		while (ptr)
+		{
+			tmp = ptr->next;
+			free(ptr->key);
+			free(ptr);
+			ptr = tmp;
+		}
+	}
+	free(table->item);
+	free(table);
+}
diff --git a/src/hashtable/ft_ht_get.c b/src/hashtable/ft_ht_get.c
new file mode 100644
index 0000000..681ef21
--- /dev/null
+++ b/src/hashtable/ft_ht_get.c
@@ -0,0 +1,26 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_ht_get.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/29 06:00:45 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:02:55 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+
+void	*ft_ht_get(ht *table, char *key)
+{
+	t_uint32	key_hash = ft_ht_hash_key(key);
+	ht_item		*ptr = table->item[key_hash];
+	t_size		len_str = ft_strlen(key);
+
+	while (ptr && ft_strncmp(ptr->key, key, len_str))
+		ptr = ptr->next;
+	if (ptr)
+		return ptr->value;
+	return (FT_NULL);
+}
diff --git a/src/hashtable/ft_ht_hash_key.c b/src/hashtable/ft_ht_hash_key.c
new file mode 100644
index 0000000..7f628b4
--- /dev/null
+++ b/src/hashtable/ft_ht_hash_key.c
@@ -0,0 +1,41 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_ht_hash_key.c                                   :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/29 06:00:45 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:01:17 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+
+t_uint32	ft_ht_hash_key(const char *k)
+{
+	t_size		k_len = ft_strlen(k);
+	t_uint32	hash = 1;
+	t_size		index = 0;
+
+	while (TRUE)
+	{
+		if (index + 4 >= k_len)
+			break ;
+
+		hash = (hash * (*((t_uint32 *)(k + index))));
+		index += 4;
+	}
+
+	if (index != k_len)
+	{
+		unsigned char buff[4] = {0};
+
+		for (int i = 0; i + index < k_len; i++)
+			buff[i] = k[index + i];
+
+		hash = (hash * (*((t_uint32 *)(buff))));
+	}
+
+	return (hash % HT_SIZE);
+}
diff --git a/src/hashtable/ft_ht_item.c b/src/hashtable/ft_ht_item.c
new file mode 100644
index 0000000..0a05e84
--- /dev/null
+++ b/src/hashtable/ft_ht_item.c
@@ -0,0 +1,33 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_ht_item.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/29 06:01:50 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:02:01 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+
+ht_item *ft_ht_new_item(char *key, void *value)
+{
+	ht_item	*ptr;
+
+	ptr = (ht_item *)ft_calloc(1, sizeof(ht_item));
+	ptr->value = value;
+	ptr->key = ft_strdup(key);
+	return (ptr);
+}
+
+ht_item	*ft_ht_add_item(ht_item **item, char *key, void *value)
+{
+	ht_item	**ptr = item;
+
+	while (*ptr)
+		ptr = &((*ptr)->next);
+	*ptr = ft_ht_new_item(key, value);
+	return (*item);
+}
diff --git a/src/hashtable/ft_ht_len.c b/src/hashtable/ft_ht_len.c
new file mode 100644
index 0000000..c9b8b6a
--- /dev/null
+++ b/src/hashtable/ft_ht_len.c
@@ -0,0 +1,32 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_ht_len.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/29 06:00:45 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:11:05 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+
+t_size ft_ht_len(ht table)
+{
+	t_size	len = 0;
+	ht_item	*ptr;
+
+	for (unsigned long int i = 0; i < HT_SIZE; i++)
+	{
+		ptr = table.item[i];
+
+		while (ptr)
+		{
+			if (ptr->value)
+				len++;
+			ptr = ptr->next;
+		}
+	}
+	return (len);
+}
diff --git a/src/hashtable/ft_ht_new.c b/src/hashtable/ft_ht_new.c
new file mode 100644
index 0000000..2f2bc11
--- /dev/null
+++ b/src/hashtable/ft_ht_new.c
@@ -0,0 +1,22 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_ht_new.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/29 06:00:45 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:03:04 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+
+ht	*ft_ht_new()
+{
+	ht *table;
+
+	table = (ht *)ft_calloc(1, sizeof(ht));
+	table->item = (ht_item **)ft_calloc(HT_SIZE, sizeof(ht_item *));
+	return table;
+}
diff --git a/src/hashtable/ft_ht_set.c b/src/hashtable/ft_ht_set.c
new file mode 100644
index 0000000..78ddf95
--- /dev/null
+++ b/src/hashtable/ft_ht_set.c
@@ -0,0 +1,24 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_ht_set.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/04/29 06:00:45 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:03:46 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+
+t_bool	ft_ht_set(ht *table, char *key, void *value)
+{
+	t_uint32	key_hash = ft_ht_hash_key(key);
+
+	if (!table->item[key_hash])
+		table->item[key_hash] = ft_ht_new_item(key, value);
+	else
+		table->item[key_hash] = ft_ht_add_item(&table->item[key_hash], key, value);
+	return TRUE;
+}
diff --git a/test/src/hashtable.c b/test/src/hashtable.c
new file mode 100644
index 0000000..2ab46c9
--- /dev/null
+++ b/test/src/hashtable.c
@@ -0,0 +1,131 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   hashtable.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: brda-sil <brda-sil@students.42angouleme    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/03/31 22:56:30 by brda-sil          #+#    #+#             */
+/*   Updated: 2024/04/29 06:35:14 by brda-sil         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft_hashtable.h"
+#include <stdio.h>
+
+#ifndef CI_TEST
+# define CI_TEST FALSE
+#endif
+
+t_bool	KEY_TABLE[HT_SIZE] = {0};
+
+t_bin	test_hash_add_key(t_uint32 key)
+{
+	if (KEY_TABLE[key % HT_SIZE])
+		return (TRUE);
+	KEY_TABLE[key % HT_SIZE] = TRUE;
+	return (FALSE);
+}
+
+void	test_hash(char *str)
+{
+	printf("k:");
+	for (int i = 0; i < ft_strlen(str); i++)
+		printf("%02x", (unsigned char)str[i]);
+
+	t_uint32	key = ft_ht_hash_key(str);
+
+	printf("|h:%u", key);
+
+	if (test_hash_add_key(key))
+		printf(": Collision detected\n");
+	else
+		printf(": GOOD\n");
+}
+
+int	get_len_hash_table(void)
+{
+	int counter = 0;
+
+	for (unsigned long int i = 0; i < HT_SIZE; i++)
+		if (KEY_TABLE[i])
+			counter++;
+	return (counter);
+}
+
+void	test_collision(void)
+{
+	t_size			size = 2;
+	char	buff[size];
+
+	buff[size - 1] = 0;
+
+	for (int i = 0; i <= 0xff; i++)
+	{	buff[0] = i;
+		test_hash(buff);
+	}
+	printf("len %d\n", get_len_hash_table());
+}
+
+void ft_ht_enumerate(ht table)
+{
+	ht_item	*ptr;
+
+	for (unsigned long int i = 0; i < HT_SIZE; i++)
+	{
+		ptr = table.item[i];
+
+		while (ptr)
+		{
+			printf("[%03ld]  %-9s  %p\n", i, ptr->key, ptr->value);
+			ptr = ptr->next;
+		}
+	}
+}
+
+ht	*test_table(void)
+{
+	ht		*table = ft_ht_new();
+	char	buff[10];
+	int		i;
+
+	for (i = 0; i < 0xfff; i++)
+	{
+		ft_bzero(buff, 10);
+		ft_strcat(buff, "test_");
+		char *tmp = ft_itoa(i);
+		ft_strcat(buff, tmp);
+		free(tmp);
+		// printf("%s -> %d\n", buff, ft_ht_hash_key(buff));
+		ft_ht_set(table, buff, "value");
+	}
+	printf("len table %ld\n", ft_ht_len(*table));
+	return (table);
+}
+
+int	ci_test(void)
+{
+	test_collision();
+
+	ht	*test = test_table();
+
+	ft_ht_enumerate(*test);
+	printf("%s\n", ft_ht_get(test, "test_1"));
+	ft_ht_free(test);
+	return (0);
+}
+
+int	interactive(void)
+{
+	return (0);
+}
+
+int	main(void)
+{
+	if (CI_TEST)
+		return (ci_test());
+	else
+		return (interactive());
+	return (0);
+}
+