diff --git a/quantum/keymap_extras/keymap_croatian.h b/quantum/keymap_extras/keymap_croatian.h
new file mode 100644
index 0000000000..4af5dc5875
--- /dev/null
+++ b/quantum/keymap_extras/keymap_croatian.h
@@ -0,0 +1,163 @@
+/* Copyright 2020
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program. If not, see .
+ */
+
+#pragma once
+
+#include "keymap.h"
+
+// clang-format off
+
+/*
+ * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐
+ * │ ¸ │ 1 │ 2 │ 3 │ 4 │ 5 │ 6 │ 7 │ 8 │ 9 │ 0 │ ' │ + │ │
+ * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤
+ * │ │ Q │ W │ E │ R │ T │ Z │ U │ I │ O │ P │ Š │ Đ │ │
+ * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ │
+ * │ │ A │ S │ D │ F │ G │ H │ J │ K │ L │ Č │ Ć │ Ž │ │
+ * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴────┤
+ * │ │ < │ Y │ X │ C │ V │ B │ N │ M │ , │ . │ - │ │
+ * ├────┼───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤
+ * │ │ │ │ │ │ │ │ │
+ * └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘
+ */
+// Row 1
+#define HR_CEDL KC_GRV // ¸ (dead)
+#define HR_1 KC_1 // 1
+#define HR_2 KC_2 // 2
+#define HR_3 KC_3 // 3
+#define HR_4 KC_4 // 4
+#define HR_5 KC_5 // 5
+#define HR_6 KC_6 // 6
+#define HR_7 KC_7 // 7
+#define HR_8 KC_8 // 8
+#define HR_9 KC_9 // 9
+#define HR_0 KC_0 // 0
+#define HR_QUOT KC_MINS // '
+#define HR_PLUS KC_EQL // +
+// Row 2
+#define HR_Q KC_Q // Q
+#define HR_W KC_W // W
+#define HR_E KC_E // E
+#define HR_R KC_R // R
+#define HR_T KC_T // T
+#define HR_Z KC_Y // Z
+#define HR_U KC_U // U
+#define HR_I KC_I // I
+#define HR_O KC_O // O
+#define HR_P KC_P // P
+#define HR_SCAR KC_LBRC // Š
+#define HR_DSTR KC_RBRC // Đ
+// Row 3
+#define HR_A KC_A // A
+#define HR_S KC_S // S
+#define HR_D KC_D // D
+#define HR_F KC_F // F
+#define HR_G KC_G // G
+#define HR_H KC_H // H
+#define HR_J KC_J // J
+#define HR_K KC_K // K
+#define HR_L KC_L // L
+#define HR_CCAR KC_SCLN // Č
+#define HR_CACU KC_QUOT // Ć
+#define HR_ZCAR KC_NUHS // Ž
+// Row 4
+#define HR_LABK KC_NUBS // <
+#define HR_Y KC_Z // Y
+#define HR_X KC_X // X
+#define HR_C KC_C // C
+#define HR_V KC_V // V
+#define HR_B KC_B // B
+#define HR_N KC_N // N
+#define HR_M KC_M // M
+#define HR_COMM KC_COMM // ,
+#define HR_DOT KC_DOT // .
+#define HR_MINS KC_SLSH // -
+
+/* Shifted symbols
+ * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐
+ * │ ¨ │ ! │ " │ # │ $ │ % │ & │ / │ ( │ ) │ = │ ? │ * │ │
+ * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤
+ * │ │ │ │ │ │ │ │ │ │ │ │ │ │ │
+ * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ │
+ * │ │ │ │ │ │ │ │ │ │ │ │ │ │ │
+ * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴────┤
+ * │ │ > │ │ │ │ │ │ │ │ ; │ : │ _ │ │
+ * ├────┼───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤
+ * │ │ │ │ │ │ │ │ │
+ * └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘
+ */
+// Row 1
+#define HR_DIAE S(HR_CEDL) // ¨ (dead)
+#define HR_EXLM S(HR_1) // !
+#define HR_DQUO S(HR_2) // "
+#define HR_HASH S(HR_3) // #
+#define HR_DLR S(HR_4) // $
+#define HR_PERC S(HR_5) // %
+#define HR_AMPR S(HR_6) // &
+#define HR_SLSH S(HR_7) // /
+#define HR_LPRN S(HR_8) // (
+#define HR_RPRN S(HR_9) // )
+#define HR_EQL S(HR_0) // =
+#define HR_QUES S(HR_QUOT) // ?
+#define HR_ASTR S(HR_PLUS) // *
+// Row 4
+#define HR_RABK S(HR_LABK) // >
+#define HR_SCLN S(HR_COMM) // ;
+#define HR_COLN S(HR_DOT) // :
+#define HR_UNDS S(HR_MINS) // _
+
+/* AltGr symbols
+ * ┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───────┐
+ * │ │ ~ │ ˇ │ ^ │ ˘ │ ° │ ˛ │ ` │ ˙ │ ´ │ ˝ │ │ │ │
+ * ├───┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─────┤
+ * │ │ \ │ | │ € │ │ │ │ │ │ │ │ ÷ │ × │ │
+ * ├─────┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┬──┴┐ │
+ * │ │ │ │ │ [ │ ] │ │ │ ł │ Ł │ │ ß │ ¤ │ │
+ * ├────┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴─┬─┴───┴────┤
+ * │ │ │ │ │ │ @ │ { │ } │ § │ │ │ │ │
+ * ├────┼───┴┬──┴─┬─┴───┴───┴───┴───┴───┴──┬┴───┼───┴┬────┬────┤
+ * │ │ │ │ │ │ │ │ │
+ * └────┴────┴────┴────────────────────────┴────┴────┴────┴────┘
+ */
+// Row 1
+#define HR_TILD ALGR(HR_1) // ~
+#define HR_CARN ALGR(HR_2) // ˇ (dead)
+#define HR_CIRC ALGR(HR_3) // ^ (dead)
+#define HR_BREV ALGR(HR_4) // ˘ (dead)
+#define HR_RNGA ALGR(HR_5) // ° (dead)
+#define HR_OGON ALGR(HR_6) // ˛ (dead)
+#define HR_GRV ALGR(HR_7) // `
+#define HR_DOTA ALGR(HR_8) // ˙ (dead)
+#define HR_ACUT ALGR(HR_9) // ´ (dead)
+#define HR_DACU ALGR(HR_0) // ˝ (dead)
+// Row 2
+#define HR_BSLS ALGR(HR_Q) // (backslash)
+#define HR_PIPE ALGR(HR_W) // |
+#define HR_EURO ALGR(HR_E) // €
+#define HR_DIV ALGR(HR_SCAR) // ÷
+#define HR_MUL ALGR(HR_DSTR) // ×
+// Row 3
+#define HR_LBRC ALGR(HR_F) // [
+#define HR_RBRC ALGR(HR_G) // ]
+#define HR_LLST ALGR(HR_K) // ł
+#define HR_CLST ALGR(HR_L) // Ł
+#define HR_SS ALGR(HR_CACU) // ß
+#define HR_CURR ALGR(HR_ZCAR) // ¤
+// Row 4
+#define HR_AT ALGR(HR_V) // @
+#define HR_LCBR ALGR(HR_B) // {
+#define HR_RCBR ALGR(HR_N) // }
+#define HR_SECT ALGR(HR_M) // §
diff --git a/quantum/keymap_extras/sendstring_croatian.h b/quantum/keymap_extras/sendstring_croatian.h
new file mode 100644
index 0000000000..67f75992ae
--- /dev/null
+++ b/quantum/keymap_extras/sendstring_croatian.h
@@ -0,0 +1,100 @@
+/* Copyright 2020
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program. If not, see .
+ */
+
+// Sendstring lookup tables for Croatian layouts
+
+#pragma once
+
+#include "keymap_croatian.h"
+#include "quantum.h"
+
+// clang-format off
+
+const uint8_t ascii_to_shift_lut[16] PROGMEM = {
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+
+ KCLUT_ENTRY(0, 1, 1, 1, 1, 1, 1, 0),
+ KCLUT_ENTRY(1, 1, 1, 0, 0, 0, 0, 1),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 1, 1, 0, 1, 1, 1),
+ KCLUT_ENTRY(0, 1, 1, 1, 1, 1, 1, 1),
+ KCLUT_ENTRY(1, 1, 1, 1, 1, 1, 1, 1),
+ KCLUT_ENTRY(1, 1, 1, 1, 1, 1, 1, 1),
+ KCLUT_ENTRY(1, 1, 1, 0, 0, 0, 0, 1),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0)
+};
+
+const uint8_t ascii_to_altgr_lut[16] PROGMEM = {
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(1, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 1, 1, 1, 1, 0),
+ KCLUT_ENTRY(1, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 0, 0, 0, 0, 0),
+ KCLUT_ENTRY(0, 0, 0, 1, 1, 1, 1, 0)
+};
+
+const uint8_t ascii_to_keycode_lut[128] PROGMEM = {
+ // NUL SOH STX ETX EOT ENQ ACK BEL
+ XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+ // BS TAB LF VT FF CR SO SI
+ KC_BSPC, KC_TAB, KC_ENT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+ // DLE DC1 DC2 DC3 DC4 NAK SYN ETB
+ XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+ // CAN EM SUB ESC FS GS RS US
+ XXXXXXX, XXXXXXX, XXXXXXX, KC_ESC, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+
+ // ! " # $ % & '
+ KC_SPC, HR_1, HR_2, HR_3, HR_4, HR_5, HR_6, HR_QUOT,
+ // ( ) * + , - . /
+ HR_8, HR_9, HR_PLUS, HR_PLUS, HR_COMM, HR_MINS, HR_DOT, HR_7,
+ // 0 1 2 3 4 5 6 7
+ HR_0, HR_1, HR_2, HR_3, HR_4, HR_5, HR_6, HR_7,
+ // 8 9 : ; < = > ?
+ HR_8, HR_9, HR_DOT, HR_COMM, HR_LABK, HR_0, HR_LABK, HR_QUOT,
+ // @ A B C D E F G
+ HR_V, HR_A, HR_B, HR_C, HR_D, HR_E, HR_F, HR_G,
+ // H I J K L M N O
+ HR_H, HR_I, HR_J, HR_K, HR_L, HR_M, HR_N, HR_O,
+ // P Q R S T U V W
+ HR_P, HR_Q, HR_R, HR_S, HR_T, HR_U, HR_V, HR_W,
+ // X Y Z [ \ ] ^ _
+ HR_X, HR_Y, HR_Z, HR_F, HR_Q, HR_G, HR_3, HR_MINS,
+ // ` a b c d e f g
+ HR_7, HR_A, HR_B, HR_C, HR_D, HR_E, HR_F, HR_G,
+ // h i j k l m n o
+ HR_H, HR_I, HR_J, HR_K, HR_L, HR_M, HR_N, HR_O,
+ // p q r s t u v w
+ HR_P, HR_Q, HR_R, HR_S, HR_T, HR_U, HR_V, HR_W,
+ // x y z { | } ~ DEL
+ HR_X, HR_Y, HR_Z, HR_B, HR_W, HR_N, HR_1, KC_DEL
+};