diff --git a/keyboards/szrkbd/szr35/board.h b/keyboards/szrkbd/szr35/board.h
new file mode 100644
index 00000000000..f18f715ed80
--- /dev/null
+++ b/keyboards/szrkbd/szr35/board.h
@@ -0,0 +1,9 @@
+// Copyright 2025 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include_next <board.h>
+
+#undef STM32_HSECLK
+#define STM32_HSECLK 16000000U
diff --git a/keyboards/szrkbd/szr35/config.h b/keyboards/szrkbd/szr35/config.h
new file mode 100644
index 00000000000..5a698086bbf
--- /dev/null
+++ b/keyboards/szrkbd/szr35/config.h
@@ -0,0 +1,8 @@
+// Copyright 2025 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define WS2812_PWM_DRIVER PWMD3
+#define WS2812_DMA_STREAM STM32_DMA1_STREAM2
+#define WS2812_DMA_CHANNEL 5
diff --git a/keyboards/szrkbd/szr35/halconf.h b/keyboards/szrkbd/szr35/halconf.h
new file mode 100644
index 00000000000..6945c89b9c0
--- /dev/null
+++ b/keyboards/szrkbd/szr35/halconf.h
@@ -0,0 +1,10 @@
+// Copyright 2025 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#define HAL_USE_PWM TRUE
+#define SERIAL_USB_BUFFERS_SIZE 256
+#define HAL_USE_SERIAL TRUE
+
+#include_next <halconf.h>
diff --git a/keyboards/szrkbd/szr35/keyboard.json b/keyboards/szrkbd/szr35/keyboard.json
new file mode 100644
index 00000000000..bb019862382
--- /dev/null
+++ b/keyboards/szrkbd/szr35/keyboard.json
@@ -0,0 +1,221 @@
+{
+    "keyboard_name": "SZR35",
+    "manufacturer": "SZRKB",
+    "maintainer": "diegorodriguezv",
+    "url": "https://github.com/diegorodriguezv/szr35",
+    "bootloader": "stm32-dfu",
+    "processor": "STM32F401",
+    "usb": {
+        "pid": "0x45D4",
+        "vid": "0x44DF",
+        "device_version": "0.0.1"
+    },
+    "features": {
+        "bootmagic": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true,
+        "rgb_matrix": true
+    },
+    "dynamic_keymap": {
+        "layer_count": 9
+    },
+    "eeprom": {
+        "wear_leveling": {
+            "backing_size": 4096
+        }
+    },
+    "matrix_pins": {
+        "direct": [
+            ["B4", "B0", "B1", "B12", "B13"],
+            ["B5", "C5", "B2", "B14", "B15"],
+            ["B3", "C4", "B10", "C9", "C11"],
+            ["NO_PIN", "NO_PIN", "A1", "C14", "C12"]
+        ]
+    },
+    "split": {
+        "enabled": true,
+        "serial": {
+            "driver": "usart",
+            "pin": "A9"
+        },
+        "handedness": {
+            "pin": "C7"
+        },
+        "matrix_pins": {
+            "right": {
+                "direct": [
+                    ["B2", "B10", "C10", "C11", "B6"],
+                    ["B0", "B1", "C12", "D2", "B7"],
+                    ["C5", "B12", "B3", "B4", "B5"],
+                    ["C4", "A1", "C13", "NO_PIN", "NO_PIN"]
+                ]
+            }
+        },
+        "transport": {
+            "sync": {
+                "activity": true,
+                "layer_state": true,
+                "matrix_state": true
+            },
+            "watchdog": true,
+            "watchdog_timeout": 3000
+        },
+        "bootmagic": {
+            "matrix": [4, 4]
+        }
+    },
+    "community_layouts": ["split_3x5_3"],
+    "layouts": {
+        "LAYOUT_split_3x5_3": {
+            "layout": [
+                { "matrix": [0, 0], "x": 0, "y": 0.3 },
+                { "matrix": [0, 1], "x": 1, "y": 0.1 },
+                { "matrix": [0, 2], "x": 2, "y": 0 },
+                { "matrix": [0, 3], "x": 3, "y": 0.1 },
+                { "matrix": [0, 4], "x": 4, "y": 0.2 },
+
+                { "matrix": [4, 0], "x": 8, "y": 0.2 },
+                { "matrix": [4, 1], "x": 9, "y": 0.1 },
+                { "matrix": [4, 2], "x": 10, "y": 0 },
+                { "matrix": [4, 3], "x": 11, "y": 0.1 },
+                { "matrix": [4, 4], "x": 12, "y": 0.3 },
+
+                { "matrix": [1, 0], "x": 0, "y": 1.3 },
+                { "matrix": [1, 1], "x": 1, "y": 1.1 },
+                { "matrix": [1, 2], "x": 2, "y": 1 },
+                { "matrix": [1, 3], "x": 3, "y": 1.1 },
+                { "matrix": [1, 4], "x": 4, "y": 1.2 },
+
+                { "matrix": [5, 0], "x": 8, "y": 1.2 },
+                { "matrix": [5, 1], "x": 9, "y": 1.1 },
+                { "matrix": [5, 2], "x": 10, "y": 1 },
+                { "matrix": [5, 3], "x": 11, "y": 1.1 },
+                { "matrix": [5, 4], "x": 12, "y": 1.3 },
+
+                { "matrix": [2, 0], "x": 0, "y": 2.3 },
+                { "matrix": [2, 1], "x": 1, "y": 2.1 },
+                { "matrix": [2, 2], "x": 2, "y": 2 },
+                { "matrix": [2, 3], "x": 3, "y": 2.1 },
+                { "matrix": [2, 4], "x": 4, "y": 2.2 },
+
+                { "matrix": [6, 0], "x": 8, "y": 2.2 },
+                { "matrix": [6, 1], "x": 9, "y": 2.1 },
+                { "matrix": [6, 2], "x": 10, "y": 2 },
+                { "matrix": [6, 3], "x": 11, "y": 2.1 },
+                { "matrix": [6, 4], "x": 12, "y": 2.3 },
+
+                { "matrix": [3, 2], "x": 3, "y": 3.7 },
+                { "matrix": [3, 3], "x": 4, "y": 3.7 },
+                { "matrix": [3, 4], "x": 5, "y": 3.2, "h": 1.5 },
+
+                { "matrix": [7, 0], "x": 7, "y": 3.2, "h": 1.5 },
+                { "matrix": [7, 1], "x": 8, "y": 3.7 },
+                { "matrix": [7, 2], "x": 9, "y": 3.7 }
+            ]
+        }
+    },
+    "ws2812": {
+        "driver": "pwm",
+        "pin": "A7"
+    },
+    "rgb_matrix": {
+        "driver": "ws2812",
+        "split_count": [18, 18],
+        "animations": {
+            "alphas_mods": true,
+            "gradient_up_down": true,
+            "gradient_left_right": true,
+            "breathing": true,
+            "band_sat": true,
+            "band_val": true,
+            "band_pinwheel_sat": true,
+            "band_pinwheel_val": true,
+            "band_spiral_sat": true,
+            "band_spiral_val": true,
+            "cycle_all": true,
+            "cycle_left_right": true,
+            "cycle_up_down": true,
+            "rainbow_moving_chevron": true,
+            "cycle_out_in": true,
+            "cycle_out_in_dual": true,
+            "cycle_pinwheel": true,
+            "cycle_spiral": true,
+            "dual_beacon": true,
+            "rainbow_beacon": true,
+            "rainbow_pinwheels": true,
+            "flower_blooming": true,
+            "raindrops": true,
+            "jellybean_raindrops": true,
+            "hue_breathing": true,
+            "hue_pendulum": true,
+            "hue_wave": true,
+            "pixel_rain": true,
+            "pixel_flow": true,
+            "pixel_fractal": true,
+            "typing_heatmap": true,
+            "digital_rain": true,
+            "solid_reactive_simple": true,
+            "solid_reactive": true,
+            "solid_reactive_wide": true,
+            "solid_reactive_cross": true,
+            "solid_reactive_nexus": true,
+            "splash": true,
+            "solid_splash": true,
+            "starlight_smooth": true,
+            "starlight": true,
+            "starlight_dual_sat": true,
+            "starlight_dual_hue": true,
+            "riverflow": true
+        },
+        "default": {
+            "animation": "solid_reactive_cross",
+            "sat": 0
+        },
+        "layout": [
+            {"matrix": [0, 4], "x": 96, "y": 15, "flags": 4},
+            {"matrix": [0, 3], "x": 72, "y": 15, "flags": 4},
+            {"matrix": [0, 2], "x": 48, "y": 15, "flags": 4},
+            {"matrix": [0, 1], "x": 24, "y": 15, "flags": 4},
+            {"matrix": [0, 0], "x": 0, "y": 15, "flags": 4},
+
+            {"matrix": [1, 4], "x": 96, "y": 30, "flags": 4},
+            {"matrix": [1, 3], "x": 72, "y": 30, "flags": 4},
+            {"matrix": [1, 2], "x": 48, "y": 30, "flags": 4},
+            {"matrix": [1, 1], "x": 24, "y": 30, "flags": 4},
+            {"matrix": [1, 0], "x": 0, "y": 30, "flags": 4},
+
+            {"matrix": [2, 4], "x": 96, "y": 45, "flags": 4},
+            {"matrix": [2, 3], "x": 72, "y": 45, "flags": 4},
+            {"matrix": [2, 2], "x": 48, "y": 45, "flags": 4},
+            {"matrix": [2, 1], "x": 24, "y": 45, "flags": 4},
+            {"matrix": [2, 0], "x": 0, "y": 45, "flags": 4},
+
+            {"matrix": [3, 4], "x": 96, "y": 63, "flags": 4},
+            {"matrix": [3, 3], "x": 72, "y": 63, "flags": 4},
+            {"matrix": [3, 2], "x": 48, "y": 63, "flags": 4},
+
+            {"matrix": [4, 4], "x": 223, "y": 15, "flags": 4},
+            {"matrix": [4, 3], "x": 192, "y": 15, "flags": 4},
+            {"matrix": [4, 2], "x": 168, "y": 15, "flags": 4},
+            {"matrix": [4, 1], "x": 144, "y": 15, "flags": 4},
+            {"matrix": [4, 0], "x": 120, "y": 15, "flags": 4},
+
+            {"matrix": [5, 4], "x": 223, "y": 30, "flags": 4},
+            {"matrix": [5, 3], "x": 192, "y": 30, "flags": 4},
+            {"matrix": [5, 2], "x": 168, "y": 30, "flags": 4},
+            {"matrix": [5, 1], "x": 144, "y": 30, "flags": 4},
+            {"matrix": [5, 0], "x": 120, "y": 30, "flags": 4},
+
+            {"matrix": [6, 4], "x": 223, "y": 45, "flags": 4},
+            {"matrix": [6, 3], "x": 192, "y": 45, "flags": 4},
+            {"matrix": [6, 2], "x": 168, "y": 45, "flags": 4},
+            {"matrix": [6, 1], "x": 144, "y": 45, "flags": 4},
+            {"matrix": [6, 0], "x": 120, "y": 45, "flags": 4},
+
+            {"matrix": [7, 2], "x": 168, "y": 63, "flags": 4},
+            {"matrix": [7, 1], "x": 144, "y": 63, "flags": 4},
+            {"matrix": [7, 0], "x": 120, "y": 63, "flags": 4}
+        ]
+    }
+}
diff --git a/keyboards/szrkbd/szr35/keymaps/default/keymap.c b/keyboards/szrkbd/szr35/keymaps/default/keymap.c
new file mode 100644
index 00000000000..97669d86202
--- /dev/null
+++ b/keyboards/szrkbd/szr35/keymaps/default/keymap.c
@@ -0,0 +1,66 @@
+// Copyright 2025 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+// Based loosely on https://peterxjang.com/blog/designing-a-36-key-custom-keyboard-layout.html
+// This is a good starting point for someone who is used to normal qwerty keyboards and wants to
+// switch easily between the 36-key keyboard and a laptop keyboard. The goal is to minimize the
+// learning curve by avoiding key relocation and maintaining our hard-earned muscle memory.
+
+#include QMK_KEYBOARD_H
+
+enum layers {
+    _LAYER_0,
+    _LAYER_1,
+    _LAYER_2,
+    _LAYER_3,
+};
+
+#define LAYER0 MO(_LAYER_0)
+#define LAYER1 MO(_LAYER_1)
+#define LAYER2 MO(_LAYER_2)
+#define LAYER3 MO(_LAYER_3)
+
+#define Z_SFT   LSFT_T(KC_Z)
+#define SLS_SFT RSFT_T(KC_SLSH)
+#define BSL_SFT RSFT_T(KC_BSLS)
+#define DEL_ALT LALT_T(KC_DEL)
+#define TAB_GUI LGUI_T(KC_TAB)
+#define ESC_CTL LCTL_T(KC_ESC)
+
+#define G_TAB G(KC_TAB)
+#define C_ESC C(KC_ESC)
+
+#define ENT_LY1 LT(_LAYER_1, KC_ENT)
+#define BSP_LY2 LT(_LAYER_2, KC_BSPC)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [_LAYER_0] = LAYOUT_split_3x5_3(
+    KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,         KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,
+    KC_A,    KC_S,    KC_D,    KC_F,    KC_G,         KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN,
+    Z_SFT,   KC_X,    KC_C,    KC_V,    KC_B,         KC_N,    KC_M,    KC_COMM, KC_DOT,  SLS_SFT,
+                      DEL_ALT, TAB_GUI, ESC_CTL,      KC_SPC,  ENT_LY1, BSP_LY2
+  ),
+
+  [_LAYER_1] = LAYOUT_split_3x5_3(
+    KC_1,    KC_2,    KC_3,    KC_4,    KC_5,         KC_6,    KC_7,    KC_8,    KC_9,    KC_0,
+    KC_GRV,  KC_HOME, KC_PGDN, KC_PGUP, KC_END,       KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT, KC_QUOT,
+    KC_LSFT, KC_BRID, KC_BRIU, XXXXXXX, XXXXXXX,      KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, BSL_SFT,
+                      XXXXXXX, G_TAB,   C_ESC,        XXXXXXX, _______, LAYER3
+  ),
+
+  [_LAYER_2] = LAYOUT_split_3x5_3(
+    KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,        KC_F6,   KC_F7,   KC_F8,   KC_F9,   KC_F10,
+    KC_F11,  KC_F12,  KC_MPRV, KC_MPLY, KC_MNXT,      MS_LEFT, MS_DOWN, MS_UP,   MS_RGHT, KC_PSCR,
+    KC_MUTE, KC_VOLD, KC_VOLU, MS_WHLD, MS_WHLU,      MS_BTN1, MS_BTN2, MS_BTN3, MS_BTN4, MS_BTN5,
+                      MS_ACL0, MS_ACL1, MS_ACL2,      XXXXXXX, LAYER3,  _______
+  ),
+
+  [_LAYER_3] = LAYOUT_split_3x5_3(
+    QK_BOOT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,      XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    RM_TOGG, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,      XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+    RM_NEXT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,      XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+                      XXXXXXX, XXXXXXX, XXXXXXX,      XXXXXXX, _______, _______
+  )
+
+};
diff --git a/keyboards/szrkbd/szr35/keymaps/factory/keymap.c b/keyboards/szrkbd/szr35/keymaps/factory/keymap.c
new file mode 100644
index 00000000000..c6cc4a02c5f
--- /dev/null
+++ b/keyboards/szrkbd/szr35/keymaps/factory/keymap.c
@@ -0,0 +1,48 @@
+// Copyright 2025 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include QMK_KEYBOARD_H
+
+enum layers {
+    _LAYER_0,
+    _LAYER_1,
+    _LAYER_2,
+    _LAYER_3,
+};
+
+#define LAYER0 MO(_LAYER_0)
+#define LAYER1 MO(_LAYER_1)
+#define LAYER2 MO(_LAYER_2)
+#define LAYER3 MO(_LAYER_3)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [_LAYER_0] = LAYOUT_split_3x5_3(
+      KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,       KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,
+      KC_A,    KC_S,    KC_D,    KC_F,    KC_G,       KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN,
+      KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,       KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH,
+                        KC_LGUI, LAYER1,  KC_SPC,     KC_ENT,  LAYER2,  KC_RGUI
+  ),
+
+  [_LAYER_1] = LAYOUT_split_3x5_3(
+      KC_TAB,  KC_1,    KC_2,    KC_3,    KC_4,       KC_5,    KC_6,    KC_7,    KC_8,    KC_9,
+      KC_LCTL, XXXXXXX, XXXXXXX, XXXXXXX, KC_LALT,    KC_RALT, KC_LEFT, KC_DOWN, KC_UP,   KC_RIGHT,
+      KC_LSFT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+                        KC_LGUI, _______, KC_SPC,     KC_ENT,  LAYER3,  KC_RGUI
+  ),
+
+  [_LAYER_2] = LAYOUT_split_3x5_3(
+      KC_TAB,  KC_EXLM, KC_AT,   KC_HASH, KC_DLR,     KC_RCTL, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN,
+      KC_LCTL, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    KC_RALT, KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC,
+      KC_LSFT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE,
+                        KC_LGUI, LAYER3,  KC_SPC,     KC_ENT,  _______, KC_RGUI
+  ),
+
+  [_LAYER_3] = LAYOUT_split_3x5_3(
+      QK_BOOT, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+      RM_TOGG, RM_HUEU, RM_SATU, RM_VALU, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+      RM_NEXT, RM_HUED, RM_SATD, RM_VALD, XXXXXXX,    XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX,
+                        KC_LGUI, _______, KC_SPC,     KC_ENT,  _______, KC_RGUI
+  )
+
+};
diff --git a/keyboards/szrkbd/szr35/mcuconf.h b/keyboards/szrkbd/szr35/mcuconf.h
new file mode 100644
index 00000000000..a70e4aa725b
--- /dev/null
+++ b/keyboards/szrkbd/szr35/mcuconf.h
@@ -0,0 +1,27 @@
+// Copyright 2025 QMK
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include_next <mcuconf.h>
+
+#undef STM32_SERIAL_USE_USART1
+#define STM32_SERIAL_USE_USART1 TRUE
+
+#undef STM32_PWM_USE_TIM3
+#define STM32_PWM_USE_TIM3 TRUE
+
+#undef STM32_PLLM_VALUE
+#define STM32_PLLM_VALUE 16
+
+#undef STM32_PLLN_VALUE
+#define STM32_PLLN_VALUE 192
+
+#undef STM32_PLLQ_VALUE
+#define STM32_PLLQ_VALUE 4
+
+#undef STM32_PPRE1
+#define STM32_PPRE1 STM32_PPRE1_DIV4
+
+#undef STM32_PPRE2
+#define STM32_PPRE2 STM32_PPRE2_DIV2
diff --git a/keyboards/szrkbd/szr35/readme.md b/keyboards/szrkbd/szr35/readme.md
new file mode 100644
index 00000000000..f137cb64e41
--- /dev/null
+++ b/keyboards/szrkbd/szr35/readme.md
@@ -0,0 +1,36 @@
+# SZR35 
+
+![szr35](https://i.ibb.co/vvQPBTF9/szr35.jpg)
+
+*The **SZR35** is a minimalist 36-key split keyboard. It follows the popular 3x5+3 layout and is aimed at users who value ergonomic typing, portability, and open-source firmware flexibility. It ships with Vial-compatible firmware and is built around an STM32 microcontroller.*
+
+* Keyboard Maintainer: [diegorodriguezv](https://github.com/diegorodriguezv)
+* Hardware:
+  * **Microcontroller:** STM32F401RBT6 (Cortex-M4, 256KB Flash, 64KB RAM)
+  * **Backlighting:** Addressable RGB (WS2812 or similar)
+  * **Connection:** USB-C on both halves, TRS jack for interconnect
+* Hardware Availability:
+  * [HardToChooseOne](https://hardtochooseone.com) on [Amazon](https://www.amazon.com/gp/product/B0DD69RGHK).
+  * Alternatively sold from other websites under the SZRKBD brand.
+
+Make example for this keyboard (after setting up your build environment):
+
+    make szrkbd/szr35:default
+
+If you want you can use the keymap that came with the keyboard from factory:
+
+    make szrkbd/szr35:factory
+
+You need to flash each half of the keyboard with the same firmware:
+
+    make szrkbd/szr35:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Holding top left key for the left half, top right key for the right half, while plugging in the USB cable.
+* **Physical reset button**: Short the reset pads, marked within a white rectangle, while plugging in. Not the ones at the edge opposing the USB connectors but about 2 or 3 centimeters from that edge.
+* **Keycode in layout**: Press the key mapped to `QK_BOOT` if it is available.