diff --git a/tools/run_flash_stm32_nix.py b/tools/run_flash_stm32_nix.py
new file mode 100644
index 000000000..61167a12b
--- /dev/null
+++ b/tools/run_flash_stm32_nix.py
@@ -0,0 +1,164 @@
+#!/usr/bin/env python
+'''
+*******************************************************
+ Copyright (c) MLRS project
+ GPL3
+ https://www.gnu.org/licenses/gpl-3.0.de.html
+ OlliW @ www.olliw.eu
+*******************************************************
+ run_flash_stm32.py
+ Linux or MacOS flash utility for STM32 mLRS targets
+ requires dfu-util (DFU) or st-flash (SWD)
+ version 8.06.2026
+********************************************************
+'''
+import os
+import sys
+import shutil
+import glob
+import argparse
+import subprocess
+
+
+#-- directories
+
+MLRS_PROJECT_DIR = os.path.normpath(os.path.join(os.path.dirname(os.path.abspath(__file__)), '..'))
+MLRS_TOOLS_DIR = os.path.join(MLRS_PROJECT_DIR, 'tools')
+MLRS_BUILD_DIR = os.path.join(MLRS_TOOLS_DIR, 'build')
+MLRS_FIRMWARE_DIR = os.path.join(MLRS_BUILD_DIR, 'firmware')
+RUN_MAKE_FIRMWARES = os.path.join(MLRS_TOOLS_DIR, 'run_make_firmwares.py')
+
+STM32_DFU_VID_PID = '0483:df11' # STM32 system (ROM) bootloader, as seen by dfu-util
+STM32_FLASH_BASE = 0x08000000   # all STM32 mLRS targets load here
+
+
+#-- build & firmware lookup
+
+def build_target(target, defines):
+    # build the matching target(s) via run_make_firmwares.py; return its exit code
+    cmd = [sys.executable, RUN_MAKE_FIRMWARES, '-t', target, '-np']
+    for d in defines:
+        cmd += ['-d', d]
+    print('building:', ' '.join(cmd))
+    return subprocess.call(cmd)
+
+
+def find_firmware_hex(target):
+    # .hex files in tools/build/firmware/ whose name contains the target substring
+    if not os.path.isdir(MLRS_FIRMWARE_DIR):
+        return []
+    hexes = []
+    for path in sorted(glob.glob(os.path.join(MLRS_FIRMWARE_DIR, '*.hex'))):
+        if target in os.path.basename(path):
+            hexes.append(path)
+    return hexes
+
+
+def choose_firmware(hexes):
+    # prompt the user to pick one firmware when several match
+    print('Multiple firmwares match the target:')
+    for i, path in enumerate(hexes):
+        print('  [%d] %s' % (i, os.path.basename(path)))
+    while True:
+        sel = input('Select firmware to flash [0-%d] (or q to abort): ' % (len(hexes)-1)).strip()
+        if sel.lower() == 'q':
+            return None
+        if sel.isdigit() and 0 <= int(sel) < len(hexes):
+            return hexes[int(sel)]
+        print('invalid selection')
+
+
+def hex_to_bin(hex_path):
+    # convert .hex to a .bin next to it via objcopy
+    objcopy = shutil.which('arm-none-eabi-objcopy') or shutil.which('objcopy')
+    if objcopy is None:
+        print('ERROR: objcopy not found on PATH (need arm-none-eabi-objcopy)')
+        return None
+    bin_path = os.path.splitext(hex_path)[0] + '.bin'
+    rc = subprocess.call([objcopy, '-I', 'ihex', '-O', 'binary', '--gap-fill', '0xFF', hex_path, bin_path])
+    if rc != 0:
+        print('ERROR: objcopy failed (return code %d)' % rc)
+        return None
+    print('converted %s -> %s' % (os.path.basename(hex_path), os.path.basename(bin_path)))
+    return bin_path
+
+
+#-- flash methods
+
+def flash_dfu(hex_path, target=None):
+    # flash via USB DFU with dfu-util; board must already be in DFU mode
+    if shutil.which('dfu-util') is None:
+        print('ERROR: dfu-util not found on PATH (e.g. brew install dfu-util)')
+        return 1
+    bin_path = hex_to_bin(hex_path)
+    if bin_path is None:
+        return 1
+    # append a DFU suffix so newer dfu-util versions accept the file
+    if shutil.which('dfu-suffix'):
+        vid, pid = STM32_DFU_VID_PID.split(':')
+        subprocess.call(['dfu-suffix', '-a', bin_path, '-v', '0x'+vid, '-p', '0x'+pid], stdout=subprocess.DEVNULL)
+    cmd = ['dfu-util', '-a', '0', '-d', STM32_DFU_VID_PID, '-s', '0x%08X' % STM32_FLASH_BASE, '-D', bin_path]
+    print('flashing (dfu):', ' '.join(cmd))
+    rc = subprocess.call(cmd)
+    if rc != 0:
+        return rc
+    print('flash complete - power-cycle / reset the board to run the new firmware')
+    return 0
+
+
+def flash_swd(hex_path, target=None):
+    # flash via SWD with st-link (st-flash reads ihex directly; --reset runs it after)
+    if shutil.which('st-flash') is None:
+        print('ERROR: st-flash not found on PATH (e.g. brew install stlink)')
+        return 1
+    cmd = ['st-flash', '--reset', '--format', 'ihex', 'write', hex_path]
+    print('flashing (swd):', ' '.join(cmd))
+    return subprocess.call(cmd)
+
+
+FLASH_METHODS = {
+    'dfu': flash_dfu,
+    'swd': flash_swd,
+}
+
+
+#-- app
+
+def main():
+    parser = argparse.ArgumentParser(description='Build an STM32 mLRS target and flash it to the board.')
+    parser.add_argument('-t', '--target', required=True,
+        help='target name (substring) to build and flash, e.g. tx-matek-mr24-30-g431kb')
+    parser.add_argument('-m', '--method', choices=sorted(FLASH_METHODS.keys()), default='dfu',
+        help='flashing method (default: dfu)')
+    parser.add_argument('-d', '--define', action='append', default=[], metavar='DEFINE',
+        help='extra -D define forwarded to the build (repeatable)')
+    args = parser.parse_args()
+
+    ret = build_target(args.target, args.define)
+    if ret != 0:
+        print('ERROR: build failed (run_make_firmwares.py returned %d)' % ret)
+        return ret
+
+    hexes = find_firmware_hex(args.target)
+    if not hexes:
+        print('ERROR: no firmware .hex matching "%s" in %s' % (args.target, MLRS_FIRMWARE_DIR))
+        return 1
+    if len(hexes) == 1:
+        hex_path = hexes[0]
+        print('firmware:', os.path.basename(hex_path))
+    else:
+        hex_path = choose_firmware(hexes)
+        if hex_path is None:
+            print('aborted')
+            return 1
+
+    ret = FLASH_METHODS[args.method](hex_path, args.target)
+    if ret == 0:
+        print('done')
+    else:
+        print('flashing failed (return code %d)' % ret)
+    return ret
+
+
+if __name__ == '__main__':
+    sys.exit(main())