diff --git a/misc/tooth_log_converter/.gitignore b/misc/tooth_log_converter/.gitignore
new file mode 100644
index 0000000000..36dd5a9d2a
--- /dev/null
+++ b/misc/tooth_log_converter/.gitignore
@@ -0,0 +1,3 @@
+*.teeth
+*.csv
+log_convert
diff --git a/misc/tooth_log_converter/build.sh b/misc/tooth_log_converter/build.sh
new file mode 100755
index 0000000000..739e820806
--- /dev/null
+++ b/misc/tooth_log_converter/build.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+g++ -O2 -lstdc++ log_convert.cpp -o log_convert
diff --git a/misc/tooth_log_converter/log_convert.cpp b/misc/tooth_log_converter/log_convert.cpp
new file mode 100644
index 0000000000..375c539e3a
--- /dev/null
+++ b/misc/tooth_log_converter/log_convert.cpp
@@ -0,0 +1,46 @@
+#include <iostream>
+#include <fstream>
+#include <iomanip>
+
+typedef struct __attribute__ ((packed)) {
+	// the whole order of all packet bytes is reversed, not just the 'endian-swap' integers
+	uint32_t timestamp;
+	// unfortunately all these fields are required by TS...
+	bool priLevel : 1;
+	bool secLevel : 1;
+	bool trigger : 1;
+	bool sync : 1;
+	bool coil : 1;
+	bool injector : 1;
+} composite_logger_s;
+
+static_assert(sizeof(composite_logger_s) == 5);
+
+static inline uint32_t SWAP_UINT32(uint32_t x)
+{
+	return (((x >> 24) & 0x000000ff) | ((x <<  8) & 0x00ff0000) |
+			((x >>  8) & 0x0000ff00) | ((x << 24) & 0xff000000));
+}
+
+static constexpr double ticksPerSecond = 1e6;
+
+int main(int argc, char** argv)
+{
+	std::ifstream src(argv[1], std::ios::binary);
+	std::ofstream dst(argv[2], std::ios::binary);
+
+	dst << std::setprecision(10);
+
+	dst << "timestamp,pri,sec" << std::endl;
+
+	while (!src.eof())
+	{
+		composite_logger_s entry;
+
+		src.read(reinterpret_cast<char*>(&entry), sizeof(composite_logger_s));
+
+		double sec = SWAP_UINT32(entry.timestamp) / ticksPerSecond;
+
+		dst << sec << "," << entry.priLevel << "," << entry.secLevel << std::endl;
+	}
+}
diff --git a/misc/tooth_log_converter/readme.md b/misc/tooth_log_converter/readme.md
new file mode 100644
index 0000000000..1edf156ddc
--- /dev/null
+++ b/misc/tooth_log_converter/readme.md
@@ -0,0 +1,11 @@
+# SD Tooth Log Converter
+
+This program converts SD stored tooth logs to csv for analysis or replay as part of a unit test.
+
+Create a log by setting "SD logger mode" to "trigger", then restart the ECU with an SD card present (but without USB connected), then crank/run/etc the engine to save a log. Restart again with USB to pull the log off.
+
+# Usage
+
+`./build.sh`
+
+`./log_convert myToothLog.teeth convertedCsv.csv`