diff --git a/cscore/src/main/native/cpp/Image.h b/cscore/src/main/native/cpp/Image.h
index 5bc7a87349..110bee4994 100644
--- a/cscore/src/main/native/cpp/Image.h
+++ b/cscore/src/main/native/cpp/Image.h
@@ -34,7 +34,7 @@ class Image {
   Image& operator=(const Image&) = delete;
 
   // Getters
-  operator wpi::StringRef() const { return str(); }
+  operator wpi::StringRef() const { return str(); }  // NOLINT
   wpi::StringRef str() const { return wpi::StringRef(data(), size()); }
   size_t capacity() const { return m_data.capacity(); }
   const char* data() const {
diff --git a/cscore/src/main/native/windows/WindowsMessagePump.h b/cscore/src/main/native/windows/WindowsMessagePump.h
index 9693371a1d..97a3f2d018 100644
--- a/cscore/src/main/native/windows/WindowsMessagePump.h
+++ b/cscore/src/main/native/windows/WindowsMessagePump.h
@@ -12,7 +12,7 @@
 namespace cs {
 class WindowsMessagePump {
  public:
-  WindowsMessagePump(
+  explicit WindowsMessagePump(
       std::function<LRESULT(HWND, UINT, WPARAM, LPARAM)> callback);
   ~WindowsMessagePump();
 
diff --git a/hal/src/main/native/include/hal/SimDevice.h b/hal/src/main/native/include/hal/SimDevice.h
index 0808880cb7..b2e92f9182 100644
--- a/hal/src/main/native/include/hal/SimDevice.h
+++ b/hal/src/main/native/include/hal/SimDevice.h
@@ -322,7 +322,7 @@ class SimValue {
    *
    * @return internal handle
    */
-  operator HAL_SimValueHandle() const { return m_handle; }
+  operator HAL_SimValueHandle() const { return m_handle; }  // NOLINT
 
   /**
    * Gets the simulated value.
@@ -544,7 +544,7 @@ class SimDevice {
    *
    * @return internal handle
    */
-  operator HAL_SimDeviceHandle() const { return m_handle; }
+  operator HAL_SimDeviceHandle() const { return m_handle; }  // NOLINT
 
   /**
    * Creates a value on the simulated device.
diff --git a/hal/src/main/native/include/hal/Types.h b/hal/src/main/native/include/hal/Types.h
index 8ca0494160..1aba2c2983 100644
--- a/hal/src/main/native/include/hal/Types.h
+++ b/hal/src/main/native/include/hal/Types.h
@@ -96,7 +96,7 @@ class Handle {
     return *this;
   }
 
-  operator CType() const { return m_handle; }
+  operator CType() const { return m_handle; }  // NOLINT
 
  private:
   CType m_handle = CInvalid;
diff --git a/hal/src/main/native/include/hal/simulation/SimDataValue.h b/hal/src/main/native/include/hal/simulation/SimDataValue.h
index fe2998a9b0..4368a101bc 100644
--- a/hal/src/main/native/include/hal/simulation/SimDataValue.h
+++ b/hal/src/main/native/include/hal/simulation/SimDataValue.h
@@ -28,7 +28,7 @@ class SimDataValueBase : protected SimCallbackRegistryBase {
     return m_value;
   }
 
-  LLVM_ATTRIBUTE_ALWAYS_INLINE operator T() const { return Get(); }
+  LLVM_ATTRIBUTE_ALWAYS_INLINE operator T() const { return Get(); }  // NOLINT
 
   void Reset(T value) {
     std::scoped_lock lock(m_mutex);
diff --git a/wpigui/src/main/native/include/wpigui.h b/wpigui/src/main/native/include/wpigui.h
index 1c27233174..228f89d3ed 100644
--- a/wpigui/src/main/native/include/wpigui.h
+++ b/wpigui/src/main/native/include/wpigui.h
@@ -296,7 +296,7 @@ class Texture {
   /**
    * Implicit conversion to ImTextureID.
    */
-  operator ImTextureID() const { return m_texture; }
+  operator ImTextureID() const { return m_texture; }  // NOLINT
 
   /**
    * Gets the texture pixel format.
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h
index f7da59f530..08651ebbe1 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/InstantCommand.h
@@ -37,8 +37,8 @@ class InstantCommand : public CommandHelper<CommandBase, InstantCommand> {
    * @param toRun        the Runnable to run
    * @param requirements the subsystems required by this command
    */
-  InstantCommand(std::function<void()> toRun,
-                 wpi::ArrayRef<Subsystem*> requirements = {});
+  explicit InstantCommand(std::function<void()> toRun,
+                          wpi::ArrayRef<Subsystem*> requirements = {});
 
   InstantCommand(InstantCommand&& other) = default;
 
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h
index e04ceea9f3..2d994705f6 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/RunCommand.h
@@ -38,8 +38,8 @@ class RunCommand : public CommandHelper<CommandBase, RunCommand> {
    * @param toRun        the Runnable to run
    * @param requirements the subsystems to require
    */
-  RunCommand(std::function<void()> toRun,
-             wpi::ArrayRef<Subsystem*> requirements = {});
+  explicit RunCommand(std::function<void()> toRun,
+                      wpi::ArrayRef<Subsystem*> requirements = {});
 
   RunCommand(RunCommand&& other) = default;
 
diff --git a/wpilibNewCommands/src/main/native/include/frc2/command/SelectCommand.h b/wpilibNewCommands/src/main/native/include/frc2/command/SelectCommand.h
index 9710e54fcc..34062a3e26 100644
--- a/wpilibNewCommands/src/main/native/include/frc2/command/SelectCommand.h
+++ b/wpilibNewCommands/src/main/native/include/frc2/command/SelectCommand.h
@@ -48,8 +48,8 @@ class SelectCommand : public CommandHelper<CommandBase, SelectCommand<Key>> {
   template <class... Types,
             typename = std::enable_if_t<std::conjunction_v<
                 std::is_base_of<Command, std::remove_reference_t<Types>>...>>>
-  SelectCommand(std::function<Key()> selector,
-                std::pair<Key, Types>... commands)
+  explicit SelectCommand(std::function<Key()> selector,
+                         std::pair<Key, Types>... commands)
       : m_selector{std::move(selector)} {
     std::vector<std::pair<Key, std::unique_ptr<Command>>> foo;
 
diff --git a/wpilibc/src/main/native/include/frc/SerialPort.h b/wpilibc/src/main/native/include/frc/SerialPort.h
index 9323574a1a..9bbd9961ca 100644
--- a/wpilibc/src/main/native/include/frc/SerialPort.h
+++ b/wpilibc/src/main/native/include/frc/SerialPort.h
@@ -65,8 +65,9 @@ class SerialPort : public ErrorBase {
    * @param stopBits The number of stop bits to use as defined by the enum
    *                 StopBits.
    */
-  SerialPort(int baudRate, Port port = kOnboard, int dataBits = 8,
-             Parity parity = kParity_None, StopBits stopBits = kStopBits_One);
+  explicit SerialPort(int baudRate, Port port = kOnboard, int dataBits = 8,
+                      Parity parity = kParity_None,
+                      StopBits stopBits = kStopBits_One);
 
   /**
    * Create an instance of a Serial Port class.
diff --git a/wpilibc/src/main/native/include/frc/simulation/LinearSystemSim.h b/wpilibc/src/main/native/include/frc/simulation/LinearSystemSim.h
index eb59f48e80..db0a3a7ddc 100644
--- a/wpilibc/src/main/native/include/frc/simulation/LinearSystemSim.h
+++ b/wpilibc/src/main/native/include/frc/simulation/LinearSystemSim.h
@@ -36,8 +36,9 @@ class LinearSystemSim {
    * @param system             The system to simulate.
    * @param measurementStdDevs The standard deviations of the measurements.
    */
-  LinearSystemSim(const LinearSystem<States, Inputs, Outputs>& system,
-                  const std::array<double, Outputs>& measurementStdDevs = {})
+  explicit LinearSystemSim(
+      const LinearSystem<States, Inputs, Outputs>& system,
+      const std::array<double, Outputs>& measurementStdDevs = {})
       : m_plant(system), m_measurementStdDevs(measurementStdDevs) {
     m_x = Eigen::Matrix<double, States, 1>::Zero();
     m_y = Eigen::Matrix<double, Outputs, 1>::Zero();
diff --git a/wpilibc/src/main/native/include/frc/util/Color8Bit.h b/wpilibc/src/main/native/include/frc/util/Color8Bit.h
index bf4a31b6d6..f289865031 100644
--- a/wpilibc/src/main/native/include/frc/util/Color8Bit.h
+++ b/wpilibc/src/main/native/include/frc/util/Color8Bit.h
@@ -34,12 +34,12 @@ class Color8Bit {
    *
    * @param color The color
    */
-  constexpr Color8Bit(const Color& color)
+  constexpr Color8Bit(const Color& color)  // NOLINT
       : red(color.red * 255),
         green(color.green * 255),
         blue(color.blue * 255) {}
 
-  constexpr operator Color() const {
+  constexpr operator Color() const {  // NOLINT
     return Color(red / 255.0, green / 255.0, blue / 255.0);
   }
 
diff --git a/wpimath/src/main/native/include/frc/estimator/MerweScaledSigmaPoints.h b/wpimath/src/main/native/include/frc/estimator/MerweScaledSigmaPoints.h
index 26b4c7d2ea..36c593c517 100644
--- a/wpimath/src/main/native/include/frc/estimator/MerweScaledSigmaPoints.h
+++ b/wpimath/src/main/native/include/frc/estimator/MerweScaledSigmaPoints.h
@@ -37,8 +37,8 @@ class MerweScaledSigmaPoints {
    *             For Gaussian distributions, beta = 2 is optimal.
    * @param kappa Secondary scaling parameter usually set to 0 or 3 - States.
    */
-  MerweScaledSigmaPoints(double alpha = 1e-3, double beta = 2,
-                         int kappa = 3 - States) {
+  explicit MerweScaledSigmaPoints(double alpha = 1e-3, double beta = 2,
+                                  int kappa = 3 - States) {
     m_alpha = alpha;
     m_kappa = kappa;
 
diff --git a/wpiutil/src/main/native/include/wpi/future.h b/wpiutil/src/main/native/include/wpi/future.h
index 2d453d271e..5cb4a8d5d6 100644
--- a/wpiutil/src/main/native/include/wpi/future.h
+++ b/wpiutil/src/main/native/include/wpi/future.h
@@ -287,7 +287,7 @@ class future final {
   future(const future&) = delete;
 
   template <typename R>
-  future(future<R>&& oth) noexcept
+  future(future<R>&& oth) noexcept  // NOLINT
       : future(oth.then([](R&& val) -> T { return val; })) {}
 
   /**
diff --git a/wpiutil/src/main/native/include/wpi/uv/Buffer.h b/wpiutil/src/main/native/include/wpi/uv/Buffer.h
index d8735cde56..530ee79ca0 100644
--- a/wpiutil/src/main/native/include/wpi/uv/Buffer.h
+++ b/wpiutil/src/main/native/include/wpi/uv/Buffer.h
@@ -46,8 +46,8 @@ class Buffer : public uv_buf_t {
   ArrayRef<char> data() const { return ArrayRef<char>{base, len}; }
   MutableArrayRef<char> data() { return MutableArrayRef<char>{base, len}; }
 
-  operator ArrayRef<char>() const { return data(); }
-  operator MutableArrayRef<char>() { return data(); }
+  operator ArrayRef<char>() const { return data(); }   // NOLINT
+  operator MutableArrayRef<char>() { return data(); }  // NOLINT
 
   static Buffer Allocate(size_t size) { return Buffer{new char[size], size}; }