diff --git a/AK/Bitmap.h b/AK/Bitmap.h
index 78a7735af92..671942de025 100644
--- a/AK/Bitmap.h
+++ b/AK/Bitmap.h
@@ -30,7 +30,7 @@ public:
         if (!data)
             return Error::from_errno(ENOMEM);
 
-        auto bitmap = Bitmap { (u8*)data, size, true };
+        auto bitmap = Bitmap { static_cast<u8*>(data), size, true };
         bitmap.fill(default_value);
         return bitmap;
     }
diff --git a/AK/BitmapView.h b/AK/BitmapView.h
index 3e026db2b49..1bfb823567f 100644
--- a/AK/BitmapView.h
+++ b/AK/BitmapView.h
@@ -64,19 +64,19 @@ public:
                 count += popcount(byte);
             }
             if (++first < last) {
-                size_t const* ptr_large = (size_t const*)(((FlatPtr)first + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1));
-                if ((u8 const*)ptr_large > last)
-                    ptr_large = (size_t const*)last;
-                while (first < (u8 const*)ptr_large) {
+                size_t const* ptr_large = reinterpret_cast<size_t const*>((reinterpret_cast<FlatPtr>(first) + sizeof(size_t) - 1) & ~(sizeof(size_t) - 1));
+                if (reinterpret_cast<u8 const*>(ptr_large) > last)
+                    ptr_large = reinterpret_cast<size_t const*>(last);
+                while (first < reinterpret_cast<u8 const*>(ptr_large)) {
                     count += popcount(*first);
                     first++;
                 }
-                size_t const* last_large = (size_t const*)((FlatPtr)last & ~(sizeof(size_t) - 1));
+                size_t const* last_large = reinterpret_cast<size_t const*>(reinterpret_cast<FlatPtr>(last) & ~(sizeof(size_t) - 1));
                 while (ptr_large < last_large) {
                     count += popcount(*ptr_large);
                     ptr_large++;
                 }
-                for (first = (u8 const*)ptr_large; first < last; first++)
+                for (first = reinterpret_cast<u8 const*>(ptr_large); first < last; first++)
                     count += popcount(*first);
             }
         }
@@ -100,12 +100,12 @@ public:
             // We will use hint as what it is: a hint. Because we try to
             // scan over entire 32 bit words, we may start searching before
             // the hint!
-            size_t const* ptr_large = (size_t const*)((FlatPtr)&m_data[hint / 8] & ~(sizeof(size_t) - 1));
-            if ((u8 const*)ptr_large < &m_data[0]) {
+            size_t const* ptr_large = reinterpret_cast<size_t const*>(reinterpret_cast<FlatPtr>(&m_data[hint / 8]) & ~(sizeof(size_t) - 1));
+            if (reinterpret_cast<u8 const*>(ptr_large) < &m_data[0]) {
                 ptr_large++;
 
                 // m_data isn't aligned, check first bytes
-                size_t start_ptr_large = (u8 const*)ptr_large - &m_data[0];
+                size_t start_ptr_large = reinterpret_cast<u8 const*>(ptr_large) - &m_data[0];
                 size_t i = 0;
                 u8 byte = VALUE ? 0x00 : 0xff;
                 while (i < start_ptr_large && m_data[i] == byte)
@@ -120,14 +120,14 @@ public:
             }
 
             size_t val_large = VALUE ? 0x0 : NumericLimits<size_t>::max();
-            size_t const* end_large = (size_t const*)((FlatPtr)end & ~(sizeof(size_t) - 1));
+            size_t const* end_large = reinterpret_cast<size_t const*>(reinterpret_cast<FlatPtr>(end) & ~(sizeof(size_t) - 1));
             while (ptr_large < end_large && *ptr_large == val_large)
                 ptr_large++;
 
             if (ptr_large == end_large) {
                 // We didn't find anything, check the remaining few bytes (if any)
                 u8 byte = VALUE ? 0x00 : 0xff;
-                size_t i = (u8 const*)ptr_large - &m_data[0];
+                size_t i = reinterpret_cast<u8 const*>(ptr_large) - &m_data[0];
                 size_t byte_count = m_size / 8;
                 VERIFY(i <= byte_count);
                 while (i < byte_count && m_data[i] == byte)
@@ -137,7 +137,7 @@ public:
                         return {}; // We already checked from the beginning
 
                     // Try scanning before the hint
-                    end = (u8 const*)((FlatPtr)&m_data[hint / 8] & ~(sizeof(size_t) - 1));
+                    end = reinterpret_cast<u8 const*>(reinterpret_cast<FlatPtr>(&m_data[hint / 8]) & ~(sizeof(size_t) - 1));
                     hint = 0;
                     continue;
                 }
@@ -154,7 +154,7 @@ public:
             if constexpr (!VALUE)
                 val_large = ~val_large;
             VERIFY(val_large != 0);
-            return ((u8 const*)ptr_large - &m_data[0]) * 8 + bit_scan_forward(val_large) - 1;
+            return (reinterpret_cast<u8 const*>(ptr_large) - &m_data[0]) * 8 + bit_scan_forward(val_large) - 1;
         }
     }
 
@@ -207,7 +207,7 @@ public:
 
         size_t bit_size = 8 * sizeof(size_t);
 
-        size_t* bitmap = (size_t*)m_data;
+        size_t* bitmap = reinterpret_cast<size_t*>(m_data);
 
         // Calculating the start offset.
         size_t start_bucket_index = from / bit_size;
diff --git a/AK/BumpAllocator.h b/AK/BumpAllocator.h
index 81cd9dbf192..21348a4df0c 100644
--- a/AK/BumpAllocator.h
+++ b/AK/BumpAllocator.h
@@ -65,7 +65,7 @@ public:
         for_each_chunk([&](auto chunk) {
             if (!cache_filled) {
                 cache_filled = true;
-                ((ChunkHeader*)chunk)->next_chunk = 0;
+                (reinterpret_cast<ChunkHeader*>(chunk))->next_chunk = 0;
                 chunk = s_unused_allocation_cache.exchange(chunk);
                 if (!chunk)
                     return;
@@ -86,7 +86,7 @@ protected:
     {
         auto head_chunk = m_head_chunk;
         while (head_chunk) {
-            auto& chunk_header = *(ChunkHeader const*)head_chunk;
+            auto& chunk_header = *reinterpret_cast<ChunkHeader const*>(head_chunk);
             VERIFY(chunk_header.magic == chunk_magic);
             if (head_chunk == m_current_chunk)
                 VERIFY(chunk_header.next_chunk == 0);
@@ -100,7 +100,7 @@ protected:
     {
         // dbgln("Allocated {} entries in previous chunk and have {} unusable bytes", m_allocations_in_previous_chunk, m_chunk_size - m_byte_offset_into_current_chunk);
         // m_allocations_in_previous_chunk = 0;
-        void* new_chunk = (void*)s_unused_allocation_cache.exchange(0);
+        void* new_chunk = reinterpret_cast<void*>(s_unused_allocation_cache.exchange(0));
         if (!new_chunk) {
             if constexpr (use_mmap) {
 #ifdef AK_OS_SERENITY
@@ -117,24 +117,24 @@ protected:
             }
         }
 
-        auto& new_header = *(ChunkHeader*)new_chunk;
+        auto& new_header = *reinterpret_cast<ChunkHeader*>(new_chunk);
         new_header.magic = chunk_magic;
         new_header.next_chunk = 0;
         m_byte_offset_into_current_chunk = sizeof(ChunkHeader);
 
         if (!m_head_chunk) {
             VERIFY(!m_current_chunk);
-            m_head_chunk = (FlatPtr)new_chunk;
-            m_current_chunk = (FlatPtr)new_chunk;
+            m_head_chunk = reinterpret_cast<FlatPtr>(new_chunk);
+            m_current_chunk = reinterpret_cast<FlatPtr>(new_chunk);
             return true;
         }
 
         VERIFY(m_current_chunk);
-        auto& old_header = *(ChunkHeader*)m_current_chunk;
+        auto& old_header = *reinterpret_cast<ChunkHeader*>(m_current_chunk);
         VERIFY(old_header.magic == chunk_magic);
         VERIFY(old_header.next_chunk == 0);
-        old_header.next_chunk = (FlatPtr)new_chunk;
-        m_current_chunk = (FlatPtr)new_chunk;
+        old_header.next_chunk = reinterpret_cast<FlatPtr>(new_chunk);
+        m_current_chunk = reinterpret_cast<FlatPtr>(new_chunk);
         return true;
     }
 
diff --git a/AK/ByteBuffer.h b/AK/ByteBuffer.h
index 61ebf051a69..064613f0958 100644
--- a/AK/ByteBuffer.h
+++ b/AK/ByteBuffer.h
@@ -296,7 +296,7 @@ private:
         // This is most noticable in Lagom, where kmalloc_good_size is just a no-op.
         new_capacity = max(new_capacity, (capacity() * 3) / 2);
         new_capacity = kmalloc_good_size(new_capacity);
-        auto* new_buffer = (u8*)kmalloc(new_capacity);
+        auto* new_buffer = static_cast<u8*>(kmalloc(new_capacity));
         if (!new_buffer)
             return Error::from_errno(ENOMEM);
 
diff --git a/AK/DeprecatedString.h b/AK/DeprecatedString.h
index 98e264385e1..9f6091404d7 100644
--- a/AK/DeprecatedString.h
+++ b/AK/DeprecatedString.h
@@ -276,7 +276,7 @@ public:
     {
         if (buffer.is_empty())
             return empty();
-        return DeprecatedString((char const*)buffer.data(), buffer.size(), should_chomp);
+        return DeprecatedString(reinterpret_cast<char const*>(buffer.data()), buffer.size(), should_chomp);
     }
 
     [[nodiscard]] static DeprecatedString vformatted(StringView fmtstr, TypeErasedFormatParams&);
diff --git a/AK/NonnullOwnPtr.h b/AK/NonnullOwnPtr.h
index 5f9b516c4fc..26f8d6b0f56 100644
--- a/AK/NonnullOwnPtr.h
+++ b/AK/NonnullOwnPtr.h
@@ -188,7 +188,7 @@ template<typename T>
 struct Traits<NonnullOwnPtr<T>> : public GenericTraits<NonnullOwnPtr<T>> {
     using PeekType = T*;
     using ConstPeekType = T const*;
-    static unsigned hash(NonnullOwnPtr<T> const& p) { return ptr_hash((FlatPtr)p.ptr()); }
+    static unsigned hash(NonnullOwnPtr<T> const& p) { return ptr_hash(p.ptr()); }
     static bool equals(NonnullOwnPtr<T> const& a, NonnullOwnPtr<T> const& b) { return a.ptr() == b.ptr(); }
 };
 
diff --git a/AK/StdLibExtras.h b/AK/StdLibExtras.h
index 67e6b3ac3bd..c369322c26a 100644
--- a/AK/StdLibExtras.h
+++ b/AK/StdLibExtras.h
@@ -134,8 +134,8 @@ inline void swap(T& a, U& b)
 {
     if (&a == &b)
         return;
-    U tmp = move((U&)a);
-    a = (T &&) move(b);
+    U tmp = move(static_cast<U&>(a));
+    a = static_cast<T&&>(move(b));
     b = move(tmp);
 }
 
diff --git a/AK/StringHash.h b/AK/StringHash.h
index 396fefb1162..b5966adb3c2 100644
--- a/AK/StringHash.h
+++ b/AK/StringHash.h
@@ -14,7 +14,7 @@ constexpr u32 string_hash(char const* characters, size_t length, u32 seed = 0)
 {
     u32 hash = seed;
     for (size_t i = 0; i < length; ++i) {
-        hash += (u32)characters[i];
+        hash += static_cast<u32>(characters[i]);
         hash += (hash << 10);
         hash ^= (hash >> 6);
     }
diff --git a/AK/StringView.h b/AK/StringView.h
index 027ad6a886a..dd6fe9540ec 100644
--- a/AK/StringView.h
+++ b/AK/StringView.h
@@ -26,13 +26,13 @@ public:
         , m_length(length)
     {
         if (!is_constant_evaluated())
-            VERIFY(!Checked<uintptr_t>::addition_would_overflow((uintptr_t)characters, length));
+            VERIFY(!Checked<uintptr_t>::addition_would_overflow(reinterpret_cast<uintptr_t>(characters), length));
     }
     ALWAYS_INLINE StringView(unsigned char const* characters, size_t length)
-        : m_characters((char const*)characters)
+        : m_characters(reinterpret_cast<char const*>(characters))
         , m_length(length)
     {
-        VERIFY(!Checked<uintptr_t>::addition_would_overflow((uintptr_t)characters, length));
+        VERIFY(!Checked<uintptr_t>::addition_would_overflow(reinterpret_cast<uintptr_t>(characters), length));
     }
     ALWAYS_INLINE StringView(ReadonlyBytes bytes)
         : m_characters(reinterpret_cast<char const*>(bytes.data()))
diff --git a/AK/Traits.h b/AK/Traits.h
index 901d97ed5d7..29334b41f74 100644
--- a/AK/Traits.h
+++ b/AK/Traits.h
@@ -59,7 +59,7 @@ struct Traits<T> : public GenericTraits<T> {
 
 template<typename T>
 requires(IsPointer<T> && !Detail::IsPointerOfType<char, T>) struct Traits<T> : public GenericTraits<T> {
-    static unsigned hash(T p) { return ptr_hash((FlatPtr)p); }
+    static unsigned hash(T p) { return ptr_hash(p); }
     static constexpr bool is_trivial() { return true; }
 };
 
diff --git a/AK/Types.h b/AK/Types.h
index 4c9d26e0197..c60a5ed1830 100644
--- a/AK/Types.h
+++ b/AK/Types.h
@@ -97,9 +97,9 @@ static constexpr FlatPtr explode_byte(u8 b)
         return value << 56 | value << 48 | value << 40 | value << 32 | value << 24 | value << 16 | value << 8 | value;
 }
 
-static_assert(explode_byte(0xff) == (FlatPtr)0xffffffffffffffffull);
-static_assert(explode_byte(0x80) == (FlatPtr)0x8080808080808080ull);
-static_assert(explode_byte(0x7f) == (FlatPtr)0x7f7f7f7f7f7f7f7full);
+static_assert(explode_byte(0xff) == static_cast<FlatPtr>(0xffffffffffffffffull));
+static_assert(explode_byte(0x80) == static_cast<FlatPtr>(0x8080808080808080ull));
+static_assert(explode_byte(0x7f) == static_cast<FlatPtr>(0x7f7f7f7f7f7f7f7full));
 static_assert(explode_byte(0) == 0);
 
 constexpr size_t align_up_to(const size_t value, const size_t alignment)
diff --git a/AK/UnicodeUtils.h b/AK/UnicodeUtils.h
index fd55dd611d7..691ad0fb6f4 100644
--- a/AK/UnicodeUtils.h
+++ b/AK/UnicodeUtils.h
@@ -16,22 +16,22 @@ template<typename Callback>
 [[nodiscard]] constexpr int code_point_to_utf8(u32 code_point, Callback callback)
 {
     if (code_point <= 0x7f) {
-        callback((char)code_point);
+        callback(static_cast<char>(code_point));
         return 1;
     } else if (code_point <= 0x07ff) {
-        callback((char)(((code_point >> 6) & 0x1f) | 0xc0));
-        callback((char)(((code_point >> 0) & 0x3f) | 0x80));
+        callback(static_cast<char>(((code_point >> 6) & 0x1f) | 0xc0));
+        callback(static_cast<char>(((code_point >> 0) & 0x3f) | 0x80));
         return 2;
     } else if (code_point <= 0xffff) {
-        callback((char)(((code_point >> 12) & 0x0f) | 0xe0));
-        callback((char)(((code_point >> 6) & 0x3f) | 0x80));
-        callback((char)(((code_point >> 0) & 0x3f) | 0x80));
+        callback(static_cast<char>(((code_point >> 12) & 0x0f) | 0xe0));
+        callback(static_cast<char>(((code_point >> 6) & 0x3f) | 0x80));
+        callback(static_cast<char>(((code_point >> 0) & 0x3f) | 0x80));
         return 3;
     } else if (code_point <= 0x10ffff) {
-        callback((char)(((code_point >> 18) & 0x07) | 0xf0));
-        callback((char)(((code_point >> 12) & 0x3f) | 0x80));
-        callback((char)(((code_point >> 6) & 0x3f) | 0x80));
-        callback((char)(((code_point >> 0) & 0x3f) | 0x80));
+        callback(static_cast<char>(((code_point >> 18) & 0x07) | 0xf0));
+        callback(static_cast<char>(((code_point >> 12) & 0x3f) | 0x80));
+        callback(static_cast<char>(((code_point >> 6) & 0x3f) | 0x80));
+        callback(static_cast<char>(((code_point >> 0) & 0x3f) | 0x80));
         return 4;
     }
     return -1;
diff --git a/AK/Userspace.h b/AK/Userspace.h
index 62bf0d10d4e..1d4e4f36b8e 100644
--- a/AK/Userspace.h
+++ b/AK/Userspace.h
@@ -68,7 +68,7 @@ inline Userspace<T> static_ptr_cast(Userspace<U> const& ptr)
 #else
     auto casted_ptr = static_cast<T>(ptr.ptr());
 #endif
-    return Userspace<T>((FlatPtr)casted_ptr);
+    return Userspace<T>(reinterpret_cast<FlatPtr>(casted_ptr));
 }
 
 }
diff --git a/AK/Utf8View.h b/AK/Utf8View.h
index a16ae5d88ca..7b51db861cd 100644
--- a/AK/Utf8View.h
+++ b/AK/Utf8View.h
@@ -158,7 +158,7 @@ public:
 private:
     friend class Utf8CodePointIterator;
 
-    u8 const* begin_ptr() const { return (u8 const*)m_string.characters_without_null_termination(); }
+    u8 const* begin_ptr() const { return reinterpret_cast<u8 const*>(m_string.characters_without_null_termination()); }
     u8 const* end_ptr() const { return begin_ptr() + m_string.length(); }
     size_t calculate_length() const;