diff --git a/Kernel/KBufferBuilder.cpp b/Kernel/KBufferBuilder.cpp
new file mode 100644
index 0000000000..a214f78e33
--- /dev/null
+++ b/Kernel/KBufferBuilder.cpp
@@ -0,0 +1,66 @@
+#include <AK/PrintfImplementation.h>
+#include <AK/StdLibExtras.h>
+#include <KBufferBuilder.h>
+#include <stdarg.h>
+
+inline bool KBufferBuilder::can_append(size_t size) const
+{
+    bool has_space = ((m_size + size) < m_buffer.size());
+    ASSERT(has_space);
+    return has_space;
+}
+
+KBuffer KBufferBuilder::build()
+{
+    m_buffer.set_size(m_size);
+    return m_buffer;
+}
+
+KBufferBuilder::KBufferBuilder()
+    : m_buffer(KBuffer::create_with_size(1048576))
+{
+}
+
+void KBufferBuilder::append(const StringView& str)
+{
+    if (str.is_empty())
+        return;
+    if (!can_append(str.length()))
+        return;
+    memcpy(insertion_ptr(), str.characters_without_null_termination(), str.length());
+    m_size += str.length();
+}
+
+void KBufferBuilder::append(const char* characters, int length)
+{
+    if (!length)
+        return;
+    if (!can_append(length))
+        return;
+    memcpy(insertion_ptr() + m_size, characters, length);
+    m_size += length;
+}
+
+void KBufferBuilder::append(char ch)
+{
+    if (!can_append(1))
+        return;
+    insertion_ptr()[0] = ch;
+    m_size += 1;
+}
+
+void KBufferBuilder::appendvf(const char* fmt, va_list ap)
+{
+    printf_internal([this](char*&, char ch) {
+        append(ch);
+    },
+        nullptr, fmt, ap);
+}
+
+void KBufferBuilder::appendf(const char* fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    appendvf(fmt, ap);
+    va_end(ap);
+}
diff --git a/Kernel/KBufferBuilder.h b/Kernel/KBufferBuilder.h
new file mode 100644
index 0000000000..88d6affb71
--- /dev/null
+++ b/Kernel/KBufferBuilder.h
@@ -0,0 +1,28 @@
+#pragma once
+
+#include <AK/AKString.h>
+#include <Kernel/KBuffer.h>
+#include <stdarg.h>
+
+class KBufferBuilder {
+public:
+    using OutputType = KBuffer;
+
+    explicit KBufferBuilder();
+    ~KBufferBuilder() {}
+
+    void append(const StringView&);
+    void append(char);
+    void append(const char*, int);
+    void appendf(const char*, ...);
+    void appendvf(const char*, va_list);
+
+    KBuffer build();
+
+private:
+    bool can_append(size_t) const;
+    u8* insertion_ptr() { return m_buffer.data() + m_size; }
+
+    KBuffer m_buffer;
+    size_t m_size { 0 };
+};
diff --git a/Kernel/Makefile b/Kernel/Makefile
index d81a2008df..22b8d466f1 100644
--- a/Kernel/Makefile
+++ b/Kernel/Makefile
@@ -36,6 +36,7 @@ KERNEL_OBJS = \
        FileSystem/FIFO.o \
        Scheduler.o \
        DoubleBuffer.o \
+       KBufferBuilder.o \
        KSyms.o \
        KParams.o \
        FileSystem/SharedMemory.o \