diff --git a/AK/StringBuilder.cpp b/AK/StringBuilder.cpp
index 2574d023433..8a697f8ebcb 100644
--- a/AK/StringBuilder.cpp
+++ b/AK/StringBuilder.cpp
@@ -148,9 +148,6 @@ void StringBuilder::append_escaped_for_json(StringView const& string)
 {
     for (auto ch : string) {
         switch (ch) {
-        case '\e':
-            append("\\u001B");
-            break;
         case '\b':
             append("\\b");
             break;
@@ -167,7 +164,10 @@ void StringBuilder::append_escaped_for_json(StringView const& string)
             append("\\\\");
             break;
         default:
-            append(ch);
+            if (ch >= 0 && ch <= 0x1f)
+                append(String::formatted("\\u{:04x}", ch));
+            else
+                append(ch);
         }
     }
 }
diff --git a/Kernel/KBufferBuilder.cpp b/Kernel/KBufferBuilder.cpp
index a484888263e..4a2f9d1da06 100644
--- a/Kernel/KBufferBuilder.cpp
+++ b/Kernel/KBufferBuilder.cpp
@@ -101,9 +101,6 @@ KResult KBufferBuilder::append_escaped_for_json(const StringView& string)
 {
     for (auto ch : string) {
         switch (ch) {
-        case '\e':
-            TRY(append("\\u001B"));
-            break;
         case '\b':
             TRY(append("\\b"));
             break;
@@ -120,7 +117,10 @@ KResult KBufferBuilder::append_escaped_for_json(const StringView& string)
             TRY(append("\\\\"));
             break;
         default:
-            TRY(append(ch));
+            if (ch >= 0 && ch <= 0x1f)
+                TRY(append(String::formatted("\\u{:04x}", ch)));
+            else
+                TRY(append(ch));
         }
     }
     return KSuccess;