diff --git a/clang-tools-extra/clangd/Config.h b/clang-tools-extra/clangd/Config.h
--- a/clang-tools-extra/clangd/Config.h
+++ b/clang-tools-extra/clangd/Config.h
@@ -147,8 +147,8 @@
     bool Parameters = true;
     bool DeducedTypes = true;
     bool Designators = true;
-    // Limit the length of type names in inlay hints.
-    size_t TypeNameLimit = 32;
+    // Limit the length of type names in inlay hints. (0 means no limit)
+    uint32_t TypeNameLimit = 32;
   } InlayHints;
 };
 
diff --git a/clang-tools-extra/clangd/ConfigCompile.cpp b/clang-tools-extra/clangd/ConfigCompile.cpp
--- a/clang-tools-extra/clangd/ConfigCompile.cpp
+++ b/clang-tools-extra/clangd/ConfigCompile.cpp
@@ -614,7 +614,7 @@
     if (F.TypeNameLimit)
       Out.Apply.push_back(
           [Value(**F.TypeNameLimit)](const Params &, Config &C) {
-            C.InlayHints.TypeNameLimit = stoul(Value);
+            C.InlayHints.TypeNameLimit = Value;
           });
   }
 
diff --git a/clang-tools-extra/clangd/ConfigFragment.h b/clang-tools-extra/clangd/ConfigFragment.h
--- a/clang-tools-extra/clangd/ConfigFragment.h
+++ b/clang-tools-extra/clangd/ConfigFragment.h
@@ -322,8 +322,8 @@
     std::optional<Located<bool>> DeducedTypes;
     /// Show designators in aggregate initialization.
     std::optional<Located<bool>> Designators;
-    /// Limit the length of type name hints.
-    std::optional<Located<std::string>> TypeNameLimit;
+    /// Limit the length of type name hints. (0 means no limit)
+    std::optional<Located<uint32_t>> TypeNameLimit;
   };
   InlayHintsBlock InlayHints;
 };
diff --git a/clang-tools-extra/clangd/ConfigYAML.cpp b/clang-tools-extra/clangd/ConfigYAML.cpp
--- a/clang-tools-extra/clangd/ConfigYAML.cpp
+++ b/clang-tools-extra/clangd/ConfigYAML.cpp
@@ -255,7 +255,7 @@
         F.Designators = *Value;
     });
     Dict.handle("TypeNameLimit", [&](Node &N) {
-      if (auto Value = scalarValue(N, "TypeNameLimit"))
+      if (auto Value = uint32Value(N, "TypeNameLimit"))
         F.TypeNameLimit = *Value;
     });
     Dict.parse(N);
@@ -379,6 +379,17 @@
     return std::nullopt;
   }
 
+  std::optional<Located<uint32_t>> uint32Value(Node &N, llvm::StringRef Desc) {
+    if (auto Scalar = scalarValue(N, Desc)) {
+      unsigned long long Num;
+      if (!llvm::getAsUnsignedInteger(**Scalar, 0, Num)) {
+        return Located<uint32_t>(Num, Scalar->Range);
+      }
+    }
+    warning(Desc + " invalid number", N);
+    return std::nullopt;
+  }
+
   // Try to parse a list of single scalar values, or just a single value.
   std::optional<std::vector<Located<std::string>>> scalarValues(Node &N) {
     std::vector<Located<std::string>> Result;
diff --git a/clang-tools-extra/clangd/InlayHints.cpp b/clang-tools-extra/clangd/InlayHints.cpp
--- a/clang-tools-extra/clangd/InlayHints.cpp
+++ b/clang-tools-extra/clangd/InlayHints.cpp
@@ -688,7 +688,8 @@
       return;
 
     std::string TypeName = T.getAsString(Policy);
-    if (TypeName.length() < Cfg.InlayHints.TypeNameLimit)
+    if (Cfg.InlayHints.TypeNameLimit == 0 ||
+        TypeName.length() < Cfg.InlayHints.TypeNameLimit)
       addInlayHint(R, HintSide::Right, InlayHintKind::Type, Prefix, TypeName,
                    /*Suffix=*/"");
   }