diff --git a/clang-tools-extra/clangd/CMakeLists.txt b/clang-tools-extra/clangd/CMakeLists.txt
--- a/clang-tools-extra/clangd/CMakeLists.txt
+++ b/clang-tools-extra/clangd/CMakeLists.txt
@@ -22,12 +22,19 @@
 # -DCLANG_TIDY_CHECKS=Off avoids a dependency on clang-tidy, reducing rebuilds.
 option(CLANGD_TIDY_CHECKS "Link all clang-tidy checks into clangd" ON)
 
+if ("${LLVM_VERSION_SUFFIX}" STREQUAL "git")
+  set(CLANGD_PRE_RELEASE ON)
+else()
+  set(CLANGD_PRE_RELEASE OFF)
+endif()
+
 llvm_canonicalize_cmake_booleans(
   CLANGD_BUILD_XPC
   CLANGD_ENABLE_REMOTE
   ENABLE_GRPC_REFLECTION
   CLANGD_MALLOC_TRIM
   CLANGD_TIDY_CHECKS
+  CLANGD_PRE_RELEASE
   LLVM_ENABLE_ZLIB
 )
 
diff --git a/clang-tools-extra/clangd/Diagnostics.cpp b/clang-tools-extra/clangd/Diagnostics.cpp
--- a/clang-tools-extra/clangd/Diagnostics.cpp
+++ b/clang-tools-extra/clangd/Diagnostics.cpp
@@ -9,6 +9,7 @@
 #include "Diagnostics.h"
 #include "../clang-tidy/ClangTidyDiagnosticConsumer.h"
 #include "Compiler.h"
+#include "Feature.h"
 #include "Protocol.h"
 #include "SourceCode.h"
 #include "support/Logger.h"
@@ -17,6 +18,7 @@
 #include "clang/Basic/DiagnosticIDs.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Basic/SourceManager.h"
+#include "clang/Basic/Version.h"
 #include "clang/Lex/Lexer.h"
 #include "clang/Lex/Token.h"
 #include "llvm/ADT/ArrayRef.h"
@@ -918,9 +920,31 @@
     // information to be worth linking.
     // https://clang.llvm.org/docs/DiagnosticsReference.html
     break;
-  case Diag::ClangTidy:
-    return {("https://clang.llvm.org/extra/clang-tidy/checks/" + Name + ".html")
-                .str()};
+  case Diag::ClangTidy: {
+    StringRef Module, Check;
+    // This won't correctly get the module for clang-analyzer checks, but as we
+    // don't link in the analyzer that shouldn't be an issue.
+    // This would also need updating if anyone decides to create a module with a
+    // '-' in the name.
+    std::tie(Module, Check) = Name.split('-');
+    if (Module.empty() || Check.empty())
+      return llvm::None;
+#if CLANGD_PRE_RELEASE
+    return ("https://clang.llvm.org/extra/clang-tidy/checks/" + Module + "/" +
+            Check + ".html")
+        .str();
+#else
+#define XSTRINGIFY(X) STRINGIFY(X)
+#define STRINGIFY(X) #X
+    return ("https://releases.llvm.org/" XSTRINGIFY(
+                CLANG_VERSION_MAJOR) ".0.0/tools/clang/tools/extra/docs/"
+                                     "clang-tidy/checks/" +
+            Module + "/" + Check + ".html")
+        .str();
+#undef STRINGIFY
+#undef XSTRINGIFY
+#endif
+  }
   case Diag::Clangd:
     if (Name == "unused-includes")
       return {"https://clangd.llvm.org/guides/include-cleaner"};
diff --git a/clang-tools-extra/clangd/Features.inc.in b/clang-tools-extra/clangd/Features.inc.in
--- a/clang-tools-extra/clangd/Features.inc.in
+++ b/clang-tools-extra/clangd/Features.inc.in
@@ -4,3 +4,4 @@
 #define ENABLE_GRPC_REFLECTION @ENABLE_GRPC_REFLECTION@
 #define CLANGD_MALLOC_TRIM @CLANGD_MALLOC_TRIM@
 #define CLANGD_TIDY_CHECKS @CLANGD_TIDY_CHECKS@
+#define CLANGD_PRE_RELEASE @CLANGD_PRE_RELEASE@
diff --git a/clang-tools-extra/clangd/test/diagnostics-tidy.test b/clang-tools-extra/clangd/test/diagnostics-tidy.test
--- a/clang-tools-extra/clangd/test/diagnostics-tidy.test
+++ b/clang-tools-extra/clangd/test/diagnostics-tidy.test
@@ -1,4 +1,5 @@
 # REQUIRES: clangd-tidy-checks
+# REQUIRES: clangd-pre-release
 # RUN: clangd -lit-test -clang-tidy-checks=bugprone-sizeof-expression < %s | FileCheck -strict-whitespace %s
 {"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{},"trace":"off"}}
 ---
@@ -9,7 +10,7 @@
 # CHECK-NEXT:      {
 # CHECK-NEXT:        "code": "bugprone-sizeof-expression",
 # CHECK-NEXT:        "codeDescription": {
-# CHECK-NEXT:          "href": "https://clang.llvm.org/extra/clang-tidy/checks/bugprone-sizeof-expression.html"
+# CHECK-NEXT:          "href": "https://clang.llvm.org/extra/clang-tidy/checks/bugprone/sizeof-expression.html"
 # CHECK-NEXT:        },
 # CHECK-NEXT:        "message": "Suspicious usage of 'sizeof(K)'; did you mean 'K'?",
 # CHECK-NEXT:        "range": {
diff --git a/clang-tools-extra/clangd/test/lit.cfg.py b/clang-tools-extra/clangd/test/lit.cfg.py
--- a/clang-tools-extra/clangd/test/lit.cfg.py
+++ b/clang-tools-extra/clangd/test/lit.cfg.py
@@ -34,5 +34,8 @@
 if config.clangd_tidy_checks:
   config.available_features.add('clangd-tidy-checks')
 
+if config.clangd_pre_release:
+  config.available_features.add('clangd-pre-release')
+
 if config.have_zlib:
   config.available_features.add('zlib')
diff --git a/clang-tools-extra/clangd/test/lit.site.cfg.py.in b/clang-tools-extra/clangd/test/lit.site.cfg.py.in
--- a/clang-tools-extra/clangd/test/lit.site.cfg.py.in
+++ b/clang-tools-extra/clangd/test/lit.site.cfg.py.in
@@ -16,6 +16,7 @@
 config.clangd_build_xpc = @CLANGD_BUILD_XPC@
 config.clangd_enable_remote = @CLANGD_ENABLE_REMOTE@
 config.clangd_tidy_checks = @CLANGD_TIDY_CHECKS@
+config.clangd_pre_release = @CLANGD_PRE_RELEASE@
 config.have_zlib = @LLVM_ENABLE_ZLIB@
 
 # Delegate logic to lit.cfg.py.