diff --git a/aqt/archives.py b/aqt/archives.py
index 5bef0f92..8d1cc730 100644
--- a/aqt/archives.py
+++ b/aqt/archives.py
@@ -367,7 +367,7 @@ def _get_archives(self):
     def _append_depends_tool(self, arch, tool_name):
         os_target_folder = posixpath.join(
             "online/qtsdkrepository",
-            self.os_name + ("_x86" if self.os_name == "windows" else ("" if self.os_name == "linux_arm64" else "_x64")),
+            self.os_name + ("_x86" if self.os_name == "windows" else ("" if self.os_name == "linux_arm64" or self.target == "wasm" else "_x64")),
             self.target,
             tool_name,
         )
diff --git a/aqt/installer.py b/aqt/installer.py
index d290af8f..c208090b 100644
--- a/aqt/installer.py
+++ b/aqt/installer.py
@@ -747,12 +747,12 @@ def _set_install_qt_parser(self, install_qt_parser, *, is_legacy: bool):
 
     def _set_install_tool_parser(self, install_tool_parser, *, is_legacy: bool):
         install_tool_parser.set_defaults(func=self.run_install_tool, is_legacy=is_legacy)
-        install_tool_parser.add_argument("host", choices=["linux", "linux_arm64", "mac", "windows"], help="host os name")
+        install_tool_parser.add_argument("host", choices=["linux", "linux_arm64", "mac", "windows", "all_os"], help="host os name")
         if not is_legacy:
             install_tool_parser.add_argument(
                 "target",
                 default=None,
-                choices=["desktop", "winrt", "android", "ios"],
+                choices=["wasm", "desktop", "winrt", "android", "ios"],
                 help="Target SDK.",
             )
         install_tool_parser.add_argument("tool_name", help="Name of tool such as tools_ifw, tools_mingw")
@@ -1027,13 +1027,13 @@ def _set_common_arguments(self, subparser, *, is_legacy: bool, is_target_depreca
         if is_target_deprecated:
             subparser.add_argument(
                 "target",
-                choices=["desktop", "winrt", "android", "ios"],
+                choices=["desktop", "winrt", "android", "ios", "wasm"],
                 nargs="?",
                 help="Ignored. This parameter is deprecated and marked for removal in a future release. "
                 "It is present here for backwards compatibility.",
             )
         else:
-            subparser.add_argument("target", choices=["desktop", "winrt", "android", "ios"], help="target sdk")
+            subparser.add_argument("target", choices=["desktop", "winrt", "android", "ios", "wasm"], help="target sdk")
         if not is_legacy:
             subparser.add_argument(
                 "qt_version_spec",
@@ -1102,7 +1102,7 @@ def _get_autodesktop_dir_and_arch(
             self.logger.info(f"Found installed {host}-desktop Qt at {installed_desktop_arch_dir}")
             return installed_desktop_arch_dir.name, None
 
-        default_desktop_arch = MetadataFactory(ArchiveId("qt", host, "desktop")).fetch_default_desktop_arch(version, is_msvc)
+        default_desktop_arch = MetadataFactory(ArchiveId("qt", host, "desktop")).fetch_default_desktop_arch(version, is_msvc, is_wasm)
         desktop_arch_dir = QtRepoProperty.get_arch_dir_name(host, default_desktop_arch, version)
         expected_desktop_arch_path = base_path / dir_for_version(version) / desktop_arch_dir
 
diff --git a/aqt/metadata.py b/aqt/metadata.py
index a06e94bc..8da196c3 100644
--- a/aqt/metadata.py
+++ b/aqt/metadata.py
@@ -940,9 +940,9 @@ def describe_filters(self) -> str:
             return str(self.archive_id)
         return "{} with spec {}".format(self.archive_id, self.spec)
 
-    def fetch_default_desktop_arch(self, version: Version, is_msvc: bool = False) -> str:
+    def fetch_default_desktop_arch(self, version: Version, is_msvc: bool = False, is_wasm: bool = False) -> str:
         assert self.archive_id.target == "desktop", "This function is meant to fetch desktop architectures"
-        if self.archive_id.host == "linux":
+        if self.archive_id.host == "linux" or is_wasm:
             if version >= Version("6.7.0"):
                 return "linux_gcc_64"
             else: