diff --git a/conan/api/subapi/cache.py b/conan/api/subapi/cache.py
index 468ed14009b..d76624ccf6c 100644
--- a/conan/api/subapi/cache.py
+++ b/conan/api/subapi/cache.py
@@ -119,6 +119,7 @@ def save(self, package_list, tgz_path):
             for ref, ref_bundle in package_list.refs().items():
                 ref_layout = app.cache.recipe_layout(ref)
                 recipe_folder = os.path.relpath(ref_layout.base_folder, cache_folder)
+                recipe_folder = recipe_folder.replace("\\", "/")  # make win paths portable
                 ref_bundle["recipe_folder"] = recipe_folder
                 out.info(f"Saving {ref}: {recipe_folder}")
                 tgz.add(os.path.join(cache_folder, recipe_folder), recipe_folder, recursive=True)
@@ -126,13 +127,15 @@ def save(self, package_list, tgz_path):
                     pref_layout = app.cache.pkg_layout(pref)
                     pkg_folder = pref_layout.package()
                     folder = os.path.relpath(pkg_folder, cache_folder)
+                    folder = folder.replace("\\", "/")  # make win paths portable
                     pref_bundle["package_folder"] = folder
                     out.info(f"Saving {pref}: {folder}")
                     tgz.add(os.path.join(cache_folder, folder), folder, recursive=True)
                     if os.path.exists(pref_layout.metadata()):
                         metadata_folder = os.path.relpath(pref_layout.metadata(), cache_folder)
+                        metadata_folder = metadata_folder.replace("\\", "/")  # make paths portable
                         pref_bundle["metadata_folder"] = metadata_folder
-                        out.info(f"Saving {pref} metadata: {folder}")
+                        out.info(f"Saving {pref} metadata: {metadata_folder}")
                         tgz.add(os.path.join(cache_folder, metadata_folder), metadata_folder,
                                 recursive=True)
             serialized = json.dumps(package_list.serialize(), indent=2)
@@ -159,6 +162,7 @@ def restore(self, path):
             recipe_layout = cache.get_or_create_ref_layout(ref)
             recipe_folder = ref_bundle["recipe_folder"]
             rel_path = os.path.relpath(recipe_layout.base_folder, cache.cache_folder)
+            rel_path = rel_path.replace("\\", "/")
             assert rel_path == recipe_folder, f"{rel_path}!={recipe_folder}"
             out.info(f"Restore: {ref} in {recipe_folder}")
             for pref, pref_bundle in package_list.prefs(ref, ref_bundle).items():
diff --git a/conans/test/integration/command_v2/test_cache_save_restore.py b/conans/test/integration/command_v2/test_cache_save_restore.py
index 598c13e4fe8..587eda7297c 100644
--- a/conans/test/integration/command_v2/test_cache_save_restore.py
+++ b/conans/test/integration/command_v2/test_cache_save_restore.py
@@ -1,6 +1,7 @@
 import json
 import os
 import shutil
+import tarfile
 
 from conans.test.assets.genconanfile import GenConanfile
 from conans.test.utils.tools import TestClient
@@ -18,6 +19,16 @@ def test_cache_save_restore():
     assert os.path.exists(cache_path)
     _validate_restore(cache_path)
 
+    # Lets test that the pkglist does not contain windows backslash paths to make it portable
+    with open(cache_path, mode='rb') as file_handler:
+        the_tar = tarfile.open(fileobj=file_handler)
+        fileobj = the_tar.extractfile("pkglist.json")
+        pkglist = fileobj.read()
+        the_tar.close()
+
+    package_list = json.loads(pkglist)
+    assert "\\" not in package_list
+
 
 def test_cache_save_downloaded_restore():
     """ what happens if we save packages downloaded from server, not