diff --git a/HISTORY.rst b/HISTORY.rst
index 36d0c4fa..94bb9be7 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -34,6 +34,7 @@ PlatformIO Core 5
     * Show package details
     * Check for conflicting names in the PlatformIO Trusted Registry
     * Check for duplicates and used version
+    * Validate package manifest
 
   - Added a new option ``--non-interactive`` to `pio package publish <https://docs.platformio.org/page/core/userguide/package/cmd_publish.html>`__ command
 
@@ -235,24 +236,24 @@ Please check `Migration guide from 4.x to 5.0 <https://docs.platformio.org/page/
 PlatformIO Core 4
 -----------------
 
-See `PlatformIO Core 4.0 history <https://docs.platformio.org/en/v4.3.4/core/history.html#platformio-core-4>`__.
+See `PlatformIO Core 4.0 history <https://github.com/platformio/platformio-core/blob/v4.3.4/HISTORY.rst>`__.
 
 PlatformIO Core 3
 -----------------
 
-See `PlatformIO Core 3.0 history <https://docs.platformio.org/en/v4.3.4/core/history.html#platformio-core-3>`__.
+See `PlatformIO Core 3.0 history <https://github.com/platformio/platformio-core/blob/v3.6.7/HISTORY.rst>`__.
 
 PlatformIO Core 2
 -----------------
 
-See `PlatformIO Core 2.0 history <https://docs.platformio.org/en/v4.3.4/core/history.html#platformio-core-2>`__.
+See `PlatformIO Core 2.0 history <https://github.com/platformio/platformio-core/blob/v2.11.2/HISTORY.rst>`__.
 
 PlatformIO Core 1
 -----------------
 
-See `PlatformIO Core 1.0 history <https://docs.platformio.org/en/v4.3.4/core/history.html#platformio-core-1>`__.
+See `PlatformIO Core 1.0 history <https://github.com/platformio/platformio-core/blob/v1.5.0/HISTORY.rst>`__.
 
 PlatformIO Core Preview
 -----------------------
 
-See `PlatformIO Core Preview history <https://docs.platformio.org/en/v4.3.4/core/history.html#platformio-core-preview>`__.
+See `PlatformIO Core Preview history <https://github.com/platformio/platformio-core/blob/v0.10.2/HISTORY.rst>`__.
diff --git a/platformio/commands/package.py b/platformio/commands/package.py
index 861de42d..1cc0cfb6 100644
--- a/platformio/commands/package.py
+++ b/platformio/commands/package.py
@@ -24,6 +24,7 @@ from platformio.clients.account import AccountClient
 from platformio.clients.registry import RegistryClient
 from platformio.exception import UserSideException
 from platformio.package.manifest.parser import ManifestParserFactory
+from platformio.package.manifest.schema import ManifestSchema, ManifestValidationError
 from platformio.package.meta import PackageSpec, PackageType
 from platformio.package.pack import PackagePacker
 from platformio.package.unpack import FileUnpacker, TARArchiver
@@ -39,6 +40,45 @@ def validate_datetime(ctx, param, value):  # pylint: disable=unused-argument
     return value
 
 
+def load_manifest_from_archive(path):
+    return ManifestSchema().load_manifest(
+        ManifestParserFactory.new_from_archive(path).as_dict()
+    )
+
+
+def check_package_duplicates(
+    owner, type, name, version
+):  # pylint: disable=redefined-builtin
+    items = (
+        RegistryClient()
+        .list_packages(filters=dict(types=[type], names=[name]))
+        .get("items")
+    )
+    if not items:
+        return True
+    # duplicated version by owner
+    if any(
+        item["owner"]["username"] == owner and item["version"]["name"] == version
+        for item in items
+    ):
+        raise UserSideException(
+            "The package `%s/%s@%s` is already published in the registry"
+            % (owner, name, version)
+        )
+    other_owners = [
+        item["owner"]["username"]
+        for item in items
+        if item["owner"]["username"] != owner
+    ]
+    if other_owners:
+        click.secho(
+            "\nWarning! A package with the name `%s` is already published by the next "
+            "owners: %s\n" % (name, ", ".join(other_owners)),
+            fg="yellow",
+        )
+    return True
+
+
 @click.group("package", short_help="Package manager")
 def cli():
     pass
@@ -57,6 +97,12 @@ def cli():
 def package_pack(package, output):
     p = PackagePacker(package)
     archive_path = p.pack(output)
+    # validate manifest
+    try:
+        load_manifest_from_archive(archive_path)
+    except ManifestValidationError as e:
+        os.remove(archive_path)
+        raise e
     click.secho('Wrote a tarball to "%s"' % archive_path, fg="green")
 
 
@@ -107,7 +153,7 @@ def package_publish(  # pylint: disable=too-many-arguments, too-many-locals
                 archive_path = p.pack()
 
         type_ = PackageType.from_archive(archive_path)
-        manifest = ManifestParserFactory.new_from_archive(archive_path).as_dict()
+        manifest = load_manifest_from_archive(archive_path)
         name = manifest.get("name")
         version = manifest.get("version")
         data = [
@@ -119,7 +165,7 @@ def package_publish(  # pylint: disable=too-many-arguments, too-many-locals
         click.echo(tabulate(data, tablefmt="plain"))
 
         # look for duplicates
-        _check_duplicates(owner, type_, name, version)
+        check_package_duplicates(owner, type_, name, version)
 
         if not non_interactive:
             click.confirm(
@@ -142,37 +188,6 @@ def package_publish(  # pylint: disable=too-many-arguments, too-many-locals
         click.secho(response.get("message"), fg="green")
 
 
-def _check_duplicates(owner, type, name, version):  # pylint: disable=redefined-builtin
-    items = (
-        RegistryClient()
-        .list_packages(filters=dict(types=[type], names=[name]))
-        .get("items")
-    )
-    if not items:
-        return True
-    # duplicated version by owner
-    if any(
-        item["owner"]["username"] == owner and item["version"]["name"] == version
-        for item in items
-    ):
-        raise UserSideException(
-            "The package `%s/%s@%s` is already published in the registry"
-            % (owner, name, version)
-        )
-    other_owners = [
-        item["owner"]["username"]
-        for item in items
-        if item["owner"]["username"] != owner
-    ]
-    if other_owners:
-        click.secho(
-            "\nWarning! A package with the name `%s` is already published by the next "
-            "owners: `%s`\n" % (name, ", ".join(other_owners)),
-            fg="yellow",
-        )
-    return True
-
-
 @cli.command("unpublish", short_help="Remove a pushed package from the registry")
 @click.argument(
     "package", required=True, metavar="[<organization>/]<pkgname>[@<version>]"