diff --git a/tools/generate-permission-doc.php b/tools/generate-permission-doc.php
new file mode 100644
index 000000000..57fd04626
--- /dev/null
+++ b/tools/generate-permission-doc.php
@@ -0,0 +1,100 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+declare(strict_types=1);
+
+namespace pocketmine\generate_permission_doc;
+
+use pocketmine\permission\DefaultPermissions;
+use pocketmine\permission\PermissionManager;
+use pocketmine\utils\AssumptionFailedError;
+use pocketmine\VersionInfo;
+use Webmozart\PathUtil\Path;
+use function count;
+use function dirname;
+use function fclose;
+use function fopen;
+use function fwrite;
+use function getcwd;
+use function ksort;
+use function str_replace;
+use function strtolower;
+use const SORT_STRING;
+use const STDERR;
+
+require dirname(__DIR__) . '/vendor/autoload.php';
+
+function markdownify(string $name) : string{
+	return str_replace(['.', '`', ' '], ['', '', '-'], strtolower($name));
+}
+DefaultPermissions::registerCorePermissions();
+
+$cwd = getcwd();
+if($cwd === false){
+	throw new AssumptionFailedError("getcwd() returned false");
+}
+$output = Path::join($cwd, "core-permissions.md");
+echo "Writing output to $output\n";
+$doc = fopen($output, "wb");
+if($doc === false){
+	fwrite(STDERR, "Failed to open output file\n");
+	exit(1);
+}
+
+$permissions = PermissionManager::getInstance()->getPermissions();
+ksort($permissions, SORT_STRING);
+
+fwrite($doc, "# PocketMine-MP Core Permissions\n");
+fwrite($doc, "Generated from PocketMine-MP " . VersionInfo::VERSION()->getFullVersion() . "\n");
+fwrite($doc, "\n");
+fwrite($doc, "| Name | Description | Implied permissions |\n");
+fwrite($doc, "|:-----|:------------|:-------------------:|\n");
+foreach($permissions as $permission){
+	$link = count($permission->getChildren()) === 0 ? "N/A" : "[Jump](#" . markdownify("Permissions implied by `" . $permission->getName() . "`") . ")";
+	fwrite($doc, "| `" . $permission->getName() . "` | " . $permission->getDescription() . " | $link |\n");
+}
+
+fwrite($doc, "\n\n");
+fwrite($doc, "## Implied permissions\n");
+fwrite($doc, "Some permissions automatically grant (or deny) other permissions by default when granted. These are referred to as **implied permissions**.<br>\n");
+fwrite($doc, "Permissions may imply permissions which in turn imply other permissions (e.g. `pocketmine.group.operator` implies `pocketmine.group.user`, which in turn implies `pocketmine.command.help`).<br>\n");
+fwrite($doc, "Implied permissions can be overridden by explicit permissions from elsewhere.<br>\n");
+fwrite($doc, "**Note:** When explicitly denied, implied permissions are inverted. This means that \"granted\" becomes \"denied\" and vice versa.\n");
+fwrite($doc, "\n\n");
+foreach($permissions as $permission){
+	if(count($permission->getChildren()) === 0){
+		continue;
+	}
+	fwrite($doc, "### Permissions implied by `" . $permission->getName() . "`\n");
+	fwrite($doc, "Users granted this permission will also be granted/denied the following permissions implicitly:\n\n");
+
+	fwrite($doc, "| Name | Type |\n");
+	fwrite($doc, "|:-----|:----:|\n");
+	$children = $permission->getChildren();
+	ksort($children, SORT_STRING);
+	foreach($children as $childName => $isGranted){
+		fwrite($doc, "| `$childName` | " . ($isGranted ? "Granted" : "Denied") . " |\n");
+	}
+	fwrite($doc, "\n");
+}
+
+fclose($doc);
+echo "Done.\n";