diff --git a/scripts/sync-helper.js b/scripts/sync-helper.js
new file mode 100644
index 0000000000000..1590175b46281
--- /dev/null
+++ b/scripts/sync-helper.js
@@ -0,0 +1,152 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+const path = require('path');
+const fs = require('fs');
+const https = require('https');
+
+const pickKeys = [
+	'extensionTips', 'extensionImportantTips', 'keymapExtensionTips',
+	'configBasedExtensionTips', 'extensionKeywords', 'extensionAllowedBadgeProviders',
+	'extensionAllowedBadgeProvidersRegex', 'extensionAllowedProposedApi',
+	'extensionEnabledApiProposals', 'extensionKind', 'languageExtensionTips'
+];
+
+async function start() {
+	const releasePath = path.join(__dirname, '../product-release.json');
+	if (!fs.existsSync(releasePath)) {
+		console.error('product-release.json is not exists, please copy product.json from VSCode Desktop Stable');
+		return;
+	}
+	const branchProduct = JSON.parse(fs.readFileSync(path.join(__dirname, '../product.json')).toString());
+	const releaseProduct = JSON.parse(fs.readFileSync(releasePath).toString());
+	const tmpProductPath = path.join(__dirname, '../product-tmp.json');
+	for (let key of pickKeys) {
+		branchProduct[key] = releaseProduct[key];
+	}
+	fs.writeFileSync(tmpProductPath, JSON.stringify(branchProduct, null, 4));
+
+	if (keysDiff(branchProduct, releaseProduct)) {
+		// allow-any-unicode-next-line
+		console.log('📦 check if you need these keys or not');
+	}
+	await checkProductExtensions(branchProduct);
+	// allow-any-unicode-next-line
+	console.log('📦 you can copy product-tmp.json file to product.json file and resolve logs above by yourself');
+	// allow-any-unicode-next-line
+	console.log('✅ done');
+}
+
+const AllowMissKeys = [
+	'win32SetupExeBasename',
+	'darwinCredits',
+	'darwinExecutable',
+	'downloadUrl',
+	'updateUrl',
+	'webEndpointUrl',
+	'webEndpointUrlTemplate',
+	'quality',
+	'exeBasedExtensionTips',
+	'webExtensionTips',
+	'remoteExtensionTips',
+	'crashReporter',
+	'appCenter',
+	'enableTelemetry',
+	'aiConfig',
+	'msftInternalDomains',
+	'sendASmile',
+	'documentationUrl',
+	'releaseNotesUrl',
+	'keyboardShortcutsUrlMac',
+	'keyboardShortcutsUrlLinux',
+	'keyboardShortcutsUrlWin',
+	'introductoryVideosUrl',
+	'tipsAndTricksUrl',
+	'newsletterSignupUrl',
+	'twitterUrl',
+	'requestFeatureUrl',
+	'reportMarketplaceIssueUrl',
+	'privacyStatementUrl',
+	'showTelemetryOptOut',
+	'npsSurveyUrl',
+	'cesSurveyUrl',
+	'checksumFailMoreInfoUrl',
+	'electronRepository',
+	'settingsSearchUrl',
+	'surveys',
+	'tasConfig',
+	'experimentsUrl',
+	'extensionSyncedKeys',
+	'extensionVirtualWorkspacesSupport',
+	'auth',
+	'configurationSync.store',
+	'commit',
+	'date',
+	'checksums',
+	'settingsSearchBuildId',
+	'darwinUniversalAssetId',
+];
+
+function keysDiff(branch, release) {
+	const toMap = (ret, e) => {
+		ret[e] = true;
+		return ret;
+	};
+	const map1 = Object.keys(branch).reduce(toMap, {});
+	const map2 = Object.keys(release).reduce(toMap, {});
+	let changed = false;
+	for (let key in branch) {
+		if (!!!map2[key]) {
+			changed = true;
+			// allow-any-unicode-next-line
+			console.log(`🟠 Remove key: ${key}`);
+		}
+	}
+	for (let key in release) {
+		if (!!!map1[key] && !AllowMissKeys.includes(key)) {
+			changed = true;
+			// allow-any-unicode-next-line
+			console.log(`🟠 Add key: ${key}`);
+		}
+	}
+	return changed;
+}
+
+async function checkProductExtensions(product) {
+	const uniqueExtIds = new Set();
+	// Allow extension that downloaded from ms marketplace by users to use proposed api
+	// uniqueExtIds.push(...product.extensionAllowedProposedApi);
+
+	// Check recommand extension tips
+	for (let key in product.configBasedExtensionTips) {
+		Object.keys(product.configBasedExtensionTips[key].recommendations ?? {}).forEach(id => uniqueExtIds.add(id));
+	}
+	Object.keys(product.extensionImportantTips).forEach(id => uniqueExtIds.add(id));
+	Object.keys(product.extensionTips).forEach(id => uniqueExtIds.add(id));
+	Object.keys(product.extensionEnabledApiProposals).forEach(id => uniqueExtIds.add(id));
+	product.keymapExtensionTips.forEach(id => uniqueExtIds.add(id));
+	product.languageExtensionTips.forEach(id => uniqueExtIds.add(id));
+
+	// Check if extensions exists in openvsx
+	for (let id of uniqueExtIds) {
+		const openvsxUrl = `https://open-vsx.org/api/${id.replace(/\./g, '/')}`;
+		const ok = await urlExists(openvsxUrl);
+		if (!ok) {
+			// allow-any-unicode-next-line
+			console.error(`🔴 Extension not exists: ${id}`);
+		}
+	}
+}
+
+async function urlExists(url) {
+	return new Promise((resolve, reject) => {
+		https.get(url, res => {
+			resolve(res.statusCode === 200);
+		}).on('error', error => {
+			reject(error);
+		});
+	});
+}
+
+start().then().catch(console.error);