How to Back Up Your Bookmarks in Chrome
To back up bookmarks in Chrome, click the Chrome menu icon at the top-right corner of your browser window and then go to Bookmarks > Bookmark Manager.
You can also quickly open the Bookmark manager by pressing Ctrl+Shift+O.
From the Bookmarks Manager, click the menu icon and then select “Export Bookmarks.”
Put your exported bookmarks in a safe place and then click “Save.”
Note: Google saves your bookmarks in HTML format. You can import them into another browser or view its contents by double-clicking the file and opening it.
How to Restore Your Bookmarks
Google Chrome has two ways to import your exported bookmarks back into the browser. They both do essentially the same thing, so for this guide, we will use the “Import Bookmarks and Settings” tool.
Click the menu icon in the top-right corner of the browser, hover over “Bookmarks,” and then click on “Import Bookmarks and Settings.”
From the drop-down menu, choose “Bookmarks HTML File” and then click “Choose File.”
From the file explorer, navigate and select the HTML file you previously exported and then click “Open.”
If you want your bookmarks to be shown in the bookmark bar, make sure to toggle on “Show Bookmarks Bar.” Click “Done.”
That’s all there is to it. After you close the dialog, all your bookmarks will be in a folder on the Bookmarks Bar—or in Bookmarks Manager if the Bookmarks Bar is disabled—labeled “Imported.”
https://www.howtogeek.com/440339/how-to-back-up-and-restore-your-chrome-bookmarks-locally/