Google Chrome automatically creates a backup of your bookmarks each time you launch Chrome from a closed state. This is a lesser known feature, and it can save your butt if you ever accidentally delete a bookmark or even worse, a group of bookmarks.
Accidents happen. The delete key is easy to hit. And unlike Internet Explorer, deleted Chrome bookmarks don’t go to the recycle bin –- they get permanently erased on the spot. The only chance of recovery is a backup, so unless you regularly export / backup your bookmarks, the automated backup is your best bet. The only side affect, is that any new bookmarks you’ve created since launching Chrome will also be lost unless you back them up right away.
If you’ve just accidentally deleted a bookmark, whatever you do, don’t close and re-open Chrome. You will lose your backup file. You need to swap the automated backup file first. It’s located at the following location in Windows 7.
Find the file named Bookmarks and Bookmarks.bak. In order to see the .bak extension, you’ll need to have File Extensions set to Visible. The plain Bookmarks file is your current set, including the accidental deletion. You don’t want it. But before you do anything, it’s a good idea to completely exit Chrome.
Right click on the Google Chrome icon from the taskbar and select Close all windows.
Be careful that you do not re-open Google Chrome yet. Doing so will overwrite the backup file.
Head back to your default folder and delete the (current) plain Bookmarks file. Then, rename Bookmarks.bak and remove the .bak extension so it matches up with the name of the file you just deleted.
In the end result, you’ll have one Bookmarks file in your default folder; the one that used to be Bookmarks.bak.
Restart Chrome. The accident will have been reversed and your bookmarks will now be back to normal. Enjoy!