Synkmark is your bridge for keeping bookmarks in sync among Safari, Firefox, Opera, Vivaldi and Google Chrome. Synkmark can also keep your bookmarks alphabetized as you prefer, verified and free of duplicates. Synkmark is compatible with iCloud Safari, Firefox Sync, Opera Sync and Sign in to Chrome, so that if you use these apps on your iOS or Android device, you can have organized bookmarks on all of your devices. (Ours are the only non-Apple apps which can modify Safari bookmarks without corrupting iCloud data.) Download Synkmark to start your free trial. Synkmark is a member of the BookMacster family of apps, based on the same proven technology, but with a simplified user interface focused on syncing Firefox, Opera, Vivaldi and Google Chrome For other apps and pricing options, see the Bookmarks Manager Selection Guide on our site. One Synkmark license covers all the Macs used by one person.