BookMacster is a bookmarks manager for your Mac which plays nicely with iCloud Safari syncing, Firefox Sync, Sign In to Chrome, and Opera Sync. (Ours are the only non-Apple apps which can modify Safari bookmarks without corrupting iCloud data.) It can be used in one of three ways, or all three:

• Manage Browser Bookmarks. Add alphabetizing and tagging. Verify, fix dupes, consolidate.
• Cross-Browser Syncing. Sync bookmarks of Firefox, Chrome, Opera and more among all your devices.
• Directly. Keep your bookmarks in one central store, accessible within web browsers.

Features

• Compatible with iCloud Safari syncing, Firefox Sync, Google Chrome's Sign In. Bookmarks added to these apps on your Mac will show up in these apps on iOS or Andriod devices.
• Import/export with Safari, Firefox, Chrome, Opera, Vivaldi, iCab, Pinboard, Diigo, and OmniWeb.
• Easily organize with tags, hierarchy, or both.
• Verifies bookmarks, fixes redirects, duplicates, can upgrade insecure bookmarks and remove URL cruft.
• Sort (alphabetize) automatically when bookmarks are changed. You control which folders you want to be sorted or not sorted, how to sort them.
• Supports multiple user profiles in Firefox and Google Chrome.
• Scriptable to collect new bookmarks from NetNewsWire or similar apps.