By using Emojis instead of text to label your bookmarks, you can fit more of them in, and you can easily identify them by sight.
How to label bookmarks with emoji
Creating Emoji labels is as easy as using emoji in any text field. In Safari, tap (or click, on Mac) the bookmarks button up next to the URL bar. This will open the bookmarks sidebar. Navigate to the Favorites folder. The Favorites folder is the one used to populate the bookmarks bar.
Tap the Favorites folder to open it, and then tap Edit. Then, tap whichever bookmark you want to label with emojis. In the edit screen, you just use the emoji keyboard to add the symbols of your choice, instead of using plain old text. When you’re done, tap the little back arrow to return to the favorites folder, and tap Done. Look up! Your bookmark now has a fancy emoji label.
I use this to relabel my bookmarklets that force YouTube videos to play full-screen or picture-in-picture on my iPad. I find it easier to hit them in the narrow Favorites bar when I can see them clearly.
Try it. And remember, any changes you make will sync between all your other iDevices.