Bookmark manager finder21 best Bookmark OS alternatives in 2021

Bookmark OS is a bookmark manager with the following features: tags, drag and drop, importing/exporting, automated backups, tab management, folder icons, folder colors, folder suggestions, folder sharing, time filters, keyboard shortcuts, starring/favoriting, web page screenshots, bookmark icons/images, mobile and tablet support, file uploads, to-do lists, standalone notes, duplicate resolver, dark mode.

Here are some great alternatives.

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A collaborative bookmark and content manager, because browser bookmarks just aren't good enough. Has a number of different layouts: list mode, Pinterest cards, and grid view.
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Save your bookmarks in a visual card-based fashion similar to Pinterest. Has social sharing features built in.
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Clipix is like a cross between a start page and Pinterest. The layout is very similar to Pinterest but you can bookmark more than just images.
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Deskyo lets you save, import, classify, manage, access and find your bookmarks very quickly. It is meant to look like your desktop and has icons and folders.
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ChannelKit is a way to organize your bookmarks, notes, images, and contacts in a visual card-like layout. You can create different "channels" which are like categories for better organization.
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Klart is self-titled, "Bookmarking for Designers" and lets you save screenshots of any website and organize them as bigger cards in a grid with tags.
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Collect.io is an open sourced bookmark manager that will let you save your bookmark info on the backup option of your choice. It is still in development.
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Sqworl is a visual bookmark manager that uses screenshots as large icons in a grid. It is geared towards educators.
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GGather is a bookmark manager with a great UI. It allows you to view your bookmarks as lists, grids, or Pinterest-like cards.
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Openoox uses a card-like layout for managing your bookmarks and is available on desktop, mobile, and tablet.
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Bookmax is an online bookmark manager that offers a list view and folder tree that is similar to Mac and Windows.
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Raindrop.io is a bookmark manager that behaves as a single page app. It allows you to drag and drop, change icons, and sort your bookmarks.
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Hypershoot captures full page screenshots of the web pages that user's bookmark and organizes them in a grid.
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Dropmark is a visual way to organize links and is optimized for designers. It also has team collaboration features.
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Moodboard is an open source visual bookmark manager. You can clone the repository on Github and host it on your own website.
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Bookmarkme is another visual way to organize your bookmarks using a card-like manner. It also supports tags, collaboration, and reminders.
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Clipd.io is essentially a moodboard for bookmarks that supports tags and full text search.
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Prism uses large web page screenshots as bookmarks and allows for users to collaborate.
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Bublup allows you to save bookmarks, files, and notes in folders with pictures on them. Bublup also has folder sharing and collaboration.
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Bkmark gives you a nice layout for organizing your bookmarks with multiple layout options.
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Collect allows you to organize links and images visually into boards. Has sharing and collaboration.