Mendeley Web allows you to access your saved research on the go (depending on how much of your data you decide to sync) and collect citations while browsing online databases.
The Web application also excels at creating citations while you are actively doing research by allowing you to use the Web Importer (the "Import To Mendeley" button installed in your browser’s bookmarks bar) to capture the citation of the article currently displayed in your browser.
Getting the "Import to Mendeley" Bookmarklet
Import citations using the Web Importer tool
After you install the Web Importer in your browser's bookmark, it will remain there. You can use it while when you are on a page with multiple search results or on a page describing a single item.
On a search results page:
On the page of a single item:
Import some PDFs using the Web Importer tool
While the Web Importer tends to grab most citations well, it is very hit or miss on also ingesting the PDF.
A page on Mendeley’s website lists the Journal databases that Mendeley can extract PDFs from, but results have been varied even with these databases. It is recommended that you plan on doing PDF import from the desktop application.
Other features that are similar to the desktop application:
A free Mendeley account provides you with 500MB of space for your personal library documents and 500 MB for documents you share with other people. (You can purchase more space.) Because of this limitation, you may choose not to sync all the documents from your Mendeley Desktop to your Mendeley Web account.
These settings are controlled in the Mendeley Desktop application.
There is a Sync Library button in the Mendeley Desktop that will collect changes made in Mendeley Web and send changes to Mendeley Web.
Turning Syncing on and off can be done at the level of All Documents or per Folder/Collection. An Edit Settings button is visible when either All Documents or a Folder/Collection is selected; this allows you to toggle syncrhonization on and off.