[](https://www.diigo.com "Diigo Home")
* [Downloads](https://www.diigo.com/tools)
* [Blog](http://blog.diigo.com/)
* [Sign in](https://www.diigo.com/sign-in?referInfo=https%3A%2F%2Fwww.diigo.com)
* [Sign up](https://www.diigo.com/sign-up)
* [Downloads](https://www.diigo.com/tools)
* [Blog](http://blog.diigo.com/)
* [Sign in](https://www.diigo.com/sign-in?referInfo=https%3A%2F%2Fwww.diigo.com)
* [Sign up](https://www.diigo.com/sign-up)
Diigo
Your Learning, Simplified
[
Install Extension
](https://chrome.google.com/webstore/detail/pnhplgjpclknigjpccbcnmicgcieojbh)
Collect
Save and tag your online resources for easy access anytime, anywhere
Annotate
Annotate web pages and PDFs directly as you browse online
Organize
Organize your links, references and personal input to create a structured research base through Outliner
Share
Share your research with friends, classmates, colleagues or associates
Diigo at a glance
* Bookmarks
Still the easiest way to collect the sites you want to get back to later.
* Tags
Tag your collected web pages with relevant terms for easy future retrieval
* Personal Library
Your complete online knowledge collection, all in one place.
* Highlights
Highlight text directly on any web page for personal reference or collaboration.
* Sticky Notes
Add text, comments or reminders directly on any web page with sticky notes.
* Outliner
Structure your research by automated streamlining through Diigo or by your own personal customization.
* Groups
Share your research with colleagues, classmates and friends through our collaborative platform for knowledge sharing.
* Archived Web Pages
Store your online resources with annotations intact forever, regardless of whether the original source is still active. (Premium Feature)
9 million + users are already using Diigo.
Try it free Now!
[
Install Extension
](https://chrome.google.com/webstore/detail/pnhplgjpclknigjpccbcnmicgcieojbh)
* [](https://www.facebook.com/diigosoftware)
* [](https://twitter.com/diigo)
* [](http://diigoblr.tumblr.com/)
* [](http://blog.diigo.com)
©2025 Diigo, Inc.
* [About](https://www.diigo.com/about)
* [Pricing & Plans](https://www.diigo.com/premium)
* [Terms of Service](https://www.diigo.com/terms)
* [Privacy Policy](https://www.diigo.com/privacy)
* [Contact Us](https://www.diigo.com/common/contact)