Welcome!
This website helps you manage your collection of LEGO bricks primarily in terms of complete sets:
When you want to build something custom, this website will suggest you to take out some of the parts from each relevant set, and save the particular lists of used parts, so that later eventually you can easily put the parts back into the box that they came from in the exact correct quantities.
Please check out the video introduction of the website. Then:
This website's development is in an alpha stage. During heavy ongoing development, I'll probably keep resetting the data that is stored here. But don't worry, the data that you have on Rebrickable is not affected at all.
For future plans, you can refer to the video below.
It is near-mandatory to install the browser extension that augments rebrickable.com with additional export features.
You can skip it, but then you will have to export each setlist, partlist, customlist and MOC one by one and then also upload them to the website one by one.
Install from Chrome Web Store Install extension for Firefox
See my post on Rebrickable forums for the initial history of this userscript.
For all questions and suggestions, please use GitHub Issues.
Timestamps: