Intro

It's non-obvious, but you can super-easy import downloaded footprint from huge library of EasyEda and import it into open-source KiCad ECAD.

Example Footprint

Find component that you need (on JLCPCB or LCSC) and open their model on EasyEDA (previously login into your account; note: not all components have footprint):

Then press Save -> Document (Locally). Now you have .efoo file:

Open KiCad, open Footprints Editor, press File -> Import and choose previously downloaded .efoo file:

Now you should see imported footprint, press Ctrl + S and save it in any library with appropriate name:

Be aware, because it imports some additional EasyEda information, so you can remove or move it if you don't need it:

User1	User2	User3	User.Drawings
-	Component's outline	First pin	Rotation and directions sings

It has missed F.Silk and F.Fab reference designators, so you can copy it from another footprint. Also it has missed F.Courtyard, so you need to make it manually:

After some corrections here is the final results, now it could be pushed into library:

3D body is also possible to import from EasyEDA (it's harder, but possible):

Conclusions

• Importing existing footprints much more increases design process, but be aware, because in rare cases (in my case it happened twice: MEMS and High-Current Terminal) it could be fully or patricianly incorrect, so check it before board release
• No less important is importing 3D models from the EasyEDA, see the instruction here