are there any tools that can automatically export iCloud photos and import them to Google Photos?

Take a look at recipes.

@pugson the problem with ifttt is that it won't go over my old photos, only the news ones AFAI see

Ah yes, that's true. For old photos you'd have to use Google Photos app on your phone. It can import your whole library.

Oh wow, that would be great. Checking it now, thanks!

what i do is download all photos from icloud… (this download and delete photos free icloud storage) to a directory. Then use google photos sync to upload the photos ...

@z0dman - problem is that I don't have enough space to download all of them :D