Fantasy books with strong worldbuilding and a folkloric or fairytale feel

[Aya]

Similar to Shannon Hale's Books of Bayern or Katherine Arden's Winternight trilogy

[Rainbowheart]

Dealing with Dragons

[Robert]

Spinning Silver

[SamSpayedPI]

The Lightning-Struck Heart series (but it's very NSFW!)

[jay]

THe Cruel Prince by Holly Black

[Maria]

East
The Ill-Made Mute
Keturah and Lord Death
The Ordinary Princess
Spindle's End
Dragon Slippers
Bryony and Roses

[Hannah]

I love books like this! Here are some more options.

Gods of Jade and Shadow Mexican folklore

Half a Soul more of a classic fairy story set in Victorian England

I'll second the recommendations above. Especially Spinning Silver and you should also check out Naomi Novik's other fairy-tail book Uprooted

[...cats?]

The Girl Who Circumnavigated Fairyland in a Ship of Her Own Making
Stardust
The Serpent's Shadow
Ice

[[deleted user]]

Cinder has some really amazing details.

[Gillian]

The Goblin Emperor by Katherine Addison
Spinning Silver by Naomi Novik
Princess of the Midnight Ball by Jessica Day George