Is there a way to turn `.mca` files into a human readable format? Is there a way to replace all of a certain block or item in a `.mca` file?

I would like to replace all instances of a modded block with a vanilla block. I plan on updating my Minecraft java modded world into a newer version, but the newer versions of a mod removes some blocks and items.

I would also like to replace items in inventories and storage and biomes too.

I tried opening `.mca` files in a text editor, but that just gave me a bunch of symbols. Where do I get started? Are those files zipped or something?