[1kurac]

In that case, what's wrong with https://sources.debian.org (other than people apparently not being aware of it)?

[cbsks]

sources.debian.org has the source for the package. apt-browse.org has the files that are installed by the package.

Compare:

https://sources.debian.org/src/htop/2.0.2-1/

https://www.apt-browse.org/browse/debian/stretch/main/amd64/...