http://xmr.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/opsec/steghide/index.html
As mentioned above, the cover image must be larger than the file you wish to embed, as a rule of thumb your coverfile should be 20 times larger . (Hint: you can split larger files with tools like tar or 7z into smaller fragments to embed into a whole collection of cover files.) We can check how many bytes steghide can embed by using steghide info _file_ .