MBTiles offline viewer
MapTiler can also serve as a tool to open offline mbtiles file. Double click on any mbtiles file and you will immediately see the content.
When you close the preview, it is possible to directly upload such map to a webhosting, like Amazon s3 or Google Storage.
With TileServer-php you can host any MBTiles also on your own server. See TileServer-php tutorial.