,earlier another website namely Torrific.com provided this option and its unavailable at present.There is another website Bitlet.org which also provides the same facility but here I prefer Zbigz.com.
The method in detail is given below step by step:
1.Browse and download the desired torrent file from any torrent sites such as Torrentz.eu or Isohunt.com or any other site
2.Then Go to www.zbigz.com,you can find two options there one to paste the torrent link and the other to upload the torrent file
3.Then click on upload torrent file option.And upload the torrent file that you saved to your computer in the first step
4.Then click on the 'Go' button and select the option to continue as free user.
5.Wait a while until they create a cache of the torrent file
6.Then click on the 'Zip torrent' option which will be found on the right side after the cache has been created.
7.After the zipping process is complete,click on the same button (i.e 'Zip' button)
8.Select the option to continue as a free user and download the torrent file with high speed using Internet Download Manager (IDM) or any other download manager(accelerator)This process is working fine for me and I use it to download torrent files using IDM with high speed.Its a simple process just try by yourself and If you still have any doubt comment it below.