The fileconverterto has an amazing speed because everything in going on front-end meaning is that you have no need to upload your file on server. Everything will done into your browser.
Having an awesome speed of file conversion and also no need to uploading your data, no doubt these key points make this app very easy to use and also user-friendly.
The whole process is going on into your own browser meaning is that your files are Almost downloaded and when you click on downlaod button you will be surprised with the speed.