Hi Everyone,
I announce that my online converter is alive. I used ImageMagick to make it run, you can find the image conversion in english on this page :
http://www.files-conversion.com/image-converter.php
For other languages, you can find an access from that page easily.
It is nearly free of ads and it is free of charge, I hope you will enjoy it.
Feel free to link to my website if you have a blog or a website.
Thank you everyone and don't hesitate to send me your comments!