TechLagoon develops web services that are available free of charge.
You don't need to register to use this site,
so I hope you'll feel free to use it.
I would appreciate if you could send me some requests,
questions and suggestions.
Web application "DataChef" is a collection of online tools for image and video conversion.
This is a collection of single and simple functions, for example, a page to invert colors, a page to detect edges of images, a page to convert video clips to loop seamlessly, and so on.
DataChef is 100% free to use and there is no need to install or register.
All you have to do is upload a file and download the converted file.
So it's very easy to use.