Contact
Write to hello@gifdiet.com. Replies usually take a day or two.
Reporting a problem
If a conversion failed, the following details make it far easier to fix: the file type you started from, the output format you chose, the browser and operating system you were using, and the exact text of any error message shown next to the file. A sample file helps most of all, if it is not private.
Requesting a format
Most formats supported by FFmpeg can be added. Tell us what you are converting from and to, and what you are trying to accomplish, since there is often a better route than the one people first ask for.
Operator
GIF Diet is operated by Samuel Hoffman, Presov, Slovakia. Correspondence in English or Slovak is equally welcome.