What is missing?
This started as a handful of image converters and grew because the same formats kept coming up. If the thing you need is not here, say so.
Send it
This opens GitHub with the message already written, so you only have to press submit. It needs a GitHub account, which is the honest downside of not running a server. Everything sent this way is public, so leave personal details out.
Already on the list
Ask for one of these and it moves up.
Or build it yourself
Every tool here is open source and runs in the browser, so there is no backend to set up and no key to get. Adding a conversion is one line in a list. The README explains where everything lives.
Open the repository