rioweb is a bare-bones simple, web-based, interface to the
rio R package.
rio provides a unified framework for the many data input/output
routines available in the R community. rioweb exposes it on a web app,
allowing you to convert between various file formats with a simple
upload (original) / download (converted) interface; no need to install
any software.
The app lives here; the development repository is here.
rioweb is made available in the hope that it will be useful, but without
any warranty to the extent permitted by applicable law.