This is just a quick app that I put together for uploading temporary files up to 1 gigabyte for free. The files expire after 24 hours.
https://tempfile.cloud
It took about 3 hours to get this up and running, my design skills are quite limited, so that was the most time-consuming part.
It is built on Aurelia, uses Node.js as the backend and Amazon S3 for the file storage.
While this is nothing new, more sites like these are always welcome. If you plan on keeping this alive long term, please consider making an API so I can use it from the command line. Also, these services tend to get misused a lot, so you might want to log everything. Maybe encourage people to encrypt before uploading, too.
Take a look at a few existing services as well, to figure out what else you can add.
[1] https://file.io [2] https://transfer.sh
Just got done writing a script for the latter - https://gist.github.com/Prajjwal/63f5df1176ea05ee3679c04e0fa....