The best file encryption?
Hands down Cryptomator has to be the best and easiest way to encrypt and access your files, locally or from the cloud. Supports all devices. (Windows, Linux, macOS, Android, iOS)
Hat.sh is as they call it, "Simple, fast, secure client-side file encryption". You can encrypt/decrypt files online using only your browser. You can even use PGP keys to encypt/decrypt files. If you don't have keys you can easily generate some all built in.