Easy Secure protects Excel, Word and PowerPoint files on Windows with Windows Hello. Right-click a file and choose Protect with this PC: the file gets a strong password, and from then on a double-click opens it after a Windows Hello check (face, fingerprint or PIN) instead of a typed password.
So that a reset Windows Hello or a new PC never locks you out, every file password is backed up before the file is locked, to a hidden app folder in your own Google Drive (and to your 1Password too, if you use it). Easy Secure has no server of its own.
Easy Secure is in early testing (alpha).