My biggest concern with an online service is privacy (either bad actors or the web app getting hacked). I used an online mortgage service that was fully paperless with the exception of a single document. Just ran it through a few imagemagick commands to add rotation, noise, contrast, etc. My home printer wasn't working so it was either that or buy a whole new one.
paulgb|3 years ago
In this case it's all run client-side. You're still trusting that the code you're served wasn't maliciously replaced, but if you want to be careful you could run it in an incognito tab and temporarily disable your internet connection.
krossitalk|3 years ago
Let's presume it is malicious, and the mere act of downloading the WASM starts an injection.