[thealistra]

Bro no one will use a web service and trust it is 100% private. This is an unprovable claim. Maybe it is private now, but you sell this in 5 years and it stops being so.

Maybe a JavaScript ad jailbreaks an iframe and reads this.

There is no beating a locally running program

[subhash_k]

Agreed the feeling of pasting code to external website always feels insecure. But it doesn't mean locally running programs are safe either.

Atleast in website like this you can disable network access and work in offline mode and get the confident.