[sobel]

The encrypted result of this tool contains all the code necessary to decrypt itself (in a web browser).

I'm not too familiar with GnuPG, so I don't know if that's different.

[cbhl]

I'm reminded of those self-decrypting .exe archives that WinZip used to produce back in the day...

[selter01]

Any browser?

[sobel]

Tested and working with recent Chrome, Firefox, Opera, Safari 6.1+, IE 10+. https://www.passwordprotectmyfile.com/faq.

It uses, among others, the Blob API so will not work on older browsers.