Here's the other one I know of that has some degree of trust (non browser based also available) https://pteo.paranoiaworks.mobi/en/ https://pteo.paranoiaworks.

Here's the other one I know of that has some degree of trust (non browser based also available) https://pteo.paranoiaworks.mobi/en/ https://pteo.paranoiaworks.mobi/en/ It says it is client side you could also download the page with what and open the html file for added assurance