Discord Embeds от JohnyTheCarrot

Instead of appending query arguments to your exposed URLs and repeatedly posting them to Discord to test how their embed system will render your site's embed, you can use this open-source tool to preview what it will look like in Discord without having to expose your site to the public.

All of the work is done locally, no information is sent elsewhere. The only requests made are CDN requests for imagery.
Contributions are always welcome.