Here is the source code. The version #[1] linked is the standalone html with a couple less features. Works fine, but less assistance to load your relays from your browser extension or kind 10002 events.
#[2]
The Nostr Event Deletion tool I posted a week ago now supports loading relays from your browser extension and kind 10002 events. The only catch is now you need to run it locally - as ported it to svelte, and I don’t know how to compile a single html file.
Full source code available for both versions. 
https://github.com/blakejakopovic/nostr_delete
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