mastodon archive viewer
I kept putting off finishing it because, you know, everything sucks, but I put together a mastodon archive viewer website/tool here:
https://mastodon-viewer.muffinlabs.com/
It does the whole '100% local processing' thing, so you can specify your archive zipfile and everything is processed/stored locally. You can also use it to generate a website suitable for uploading somewhere and sharing your toots if you want.
My initial goal was to have this out in the world before botsin.space closed down, but again, the world/etc.
There's a few other tools out there that will do this for you, and a couple of them are definitely nicer looking, if not more functional than this one, but this might be the only mastodon archive viewer that does in-browser processing, offers an export, and also has the source code available. I hope folks find it useful.