As I gather, Exiftool is used a bunch by OSINT researchers, many who aren't big fans of the CLI, so I figured this would be a fun browser port. The above + https://github.com/bjorn3/browser_wasi_shim and some regular Svelte/file API stuff were enough, pretty proud of this demo.
Thinking if I get some more time this weekend I may implement metadata editing / deleting, and bundling these into desktop apps would not be super tricky.