My partner reviews a lot of P&IDs (piping and instrumentation diagrams) and the adjacent files involved (excel, docx, pdfs, acd/l5x, etc). In his company, these are usually done in Bluebeam.

It's really hard to see the diff + keep track of all the revisions resulted by these iterations. They end up storing files like "rev3_final_redlined.pdf". We've been looking for something close to Github to do these reviews, but haven't found one easy enough for folks with no CLI experience to understand and use (happy to check out more tools if you know any).

So I built withkord.com to help with revisioning and diffing binary files. Any feedback is welcome.

I really like that you implemented multiple modes and additional views for some file types. Only noticed that in XLSX "tab", switching to the PDF occasionally fails to generate PDF preview - worker reliability issue. You may think of adding some caching based on files checksum, even free Cloudflare plan R2 storage would be enough.

Great showcase for what your company does!

Wow that's really cool! Nice work