A: Wowww, 30k columns is insanneeeeeeee. My tool is a 3rd party addon within google sheets so if google sheets can’t do it, my tool def cant haha. If it was rows, it will work, but columns are much harder to work with when its that much.

For this specific use case though, are you editing by hand or with ai.

I would recommend you ask Claude to build one for you. Just ask it for “an html interface where you can upload csvs and it will show all the columns and i can bulk delete, bulk select, search and bulk select/delete search results. And i can export at the end”

Type that prompt and it should help you build something very simple that you can then open in another browser.

Best part, you can ask it to tweak it as you wish.

I did this exact prompt maybe 5 or 6 months ago for a huge project so I know for a fact it should work.

That’s it! Give it a shot and let me know how it goes.