Hello ProductHunt! TLDR: HelloCSV is an open source, free, Flatfile alternative We're a software shop and almost every project we work on inevitably needs a CSV importer, which all share the same set of problems: - How do you make sure that data uploaded is correct - How do you notify the user that the data is incorrect before they upload it, and give the user a chance to fix it - Incorrect or duplicate data that is uploaded is super annoying to try to fix after-the-fact - Run automatic formatters (ex: phone number formatting), but providing a way for the user to see what our formatter did before uploading as a sanity check So we built a tool that we've been using internally for a few months now, and just polished it up and open sourced it. It's basically a drop in CSV importer that: - Supports custom columns - with custom validations - and custom transformations - and a nice UI that walks a user through a 4 step process of uploading a CSV (upload, map columns, preview data, upload confirmation) Some of the things we really tried to achieve for was: - Be able to use this for non-React / SPA projects - Keep bundle size small (99kb was as small as I was able to make it, really tried hard!) - 100% frontend, unlike alternatives like FlatFile / OneSchema that send data to remote servers. - 100% free & open source - The stack is as minimal & stable as we could make it. Preact for a tiny, stable reactive renderer + TanStack datatables for the preview. Demo: https://hellocsv.github.io/Hello... Code: https://github.com/HelloCSV/Hell...

Chris Zhu

Canine

Maker

📌