Importing bank statements in the browser: OFX, messy CSVs and duplicate detection

When I built FinControl, a personal finance app in Next.js + Supabase, the feature that took the longest wasn't the dashboard or the Stripe billing. It was "Import bank statement". It sounds simple: the user uploads a file, you create transactions. In practice, every bank exports something slightly different. Here's what I learned, with the actual... Weiterlesen: Importing bank statements in the browser: OFX, messy CSVs and duplica…