Hey everyone,
As a developer, I frequently need to flatten nested JSON exports and API responses into CSV format for analysis. Almost every free online tool I found uploads raw JSON data to backend servers for processing.
If you are handling customer data, API keys, or internal logs, that's a security risk.
I built DataFlex Studio (https://dataflexstudio.vercel.app) using Next.js and Web Workers.
How it works:
• Runs 100% inside your browser using background threads.
• Handles recursive unwrapping of deeply nested arrays and objects.
• Zero server uploads—your data never leaves your tab.
I added a 1-click "Load Sample API Payload" button on the page so you can test parsing speed instantly without needing your own JSON file.
I'm looking for feedback on edge cases or memory bottlenecks with large files (10MB+). I also launched a limited $15 Lifetime Pass for early adopters who want ad-free batch processing.
Would love your thoughts!
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