Hi Product Hunt 👋 I build client-side web tools, and Parsefy started from a habit I kept catching myself in: pasting an API response into whatever "JSON to CSV" site ranked first on Google, without really knowing where that payload was going. Fine for dummy data. Not fine for a client's production export. So Parsefy does the conversion entirely in your browser tab. No upload step, no server, no account. Once the page loads you can go offline and it still works — you can verify it in the network panel. A few things I spent most of the time on: Nested objects flatten into dot-notation columns (user.address.city), or you can split repeated arrays into related tables with a _parent_id link Records with different keys merge into a union header instead of silently dropping fields Output is RFC 4180 CSV, so Excel and Sheets read it correctly — and there's a real .xlsx export when encoding gets messy There are also CSV→JSON, JSONL, TSV and markdown-table converters (that last one is for cleaning up AI chat output). It's free and I'm not planning a paid tier. What I'd love feedback on: which format pair should I add next?

Parsefy

JSON, CSV and Excel converters that never upload your data

JSON, CSV and Excel converters that never upload your data