A CSV viewer that respects your data

How OpenCSV handles your files

• Local-first: opening a CSV runs entirely in your browser. The file never leaves your device.
• No telemetry on file content. Ever.
• No third-party analytics or ad networks (no Google Analytics, no Facebook Pixel, no Mixpanel)
• Single httpOnly session cookie for keeping you logged in — that's the only cookie
• Cloud save is opt-in: only files you explicitly save end up on our servers
• All cloud data uses HTTPS in transit

What we do collect

Being honest matters. Here's the full list:

• Your email and a hashed password (or Google profile if you sign in with Google)
• A timestamp for when you signed up and when you last logged in
• Your subscription / payment record (handled by Stripe; we never see your card number)
• Server logs (IP + URL path) for 30 days, used only for debugging

Read our Privacy Policy

We don't bury anything legalese-deep. Our Privacy Policy is short, in plain English, and tells you exactly what we collect and why.

Why this matters

Spreadsheets are where companies leak data. Customer exports, financial summaries, employee records — they end up in shared inboxes, public Slack channels, and free online 'CSV viewers' that quietly upload everything to a third-party server. OpenCSV is built so that doesn't happen by default.