🦆 Duck Tools

Join CSV/Excel Files Instantly - 100% Private

Your data never leaves your computer. Drag files, write SQL, get insights - all offline with enterprise-level analytics.

🔒 No Upload 🌐 Works Offline ⚡ Instant Results
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Preparing Your Private Analytics Environment

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✓ No data uploaded to servers
✓ Full SQL engine in your browser
✓ Enterprise-grade performance

1 Drop Your Files (Stay Local)

CSV, Excel - any size. Processed instantly on your computer.

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Drop CSV/Excel files here or click to browse Files processed locally on your computer - never uploaded
.csv .xlsx Up to 50MB

2 Write SQL Queries

Full SQL power - JOINs, window functions, everything you need.

Tables: t1, t2, t3... • Full SQL support including JOINs
Ctrl+Enter

3 Get Instant Results

Instant analytics. Export when ready.