Query large local files with industry-grade SQL — without uploading anything.
Utilora SQL Explorer brings the power of DuckDB directly into your browser using WebAssembly. This means you get a full analytical database engine running locally — no servers, no data leaving your device, and no installation required.
Why This Tool Exists
Data professionals waste a lot of time importing files into Excel, Python, or cloud databases just for quick exploration. SQL Explorer eliminates that friction.
Key Features
- Full DuckDB SQL support (Joins, Window functions, CTEs, aggregations, etc.)
- Native support for CSV, Parquet, JSONL, and JSON
- Multiple file joins in one session
- Fast even on large files (100MB+)
- Export query results as CSV
- 100% client-side & private
Real-World Use Cases
- Data Analysts — Quickly explore exported reports from Stripe, Shopify, or GA4
- Engineers — Validate data quality before pushing to warehouses
- Students & Learners — Practice SQL on real-world datasets
- Product Managers — Analyze CSVs from internal tools without asking engineering
- Freelancers — Work with client data while maintaining privacy
How to Use SQL Explorer
- Go to SQL Explorer
- Drag and drop one or more CSV, Parquet, or JSONL files
- Wait for the files to load (usually very fast)
- Write your SQL in the editor (auto-complete available)
- Run the query and explore results in the table below
- Export results if needed
Comparison
| Feature | Utilora SQL Explorer | Excel / Google Sheets | Python + Pandas | Online SQL Tools |
|---|---|---|---|---|
| No Data Upload | Yes | Yes | Yes (local) | No |
| Full SQL Support | Excellent | Limited | Excellent | Good |
| Parquet Support | Yes | No | Yes | Rare |
| Zero Installation | Yes | Yes | No | Yes |
| Privacy Level | 100% Local | Local | Local | Low |
| Speed on Large Files | Very Fast | Slow | Fast | Varies |
Frequently Asked Questions
Q: How large can the files be?
A: Performance is excellent up to several hundred MBs. Very large files (1GB+) may be slow but still workable.
Q: Is my data safe?
A: Yes. Everything runs in your browser. No data is sent to any server.
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