DataLens was created to solve a fundamental problem developers face every day: inspecting and converting structured data quickly without giving away sensitive API payloads or customer CSVs to unknown cloud servers.
DataLens parses all data inside your local browser thread using Web Workers. Your JSON and CSV files never leave your computer.
No unpredictable AI hallucinations. DataLens uses strict type inference, RFC 4180 CSV parsing, and unroll algorithms.
Designed with keyboard shortcuts, dot-notation column unrolling, and instant Markdown table export for documentation.
We maintain no databases of uploaded files. When you close your browser tab, your data vanishes.
Expanding arrays or flattening columns never modifies your raw source dataset.
Instant page load, no mandatory login walls, and no paywalls for basic data inspection features.
Works smoothly on desktop, tablet, and mobile browsers with virtualized table rendering.