Perspective is an open-source data grid, pivot table and charting component for large, real-time and streaming datasets. Build user-configurable reports, dashboards, notebooks and embedded analytics applications, backed by a high-performance streaming query engine that runs in-browser via WebAssembly or server-side in Python, Node.js and Rust — or delegates to a database you already have.
Features
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A data-reactive UI packaged as a Custom Element, with drag-and-drop query and layout configuration. Includes a virtual-scrolling, editable data grid, WebGL charting engine with 15+ chart types, tile-based geographic maps, full theme support, and React bindings.
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A fast, memory-efficient streaming query engine written in C++ and compiled for WebAssembly (including a 64-bit
memory64build for in-browser datasets larger than 4GB, and support for paging columns to disk via OPFS in the browser or memory-mapped files natively), Python and Rust. Tables update incrementally and views tick in real time, with reactive joins across tables, a columnar expression language based on ExprTK, and read/write/streaming support for Apache Arrow, CSV and JSON. -
A symmetric client/server architecture — the same Client API connects to an engine in-process, in a Web Worker, or remotely over WebSocket, with server bindings for Python (aiohttp, Starlette, Tornado), Node.js and Rust. Datasets can be mirrored to the browser for fluid interaction or virtualized server-side, streaming only what's visible.
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Virtual servers that run Perspective's UI directly on external engines like DuckDB, ClickHouse, PostgreSQL and Polars, translating view configurations into native queries — no ETL or data copy required.
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A Jupyter widget built on anywidget and a Python client library for interactive data analysis in JupyterLab and other notebook environments.
Documentation
- Project Site
- User Guide
- JavaScript API
- Python API
- Rust API
Examples
| Superstore | Workspace | Webcam |
| Raycasting | Market | NYPD |
| Movies | Evictions | Fractal |
Media
@timkpaine |
@timbess |
@sc1f |
@texodus |
@texodus |
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The Perspective project is a member of the The OpenJS Foundation.
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