Dev.to
6/25/2026

Compute astrology charts in the browser: no node-gyp, no .se1 files, no AGPL
Short summary
XALEN Ephemeris is a new Rust/WASM library for computing astrology charts in the browser, directly solving three Swiss Ephemeris pain points: eliminating node-gyp build dependencies, offering native WASM support for client-side computation, and bundling ephemeris data to zero external files. Licensed Apache-2.0 (versus AGPL-3.0), it's purpose-built for serverless backends and browser-based charts. Currently at 0.3.1 stage and not yet on npm, so it's a watch-and-prototype story rather than production-ready today.
- •XALEN Ephemeris solves three Swiss Ephemeris pain points: no build dependencies, native WASM, zero data files
- •Apache-2.0 licensed vs AGPL-3.0, designed for serverless and client-side computation
- •Currently 0.3.1 (not npm-ready); monitor for production use
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