XPR Language

Appearance

XPRCross-language expression language

Safe, sandboxed expression evaluation for data pipelines — in JavaScript, Python, and Go.

Get Started
View Spec
GitHub

Safe & Sandboxed

No side effects, no prototype access, configurable timeout and depth limits.

Cross-language

One spec, multiple runtimes — JavaScript, Python, and Go share the same conformance tests.

Zero Dependencies

The JavaScript runtime ships with zero runtime dependencies. Pure expression evaluation.