openweightOpen Data Format for Strength Training

Your training data belongs to you, not to any one app

📋

JSON Schema Spec

A clean, well-documented schema for workouts, templates, programs, and personal records. Human-readable and machine-validatable.

🔧

TypeScript (npm) and Kotlin (Maven Central) SDKs for parsing, validating, and serializing workout data. Integrate in minutes.

🔄

Export from one app, import to another. No vendor lock-in, no proprietary formats.