Schema Labs
About Schema Labs

Small tools. Clear contracts.

An independent developer project focused on one practical problem: understanding what changes when a data contract evolves.

The project

Schema Labs is building browser-local tools for engineers who work with JSON data contracts. The public developer preview combines JSON Schema validation with a conservative revision checker in a single workspace.

The project is maintained by Thanh Hưng Nguyễn. The website, documentation and contact address use the same domain: schemalabs.co.uk.

What is available today

  • JSON Schema validation using Ajv.
  • Structural revision review with explicit severity labels.
  • Local JSON file input and downloadable check reports.
  • A browser worker that processes documents without sending them to a service.

This is an early developer preview, not a hosted enterprise platform. Account management, team workspaces and managed CI integrations are not offered in this release.

Development direction

Our development plan is to use Claude Code for implementation support, test coverage, and review of edge cases. The next product work is clearer migration explanations and better handling of advanced schema composition.

Development tooling is not a runtime dependency. The current playground makes no Claude API calls. A future AI-assisted workflow would be opt-in, separately documented, and introduced only after cost and data handling are settled.

Contact the maintainer

Product questions and feedback: founder@schemalabs.co.uk.

For the most useful feedback, include the schema dialect, an anonymized example and the result you expected. Small, reproducible cases help us improve the checks.