MongoDB Validator

The MongoDB Validator tool enables precise design of collection validators using JSON Schema rules. It supports required fields, type constraints, nested objects, arrays, and string patterns, with a dry-run feature to predict which sample documents would fail before applying rules. Users can generate MongoDB commands for db.createCollection or collMod that implement the jsonSchema rule. The tool is aimed at database engineers, developers, and data architects who need predictable data shapes and proactive data quality controls. Unique value lies in pre-deployment validation, versioned rule exports, and explicit failure paths to guide schema improvements. Use cases include introducing new collections with strict schemas, evolving existing validators during refactors, and ensuring compliance with data governance standards. Core features include a guided JSON Schema builder, dry-run validation against sample_docs, and exportable validator snippets compatible with MongoDB servers. This approach reduces live-database risk and accelerates safe schema rollouts.