JSON to Mongoose Schema Converter
Convert JSON samples into Mongoose schemas instantly. Auto-detect String, Number, Boolean, Date, ObjectId refs, nested subdocuments, and arrays.
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What is JSON to Mongoose Schema Converter?
JSON to Mongoose Schema Converter generates ready-to-use Mongoose models from JSON samples. Paste an API response or MongoDB document and the tool infers field types (String, Number, Boolean, Date, ObjectId), builds subdocuments from nested objects, and emits a copy-paste schema.js for your Node.js application.
Key Benefits
- Generate valid Mongoose schema code instantly
- Automatic ObjectId ref detection for relational fields
- Nested objects and arrays become subdocuments
- Configurable model name and timestamps option
- 100% client-side, no data leaves your browser
Common Use Cases
- •Bootstrapping Mongoose models from REST API responses
- •Documenting existing MongoDB collections
- •Prototyping Node.js/Express backends quickly
- •Teaching or learning Mongoose schema design
- •Migrating JSON fixtures into typed Mongoose models
How to Convert JSON to a Mongoose Schema
- Input: Paste a JSON object or an array of objects into the input area.
- Configure: Set the model name and toggle ref detection, date detection, and timestamps.
- Generate: Click Generate schema and review the emitted Mongoose schema and inferred field types.
- Export: Copy the schema to your clipboard or download it as a .js file for your Node.js project.
Key Features
- Infer Mongoose field types from JSON samples
- Nested objects become subdocuments; arrays of objects become subdocument arrays
- Detect 24-char hex strings as ObjectId refs with model references
- ISO date strings map to Mongoose Date fields
- Configurable model name, ref detection, date detection, and timestamps
- Copy to clipboard or download as a .js file
Frequently Asked Questions
How does the tool infer Mongoose types from JSON?
It walks each field of your sample: strings stay String (unless they match an ISO date or a 24-character ObjectId hex pattern), integers and decimals become Number, booleans become Boolean, nested objects become embedded subdocuments, and arrays of objects become arrays of subdocuments.
What are ObjectId refs and when are they added?
When ref detection is on, any 24-character hexadecimal string (the shape of a MongoDB ObjectId) is emitted as Schema.Types.ObjectId with a ref to a model named after the field (for example, userId becomes a ref to User). Turn the option off to keep them as plain Strings.
Does it handle arrays of objects and mixed arrays?
Yes. Arrays of objects are merged into a single subdocument schema that unions every observed field, so optional fields still appear. Arrays of scalars become typed arrays like [String] or [Number], and empty or heterogeneous arrays fall back to Schema.Types.Mixed.
Does this tool send my data anywhere?
No. All inference and code generation happens 100% in your browser. Your JSON is never uploaded, logged, or stored.