snaptype vs json-to-ts
json-to-ts converts JSON objects to TypeScript interfaces with minimal fuss. snaptype does the same — and adds Zod schemas, multi-source input, and a full CLI workflow.
Feature comparison
snaptype
json-to-ts
JSON → TypeScript
JSON → Zod schema
URL → TypeScript
CSV → TypeScript
OpenAPI → TypeScript
GraphQL → TypeScript
Pro
Semantic inference (email, dates, enums)
Multi-file JSON merge
Pro
Barrel generator (index.ts)
Config file (.snaptyperc)
Breaking change detection
Pro
npx / zero-install
Where snaptype wins
Choose snaptype when a one-off interface is not enough and you need a sustainable type generation workflow — see the from-json guide for a full walkthrough:
- Zod v4 schemas alongside TypeScript interfaces — runtime validation for free
- URL, CSV, OpenAPI, and GraphQL as input sources, not just local JSON files
- Semantic inference: emails → z.email(), ISO dates → z.iso.datetime(), enums auto-detected
- Barrel generator — one command creates an index.ts that re-exports all your types
- Config file (.snaptyperc) for repeatable, team-shared generation settings
- Breaking change detection (diff --ci) — fail the build when types regress
Where json-to-ts is better
json-to-ts is a solid choice for the simplest possible use case:
- Dead simple: one function call, zero config, zero learning curve — ideal for a quick one-off conversion
- Can be used as a Node.js library inside your own scripts, not just as a CLI
Try snaptype in 30 seconds
No account needed. Works with any JSON file or API endpoint.
npm install -D snaptype
npx snaptype from-json users.json -o src/types/user.ts