▸ left becomes right ◂

rfjs

Utilities, playgrounds, and developer data tools for JSON, objects, filters, and query workflows. Data in one shape, out another — that transformation is the whole site.

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input ▸json

{
  "user": {
    "name": "Ada",
    "roles": ["admin", "dev"]
  },
  "active": true
}

4 nested keys

▸ outputjson

{
  "user.name": "Ada",
  "user.roles.0": "admin",
  "user.roles.1": "dev",
  "active": true
}

4 flat keys

input → flatten() → output — a static specimen of @rfjs/object-utils.

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Package Showcase

Every tool is a live demo of an @rfjs/* package.

Data Tools

Flatten, convert, decode — all in your browser.

Templates

Scaffold TypeScript projects with start-ts-by.

Packages

The @rfjs/* toolkit — each one a single data gesture.

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@rfjs/data-filter

Filter in-memory data with JSONPath-addressed conditions.

@rfjs/data-transform

Data type transformation utilities (string/number/boolean/date).

@rfjs/jwt

JWT sign/verify/decode helper.

@rfjs/mongo-query

MongoDB query builder from filter metadata.

@rfjs/object-utils

Object manipulation utilities (flatten, paths, merge).

@rfjs/pg-toolkit

PostgreSQL admin utilities (seed history, DB/schema creation).