Offline-Capable Developer Tools That Keep Your Data in Your Browser

JSON & Data Processing

Format, validate, inspect, and transform API payloads and structured content.

• JSON Formatter & Beautifier
• Mock Data Generator
• Text Diff Checker

Encoders & Decoders

Encode, decode, and inspect serialized values used in web systems.

• Encoder / Decoder
• JWT Analyzer

Generators

Create deterministic IDs, datasets, and helper values for development.

• Mock Data Generator
• UUID Generator
• Password Generator

Web & Design Utilities

Frontend helpers for colors, codes, and quick utility workflows.

• Color Converter
• QR Code Generator

Problem: API response is hard to read.

Tool: JSON Formatter

Result: Formatted, validated JSON with readable indentation.

Problem: Backend response contains invalid JSON.

Tool: JSON Repair

Result: Common syntax issues are fixed before debugging.

Problem: Need realistic test payloads for UI states.

Tool: Mock Data Generator

Result: Deterministic mock JSON, CSV, SQL, and TypeScript fixtures.

Problem: Need color conversion while building UI.

Tool: Color Converter

Result: Quick conversion between HEX, RGB, HSL, HSV, and CMYK.

Format JSON

{"env":"prod","items":[{"id":1,"role":"admin"}]}

{
  "env": "prod",
  "items": [
    {
      "id": 1,
      "role": "admin"
    }
  ]
}

Generate Mock Data

Schema: user{name,email,createdAt}

[{"name":"Ava Reed","email":"ava@example.com","createdAt":"2026-05-28T09:10:00Z"}]

Convert Color

#3B82F6

rgb(59, 130, 246) · hsl(217, 91%, 60%)