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CSV ↔ JSON

Convert data tables between flat comma-separated values (CSV) and nested JSON object arrays.

Interactive Online Utility

CSV ↔ JSON runs 100% locally in your browser sandbox with zero network roundtrips. Load or paste your code directly into the workspace above to format, parse, validate, or generate your output instantly. 

name,role,level
Alice,Architect,Senior
Bob,Frontend,Lead
PRO TIP Local Client-Side Processing

Otuls runs 100% locally in your browser. Your data is processed in-memory and never transmitted over external network connections.

Technical Guide & Overview

CSV ↔ JSON is a dedicated developer utility designed to streamline common workflow tasks with zero installation, instant execution, and complete data privacy.

How It Works Under the Hood

The tool leverages modern browser standards (HTML5, WebAssembly, WebGL, and modern ECMAScript) to execute complex computations directly on your local device CPU and GPU without offloading processing to third-party cloud servers.

Authoritative Specifications & Primary Standards

Official specifications, RFCs, and authoritative open-source repositories for CSV ↔ JSON:

IETF RFC

The official internet specification defining Comma-Separated Values syntax.

GitHub Repository

The standard open-source in-browser and Node.js CSV parsing library.

Zero-Knowledge Client-Side Sandboxing

Privacy First: This tool operates completely inside your browser with zero remote logging or tracking.