CSV to JSON Converter

Transform spreadsheet data into structured JSON objects instantly. 100% Client-Side. Zero tracking.

Raw CSV Input

JSON Output

Rows Parsed: 0 Output Size: 0 Bytes

🔒 PRIVACY NOTE: Your files are processed entirely within your web browser. We do not upload, store, or share your data with any servers. 100% secure and private.

How it works

A simple, smart, and completely secure local conversion tool.

Input Data

Paste your CSV text or select the File Upload mode to drag and drop a .csv file directly.

Configure Options

Choose to parse numbers automatically or minify the JSON output to save space.

Copy or Download

Click copy or download to grab your structured JSON array. Everything runs locally in your browser.

The Difference

CSV vs. JSON

CSV is a flat file format used by Excel. It is highly space-efficient but lacks hierarchy. JSON supports nested data and native data types (like booleans and numbers), making it the standard standard language of the web APIs.

Security First

Why convert locally?

CSV files frequently contain highly sensitive information like customer emails, financial records, or user databases. File Gulp processes your CSV entirely inside your browser memory using JavaScript, ensuring zero data exposure to external servers.

How our parser works

Keys (Headers): The parser strictly treats the first row of your CSV as the JSON Keys.
Arrays of Objects: Each subsequent row is converted into a separate JSON object within a master array.
Smart Parsing: If checked, string values like "123" or "true" are automatically cast to their native JSON types (Numbers and Booleans).
Quote Handling: Correctly handles internal commas inside double-quoted fields, matching standard CSV specs.