Does this tool support semicolons, tabs, or custom delimiters?

Yes. Modifyle automatically detects whether your input uses commas, semicolons, tabs (TSV), or pipes. You can also explicitly lock the delimiter using the dropdown selector.

How does type detection work for numbers and booleans?

When 'Auto-detect numbers & booleans' is active, cells containing numeric values are cast to JavaScript numbers, 'true'/'false' are converted to native booleans, and 'null' becomes null. If unchecked, all values remain exact raw strings.

Are there row or file size limits for conversion?

Because conversion takes place on your local machine using fast string processing, you can convert datasets with tens of thousands of rows without hitting proxy gateway limits.

Developer Tools / CSV to JSON

CSV to JSON Converter

Convert comma, semicolon, or tab-delimited CSV spreadsheets into clean JSON arrays with automatic type detection (numbers, booleans, and nulls).

Delimiter:

Auto-detect numbers & booleans

Upload CSV

Columns: 5Rows: 4 recordsOutput: 4 JSON objects

CSV Spreadsheet Input200 chars

JSON Output Array

[
  {
    "id": 1,
    "name": "Sarah Jenkins",
    "role": "Software Architect",
    "salary": 145000,
    "active": true
  },
  {
    "id": 2,
    "name": "David Chen",
    "role": "Data Scientist",
    "salary": 132000,
    "active": true
  },
  {
    "id": 3,
    "name": "Elena Rostova",
    "role": "UI/UX Designer",
    "salary": 118000,
    "active": false
  },
  {
    "id": 4,
    "name": "Marcus Vance",
    "role": "DevOps Engineer",
    "salary": 138000,
    "active": true
  }
]

Privacy: 100% Client-Side (Zero network uploads)

Sealed Browser Processing

Free Browser-Based CSV to JSON Transformation Tool

Converting tabular data into structured JSON arrays for web applications

CSV (Comma-Separated Values) remains the standard export format for business spreadsheets, SQL query results, and reporting dashboards. However, frontend web applications, mobile apps, and NoSQL databases like MongoDB require structured JSON objects.

Modifyle converts CSV data into standardized JSON arrays with zero latency. The first row of your CSV is parsed as object keys, and each subsequent line becomes a corresponding key-value map.

With client-side execution, you can convert sensitive payroll sheets, customer contact lists, or analytics dumps without violating data protection standards or transmitting files across the internet.

How It Works in 3 Simple Steps

Provide CSV Data

Paste CSV text directly or upload an existing .csv or .tsv file.

Configure Options

Choose your delimiter or keep Auto Detect enabled, and toggle numeric type casting.

Export JSON

Copy the formatted JSON array with 1-click or download a .json file.

Why choose Modifyle CSV to JSON Converter?

100% Client-Side Execution (Zero file upload to external servers)

No file size or page count limits imposed by server queues

Completely free with no credit card, registration, or software install

Full privacy compliance: documents stay sealed inside your local browser memory

Install Modifyle as a Desktop & Mobile App

Launch PDF, image, and QR tools in 1 click right from your home screen or dock. 100% private, client-side, with instant offline access.

Related Workshop Tools

Frequently paired utilities

JSON to CSV

Convert JSON arrays back into tabular CSV spreadsheets.

CSV Viewer

Filter, search, and paginate through CSV datasets.

JSON Formatter

Format, beautify, and minify raw JSON documents.

JSON Validator

Detect syntax errors with exact line and column locations.