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Q: Is my CSV data secure when I use this tool?

Yes, completely. All conversion happens locally in your browser. Your CSV data is never uploaded to any server, stored, or shared.

Q: What file formats are supported besides CSV?

We support CSV, TSV (tab-separated values), and any custom delimiter text files including pipe (|) and semicolon (;) formats.

Q: How do I convert an Excel file to JSON?

Export your Excel file as CSV first (File → Save As → CSV), then upload to our converter to get JSON output.

The fastest free CSV to JSON converter online. Paste or drag your CSV file, configure options, and get clean JSON in seconds. All processing happens in your browser — your data stays private.

Convert CSV to JSON Now Step-by-Step Guide

10MB

Max file size

100%

Private & secure

Free

No limits

CSV to JSON Converter

Paste your CSV data, upload a file, or drag and drop. Configure settings and get your JSON output instantly.

Conversion Settings

Delimiter

Output Format

Key Field (for Object format)

Parse Numbers

Parse Booleans

Skip Empty Lines

Trim Whitespace

Pretty Print JSON

CSV Input

Drop CSV file here or click to browse
Supports .csv, .tsv, .txt — up to 10MB

JSON Output

Why Use Our CSV to JSON Converter?

Built for developers, analysts, and anyone who works with data — fast, private, and packed with features.

Instant Conversion

Convert CSV to JSON in milliseconds directly in your browser. No server uploads, no waiting.

100% Private

Your CSV data never leaves your device. All processing is client-side — nothing is stored or sent to any server.

Multiple Formats

Output as JSON arrays, keyed objects, or nested structures. Supports comma, semicolon, tab, pipe delimiters.

Smart Parsing

Auto-detects delimiters, parses numbers and booleans, handles quoted fields and special characters correctly.

Perfect For:

Developers

Feed JSON into APIs, databases, and web apps from CSV exports.

Data Analysts

Transform spreadsheet data into JSON for analysis tools and dashboards.

Students

Learn data formats and conversion with a simple, educational tool.

Businesses

Migrate data and integrate systems using reliable CSV-to-JSON conversion.

Designers

Convert design data exports into JSON for Figma plugins and prototypes.

Advanced Features

Professional-grade CSV to JSON conversion with every option you need for any data transformation task.

Lightning Fast Processing

Handle CSV files up to 10MB with real-time conversion. Get your JSON output in under a second, every time.

Browser-Side Security

Every conversion runs locally in your browser. Sensitive CSV data never leaves your machine or touches any server.

Auto Delimiter Detection

Automatically detects commas, semicolons, tabs, pipes, and spaces. Override manually when needed.

Mobile Responsive

Fully responsive on desktop, tablet, and mobile. Convert CSV to JSON wherever you are.

Download or Copy JSON

Copy JSON to clipboard or download as a .json file. Supports pretty-printed and minified output.

Transpose & Transform

Transpose rows and columns before conversion. Auto-parse numbers and booleans for clean, typed JSON.

How to Convert CSV to JSON

Three simple steps to transform your CSV data into valid JSON format.

Upload or Paste Your CSV

Drag and drop a CSV file into the upload area, click to browse, or paste your CSV data directly into the input box. Supports .csv, .tsv, and .txt files.

Configure Conversion Settings

Choose your delimiter (auto-detected by default), output format (array, object, or nested), and parsing options. Enable pretty print for readable JSON.

Copy or Download Your JSON

Click "Convert to JSON" or let auto-convert do the work. Copy the JSON output to your clipboard or download it as a .json file for your project.

Read the Full CSV to JSON Tutorial →

Frequently Asked Questions

Everything you need to know about converting CSV to JSON.

What is the maximum CSV file size supported?

Our converter handles CSV files up to 10MB in size. For larger files, we recommend splitting them into smaller chunks. All processing happens in your browser, so performance depends on your device as well.

Is my CSV data secure when I use this tool?

Yes, completely. All conversion processing happens locally in your browser using JavaScript. Your CSV data is never uploaded to any server, stored, or shared. You can even use the tool offline after the page loads.

What file formats are supported besides CSV?

We support CSV (comma-separated), TSV (tab-separated values), and any custom delimiter text files including pipe-separated (|) and semicolon-separated (;) formats. You can also specify a custom delimiter manually.

How do I convert an Excel file to JSON?

Export your Excel file as CSV first: in Excel or Google Sheets, go to File → Save As (or Download As) → CSV. Then upload that CSV file to our converter to get your JSON output. Read our full CSV to JSON conversion guide for step-by-step instructions.

What is the difference between array and object output formats?

Array format creates a JSON array where each CSV row becomes an object — the most common format for APIs and databases. Object format uses a specified column as keys, useful for lookups. Nested format creates hierarchical JSON structures based on your column data.

Does the converter handle CSV files with special characters?

Yes. Our parser handles UTF-8 encoded files with special characters, quoted fields containing commas, escaped quotes, and newlines inside field values. Enable "Trim Whitespace" for best results with data that has extra spaces.

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