What CSV formats are supported?

We support standard CSV with comma, semicolon, tab, or pipe delimiters. The first row is treated as headers by default. You can also paste data directly from Excel.

How are data types handled?

Numbers are automatically converted to JSON numbers, "true"/"false" become booleans, and empty values become null. You can disable this to keep everything as strings.

Can I upload Excel files directly?

Currently we support CSV format. To convert Excel, save your spreadsheet as CSV first (File > Save As > CSV), then upload or paste the content here.

Yes! All conversion happens locally in your browser. Your data never leaves your device or gets uploaded to any server.

Free CSV to JSON Converter

New

Convert CSV or Excel data to JSON format instantly. Paste data or upload a file.

Delimiter:

First row is headers

Parse data types

Minify output

CSV Input

Paste CSV data or upload a file

0 rows

JSON Output

How to Convert CSV to JSON

This tool converts CSV (Comma-Separated Values) data into JSON format. Simply paste your CSV data or upload a file, and get properly formatted JSON instantly. Perfect for:

Converting spreadsheet data for web applications
Preparing data for APIs and databases
Transforming Excel exports to JSON format
Data migration and integration tasks

Frequently Asked Questions

Common questions about CSV to JSON Converter.

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What this tool does

Parse delimited records into JSON for an import or API fixture.

How to use it

Choose the delimiter and whether the first row contains headers. Paste CSV and inspect the resulting records.

Worked example

With headers enabled, name,city followed by Ada,London creates a record with name Ada and city London.

Limitations and checks

Review duplicate or empty headers, quoted fields and uneven rows. Numeric-looking identifiers may need to remain strings. CSV conversion does not validate a business schema.

How your data is processed

The operation runs in your browser. Copy and download actions use your device. Where Save work is offered, a local copy is stored; eligible work can sync only under your enabled account settings. See Privacy for site analytics and storage details.

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