CSV to JSON Converter

CSV Data

Or Upload a CSV File

Delimiter First row is header Beautify JSON

Rows: 0 Columns: 0 Size: 0 B

JSON Output

Enter CSV data and click Convert

📦 CSV to JSON Converter Source Code $4.99

Get the complete, ready‑to‑deploy HTML file with all styling and logic. This is the exact code powering the demo above — no dependencies, works offline, and 100% client‑side. Handles quoted fields, embedded commas, escaped quotes, and mixed delimiters correctly. Perfect for integrating into your own projects. One‑time purchase, lifetime access.

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What Is a CSV to JSON Converter?

This utility transforms comma‑separated values (CSV) data into structured JSON format. CSV is widely used for data exchange between spreadsheets and databases, while JSON is the native format for modern APIs and web applications.[reference:0] The converter handles quoted fields, embedded commas, escaped quotes, and mixed delimiters correctly using a state‑machine parser that follows RFC 4180.[reference:1] Everything runs in your browser — no data is ever sent to a server.[reference:2]

How to Use

Enter your CSV data by pasting it into the text area or uploading a .csv file.
Choose your delimiter — the tool auto‑detects comma, semicolon, tab, or pipe, or you can set it manually.
Toggle options — decide if the first row contains column headers (keys) and whether to beautify the JSON output.
Click "Convert" — the JSON result appears instantly. Copy it to your clipboard or download it as a .json file.

Frequently Asked Questions

Does this tool handle quoted fields with embedded commas?

Yes. The parser uses a state‑machine that tracks whether it's inside quoted fields, so values like "Smith, John" are treated as a single field.[reference:3]

Is my CSV data uploaded to a server?

No. All processing happens entirely in your browser using the File API and a custom parser. Nothing is ever sent over the network.[reference:4][reference:5]

What happens if my CSV doesn't have headers?

Toggle the "First row is header" option off. The tool will generate generic keys like field0, field1, etc., for each column.[reference:6]

Disclaimer: This tool performs all operations locally in your browser. No data is stored, transmitted, or logged. You are responsible for ensuring you have the rights to convert any data you process.