Free CSV to JSON Converter
Convert CSV to JSON instantly — paste or upload a file, get a formatted JSON result, and download it.
Drop your CSV file here
or click to browse
How to convert
- 1
Upload your CSV file by dragging it onto the drop zone, or paste your CSV data into the text area.
- 2
Choose your preferred JSON indentation (2 or 4 spaces).
- 3
Click the Convert button to generate formatted JSON output.
- 4
Copy the result to your clipboard or click Download to save the .json file.
Features
- 100% private — data never leaves your browser
- No file uploads to any server
- No signup or account required
- Free with no usage limits
- Configurable indentation (2 or 4 spaces)
- Instant conversion results
- Full UTF-8 and special character support
- Works on any device with a modern browser
What is JSON?
JSON (JavaScript Object Notation) is a lightweight data interchange format widely used in web APIs and applications. Converting CSV to JSON makes it easy to use tabular data in JavaScript code, REST APIs, and NoSQL databases like MongoDB and CouchDB.
When to convert?
Convert CSV to JSON when you need to feed data into a web app, API, or JavaScript program. JSON is the standard data format for REST APIs, configuration files, and modern web services. Need to go the other way? Use our JSON to CSV converter.
Frequently asked questions
Is my data safe when converting CSV to JSON?
Yes. The entire conversion runs locally in your browser using JavaScript. Your CSV data is never uploaded to any server — it stays on your device the whole time.
Is the first row used as headers?
Yes. The first row of your CSV is automatically used as the JSON object keys. Each subsequent row becomes a JSON object with those keys.
Does it handle special characters and UTF-8?
Yes. The converter fully supports UTF-8 encoding, including accented characters, CJK text, emoji, and any other Unicode characters in your CSV data.
Can I convert large CSV files?
Yes. Since processing happens entirely in your browser, there are no server-imposed limits. Very large files may take a moment depending on your device's processing power.
Working with CSV files on your Mac? Open them in Google Sheets with a double-click.
CSVtoSheets is a Mac app — double-click any CSV, XLS, or XLSX to open it in Google Sheets instantly.
Download for Mac — Free TrialNo credit card required