📄 CSV to JSON
Convert CSV to JSON — Free & Private
Turn CSV spreadsheet data into structured JSON instantly. Perfect for feeding data into web apps, APIs, or any JavaScript-powered system. Runs entirely in your browser.
✓ Free forever✓ No upload✓ No signup✓ Instant
Ready to convert your CSV to JSON?
100% in your browser · Structured JSON · Instant download
How to Convert CSV to JSON
1
Open the Converter
Click "Convert Now" — opens on the Document tab with CSV selected.
2
Upload Your CSV
Drag & drop your CSV file or click Browse. Any CSV from Excel or Google Sheets works.
3
Convert Instantly
Conversion runs entirely in your browser — no server upload.
4
Download JSON
Your structured JSON file downloads automatically, ready to use.
Why Convert CSV to JSON?
- 🌐 Web-ready — JSON is native to JavaScript and all modern web frameworks
- 🔗 API compatible — use your data directly in REST APIs and web services
- 📊 Structured data — each CSV row becomes a named JSON object
- 🔐 100% private — files stay on your device, never uploaded to any server
- 🆓 Free forever — no watermarks, no limits, no credit card
- ⚡ Instant — browser-based conversion, results in seconds
Features
100% Private
Files never leave your browser. Zero server uploads.
Instant
Conversion completes in seconds.
Free
No account, no fee, no watermarks. Ever.
Batch Convert
Convert multiple CSV files to JSON in one go.
Full Data
All rows become structured JSON objects.
Mobile-Friendly
Works on any device — phone, tablet, desktop.
Frequently Asked Questions
Yes, completely free with no limits or watermarks. Convertlo runs entirely in your browser.
No. All conversion happens locally in your browser. Your files never leave your device.
Each row in your CSV becomes a JSON object, with column headers from the first row as keys. The result is a JSON array of objects.
Yes. Standard comma-separated CSV files with a header row are supported. Files from Excel, Google Sheets, and most data tools work perfectly.
Yes — enable Batch Convert mode to process multiple CSV files at once, each producing its own JSON output.