CSV to JSON Converter
Convert CSV data into a JSON array of objects instantly. Supports auto-delimiter detection, RFC 4180 quoted fields, and file upload. Data never leaves your device.
Your CSV data, uploaded files, and generated JSON are never stored or transmitted to any server. All processing happens locally in your browser.
JSON preview will appear here after conversion.
About this tool
The CSV to JSON Converter is designed for developers, data analysts, students, and digital marketers who need to transform CSV data into JSON format without installing any software or uploading anything to a server.
Simply paste your CSV text or upload a .csv file, configure the delimiter and header options, click “Convert to JSON”, and instantly preview, copy, or download the resulting JSON array — all entirely within your browser with no data ever leaving your device.
How to Use
- 1Paste your CSV data into the editor or upload a .csv file.
- 2Configure the delimiter (Auto-detect, Comma, Semicolon, or Tab) and header options.
- 3Click "Convert to JSON" and preview the result in the editor and table view.
- 4Copy the JSON to your clipboard or download it as output.json.
Features
- Client-side processing — data never leaves your browser
- CSV file upload with size validation (max 5 MB)
- RFC 4180-compatible CSV parser with quoted field support
- JSON table preview with up to 200 visible rows
- One-click copy to clipboard and JSON file download
- Auto-delimiter detection (comma, semicolon, tab)
- Optional header row support with duplicate-key detection
- Conversion statistics: row and column counts