📊 → { } CSV to JSON

Convert CSV data to JSON format. Auto-detects delimiter and types. Nested object support. Free, private — all processed in your browser.

CSV Input (paste or drop file):

📁 Open CSV File

JSON Output:

Pretty print Infer types (numbers, booleans) Parse nested paths (a.b → object)

All processing in-browser · No upload to server · Your data stays private

About CSV to JSON Converter

Convert CSV data to JSON format. Auto-detects headers as keys, handles nested structures with dot notation. Perfect for importing spreadsheet data into APIs, databases, or JavaScript applications. All in your browser.

Header Detection

First row auto-detected as column headers. Option to specify custom headers or generate numbered keys.

Nested JSON

Dot-notation in headers (e.g. "address.city") creates nested JSON objects. Clean, structured output.

API-Ready Output

Output formatted as a JSON array of objects. Perfect for REST APIs, MongoDB imports, or config files.

Browser Privacy

CSV data processed locally. No server uploads — sensitive business data and customer lists stay private.