CSV ↔ JSON Converter
Professional data conversion tool. Instantly transform comma-separated values into structured JSON objects or vice-versa entirely in-browser.
Drop your file here
CSV or JSON supported
Professional Data Transformation
Our Online CSV to JSON Converter is built for developers who need to quickly transform tabular data into structured API-ready formats. We support complex multi-line strings, custom delimiters (Tabs, Semicolons), and automatic data type detection for numbers and booleans.
Switch to JSON to CSV mode to turn your database exports or API results back into spreadsheet-compatible files. Everything happens locally in your browser using secure Javascript streams, ensuring your sensitive data never touches an external server.
No server-side processing.
Beautified or minified JSON inputs.
Conversion Guide
Handling Custom Delimiters
If your file is from a European spreadsheet, it might use a semicolon (;). Use the Delimiter dropdown to adjust and ensure clean header parsing.
Smart Type Detection
We automatically detect if a value is a Number or a Boolean, eliminating the need to wrap everything in quotes during the JSON conversion process.
Does it support large files?
Yes, because we process in-memory, you can handle thousands of rows instantly without network lag or upload timeouts.