CSV to JSON

CSV to JSON is a developer utility that transforms comma-separated value data into structured JSON arrays. Whether you're working with exported spreadsheets, database dumps, or raw tabular data, this tool parses your CSV input — including headers — and outputs a properly formatted array of JSON objects, ready to use in your application or API.

For developers, this conversion is a daily necessity. REST APIs, JavaScript frontends, and NoSQL databases like MongoDB all speak JSON natively. Rather than writing throwaway parsing scripts or importing heavyweight libraries, you can drop your CSV in and get valid JSON out in seconds — saving time and eliminating manual formatting errors.

Using the tool is straightforward: paste your CSV data into the input field, with the first row treated as the header row defining the JSON object keys. Each subsequent row becomes a JSON object in the output array, with values mapped to their corresponding header keys. For example, a CSV with columns id,name,email and two data rows will produce a JSON array of two objects, each containing id, name, and email properties.

The tool handles common edge cases you'd encounter in real-world data, including quoted fields that contain commas, fields with embedded newlines wrapped in double quotes, and mixed data types — numbers and booleans are preserved as their native JSON types where detectable, rather than being forced into strings. Empty fields are represented as empty strings or null depending on context.

A few things to keep in mind: ensure your CSV uses consistent delimiters and that your header row has no duplicate column names, as duplicate keys in a JSON object lead to data loss. If your CSV was exported from Excel, watch for BOM characters at the start of the file, which can corrupt the first header key — stripping those before pasting will give you clean output.