CSV ↔ JSON Converter
Translate data records seamlessly between CSV spreadsheets and JSON files offline instantly.
CSV Dataset
CSV Parameters
Column Separator (Delimiter)
First row is Header names
JSON Output / Input
JSON Formatter
Indent Spacing Format
Understanding CSV and JSON Structures
**CSV (Comma-Separated Values)** is a simple tabular format where rows are separated by newlines, and columns are delimited by commas (or other markers like semicolons or tabs). It is widely supported by spreadsheet software like Microsoft Excel and Google Sheets.
**JSON (JavaScript Object Notation)** is a structured text-based data format that is easy for humans to read and write, and extremely easy for machines to parse and compile. It is the de-facto standard format for APIs, databases, and configuration settings.
Frequently Asked Questions (FAQ)
How are commas inside cells handled in CSV data?
If a text cell contains a comma, the entire value must be wrapped in double quotes (e.g. `"Doe, John"`). If the cell contains quotes, they are escaped by doubling them (e.g. `"He said ""Hello"""`). This converter conforms to the RFC 4180 specification to handle all cell-escaping rules properly.
How does JSON format map to a CSV table?
A typical CSV represents a flat table, whereas JSON supports nested objects and arrays. When translating JSON to CSV, the converter flattens nested key hierarchies and compiles all unique root keys across all objects to form the table headers, filling missing properties in individual entries with empty values.
Is my uploaded data safe?
Yes. This tool runs 100% locally in your browser. All file parses, uploads, conversions, and downloads occur within client-side memory using the JavaScript File API. No data is transmitted to external servers, protecting your privacy.