CSV to JSON
Convert CSV data to JSON format. Handles quoted fields, commas in values, and automatic type detection for numbers and booleans.
About CSV to JSON Conversion
CSV (Comma-Separated Values) is the most universal data exchange format, supported by every spreadsheet application, database tool, and programming language. Converting CSV to JSON transforms tabular data into a structured format that web applications, APIs, and NoSQL databases can consume directly. CSV to JSON conversion is the bridge between spreadsheet-based data workflows and modern web development, enabling you to import Excel or Google Sheets data into any JavaScript application.
CSV Parsing Quick Reference
Proper CSV parsing must handle several edge cases defined in RFC 4180: fields containing commas must be enclosed in double quotes, double quotes within quoted fields are escaped by doubling them (""), and fields can contain newlines when quoted. This converter correctly handles all of these cases. It also performs automatic type detection -- values that look like numbers are converted to numeric types, "true" and "false" become booleans, and everything else remains a string.
The first row of the CSV is always treated as the header row, with each value becoming a JSON property key. For datasets with inconsistent column counts, missing values are represented as empty strings. This approach is compatible with MongoDB imports (mongoimport), Elasticsearch bulk indexing, Firebase Realtime Database, and most REST API payloads that expect JSON arrays. For large CSV files, consider streaming parsers in production code to avoid memory issues.