CSV ↔ JSON Converter
Convert between CSV and JSON array format instantly
No data is sent to any server — everything runs client-side
CSV Input
Paste your CSV data
📁 Click to upload or drag & drop a CSV file
Supports .csv, .tsv, .txt
JSON Output
Converted result
What Is CSV?
CSV (Comma-Separated Values) is one of the oldest and most universal data formats. Each line represents a record, and fields within a record are separated by commas (or other delimiters like tabs or semicolons). The first line usually serves as a header row defining column names.
CSV is the lingua franca of spreadsheets, databases, and data pipelines. Every spreadsheet application (Excel, Google Sheets, LibreOffice Calc) can import and export CSV. It's the most common format for data export from SQL databases, analytics platforms, and government data portals.
CSV to JSON Mapping
When converting CSV to JSON with headers enabled, each row becomes a JSON object where header names become keys:
CSV Input
name,age,city Alice,30,New York Bob,25,London
JSON Output
[
{"name":"Alice","age":30,"city":"New York"},
{"name":"Bob","age":25,"city":"London"}
]When to Convert
Data API Integration
Import CSV exports from spreadsheets or databases into JSON-based APIs, NoSQL databases (MongoDB, CouchDB), or Elasticsearch indices.
Frontend Data Visualization
Convert CSV datasets to JSON for charting libraries (D3.js, Chart.js, Recharts) that expect JSON array input.
Spreadsheet Export
Export JSON API responses to CSV for analysis in Excel, Google Sheets, or pandas DataFrames.
ETL Pipelines
Prototype data transformations between CSV flat files and JSON documents before writing production pipeline code.
Common CSV Pitfalls
Commas inside values
Values containing commas must be enclosed in double quotes: "New York, NY". This tool handles quoted fields correctly.
Line breaks in values
Multi-line values must be quoted. Unquoted line breaks split the record incorrectly.
Encoding issues
Excel exports CSV as Windows-1252 by default, not UTF-8. Non-ASCII characters (accents, emoji) may appear corrupted. Save as "CSV UTF-8" in Excel.
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Built by JDApplications