Convert between CSV and JSON formats instantly. Upload files or paste data. Perfect for data migration, API development, and data analysis.
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Supports .csv, .json, .txt files (Max: 10MB)
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Our CSV to JSON and JSON to CSV Converter is a powerful tool for data transformation between these two popular formats. Whether you're working with spreadsheets, APIs, or databases, this tool provides seamless conversion with advanced options.
The converter supports various CSV delimiters, quote characters, and handles complex JSON structures including nested objects and arrays. It automatically detects data types and provides comprehensive previews of your converted data.
Perfect for developers, data analysts, researchers, and anyone working with data migration, API integration, or data analysis. All conversions happen instantly with detailed analysis and error reporting.
Pro Tip: Use the data preview to verify your conversion results before using them in your applications. For large datasets, consider using file upload for better performance.
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CSV (Comma-Separated Values) is a simple tabular format where each line represents a row and values are separated by commas. JSON (JavaScript Object Notation) is a structured data format that uses key-value pairs and supports nested data structures. CSV is better for spreadsheet data, while JSON is ideal for hierarchical data and APIs.
Our converter supports multiple delimiters: comma (,), semicolon (;), tab, pipe (|), and colon (:). You can select the appropriate delimiter based on your CSV file format. The tool automatically handles quoted values containing delimiter characters.
Nested JSON objects are flattened using dot notation. For example, {"user": {"name": "John", "age": 30}} becomes "user.name" and "user.age" columns in CSV. Arrays are converted to string representations by default, but you can customize this behavior.
You can upload files up to 10MB directly. For larger files, we recommend pasting the data directly into the input field or splitting the file into smaller chunks. The converter handles files efficiently in the browser without uploading to servers.
Our converter automatically detects and preserves data types: numbers remain as numbers, booleans (true/false) remain as booleans, and strings remain as strings. Empty values become null in JSON. You can enable/disable trimming of spaces from values as needed.
Yes, you can uncheck "First row contains headers" option. The converter will generate column names like "column_1", "column_2", etc. You can also manually add headers to your CSV or edit them after conversion in the JSON output.
Yes! All conversions happen entirely in your browser using JavaScript. No data is sent to our servers, ensuring complete privacy. Your files and data never leave your computer, making it safe for sensitive information.