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CSV ↔ JSON Converter
Convert between CSV and JSON formats instantly. Supports custom delimiters, table preview, and file download.
Delimiter:
table_viewCSV Input
data_objectJSON Output
Why Convert Between CSV and JSON?
api
API Integration
Most APIs communicate in JSON, but your data often lives in spreadsheets as CSV. Convert between formats seamlessly for smooth integration.
database
Data Analysis
JSON is great for nested data and APIs, while CSV is perfect for tabular data analysis in Excel, Google Sheets, or pandas.
security
Privacy First
All conversion happens in your browser. Your data is never uploaded to any server, making this tool safe for sensitive information.
CSV vs JSON Format Comparison
table_viewCSV (Comma-Separated Values)
- Human-readable tabular format
- Smaller file size for flat data
- Natively supported by spreadsheet apps
- Simple, lightweight, and universal
data_objectJSON (JavaScript Object Notation)
- Supports nested and complex structures
- Standard format for web APIs
- Preserves data types (numbers, booleans)
- Easy to parse in any programming language
Frequently Asked Questions
What CSV delimiters are supported?expand_more
This converter supports four delimiters: comma (,), semicolon (;), tab, and pipe (|). The comma is the most common delimiter, but European CSV files often use semicolons since commas are used as decimal separators in many European countries.
What happens if my CSV has quoted fields?expand_more
The parser fully supports RFC 4180-compliant CSV with quoted fields. Fields containing delimiters, newlines, or double quotes can be enclosed in double quotes. Double quotes within quoted fields are escaped by doubling them (e.g., "He said ""hello""").
What JSON format does the converter expect?expand_more
For JSON to CSV conversion, the input must be a JSON array of objects (e.g., [{"name":"Alice"},{"name":"Bob"}]). Each object becomes a row, and the object keys become column headers. Nested objects are converted to their string representation.
Is there a size limit for conversion?expand_more
Since everything runs in your browser, the limit depends on your device memory. Most modern devices can handle files up to 50-100MB without issues. For very large files, you may experience a brief delay during conversion.
Is my data safe when using this converter?expand_more
Yes, absolutely. All conversion happens entirely in your browser using JavaScript. No data is ever sent to any server. You can verify this by using the tool offline after the page loads, or by checking your browser network tab.
Can I convert CSV from Excel or Google Sheets?expand_more
Yes! Simply copy your data from Excel or Google Sheets and paste it into the CSV input area. Make sure to select the correct delimiter (Excel typically uses commas, but may use semicolons depending on your locale settings).