CSV ↔ JSON Converter
Common: , ; \t |
CSV Input
JSON Output
CSV to JSON Converter: Free Online Tool (2025)
Convert CSV to JSON or JSON to CSV instantly with our free online converter. Supports custom delimiters, headers, and pretty print.
CSV vs JSON Comparison
| Format | Use Case | Structure | Size |
|---|---|---|---|
| CSV | Spreadsheets, data export | Tabular (rows/columns) | Smaller |
| JSON | APIs, web apps | Hierarchical (objects/arrays) | Larger |
Example: CSV to JSON
name,age,city John,30,New York Jane,25,Los Angeles
→
[
{"name": "John", "age": "30", "city": "New York"},
{"name": "Jane", "age": "25", "city": "Los Angeles"}
]
Example: JSON to CSV
[{"id":1,"active":true},{"id":2,"active":false}]
→
id,active 1,true 2,false
Supported Delimiters
- Comma (,) - Default
- Semicolon (;) - European CSV
- Tab (\t) - TSV files
- Pipe (|) - Custom exports
FAQ
Does it work with large files?
Best for files under 1MB. For larger, use server-side tools.
Are quotes preserved?
Yes. Values in quotes are treated as single fields.
Can I convert nested JSON?
Only flat JSON arrays of objects. Nested objects will be stringified.
Tips for Best Results
- Ensure consistent columns in CSV
- Use headers in first row
- Avoid line breaks in fields
- Copy result before leaving page
Conclusion
Fast, accurate CSV JSON converter for developers, analysts, and data teams. No installation required!
Related: JSON ↔ XML | YAML ↔ JSON