Convert CSV to JSON
CSV parsing runs in-browser only.
Why this tool works well
- Supports multiple delimiters and optional headers.
- Provides quick pretty-print output for review.
- Conversion runs locally for safer data handling.
- When preparing test fixtures for a backend API, export your test data from a spreadsheet as CSV, convert it here, and paste the JSON array directly into your fixture file or seed script.
- If your CSV uses a semicolon or tab delimiter instead of a comma, the converter handles those too. Check the delimiter setting before converting to avoid merged column values.
Use cases
Spreadsheet exports
Turn tabular exports into JSON quickly.
API fixtures
Create local JSON test payloads from CSV.
Migration prep
Normalize old list data for modern systems.
Practical examples
Header row
Input: name,age
Output: [{"name":"...","age":...}]
No header mode
Input: value1;value2
Output: Generated col1, col2 keys
Suggested workflow
FAQ
Can I use semicolon delimiters?
Yes, semicolon, comma, tab, and pipe are supported.
Is CSV uploaded to a server?
No, conversion happens in your browser.
Does the converter handle CSV files with quoted fields?
Yes. Fields that contain commas or line breaks are typically wrapped in quotes in the CSV format. The converter handles standard RFC 4180 quoting so those fields are parsed as single values.
What happens to empty cells in the CSV?
Empty cells are converted to empty strings in the JSON output by default. Depending on your use case you may want to post-process the output to replace empty strings with null values.
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