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CSV to JSON Converter
Turn CSV rows into structured JSON locally
Detect common delimiters, inspect parsed rows, and copy or download a clean JSON array without uploading your data.
Parsed data
Preview and JSON output
No conversion yet
Parsed rows will appear here.
JSON output will appear here.Conversion runs entirely in this browser.
CSV parsing
Automatic detection with manual control
The parser detects comma, semicolon and tab delimiters, while a manual override handles known formats. Quoted delimiters, escaped quotes and multiline fields are preserved.
Headers and malformed rows
Use the first row as object keys or generate column names. Rows with inconsistent field counts, duplicate headers or unclosed quotes produce clear location-aware diagnostics.
JSON output
Strings by default, safe inference when requested
Every cell remains a string unless primitive inference is enabled. Exact booleans, null and safe numbers are converted while padded identifiers and unsafe integers remain strings.
Focused and local
Preview up to 100 rows, then copy or download the complete JSON array. No data is saved or sent to a server.
FAQs
CSV-to-JSON questions
Can CSV fields contain commas or line breaks?
Yes. Wrap the field in double quotes and escape an embedded quote by doubling it.
What happens without a header row?
The converter generates column1, column2 and subsequent keys so the first row remains data.