CSV to JSON Converter

Pick a direction, paste or upload your data, and copy the converted output.

Setup

Parse CSV safely, review malformed rows, then emit structured JSON output.

Input

Advanced Options

Delimiter

Output mode

Quote char

Escape char

Flatten separator

Array handling

CSV has header row

Header normalization

Unique keys

Skip empty rows

Infer number/boolean/null types

Flatten nested JSON objects

Result

Ready.

Rows-

Columns-

Errors-

Modecsv2json

Diagnostics

Bad rows: none

Run conversion to view parse diagnostics.

Schema Controls (JSON to CSV)

Select fields to include and set output column order.

Run JSON parsing to load fields.

Column order (comma separated)

Null value format

Missing field format

Custom null text

Custom missing text

Include union of all fields across rows

Preview

Output

Convert between CSV and JSON

CSV to JSON turns each row into an object keyed by the header row. JSON to CSV flattens nested objects into dotted column names so the result opens in a spreadsheet. Malformed rows and inconsistent keys are listed before you export.

Being able to break security doesn’t make you a hacker anymore than being able to hotwire cars makes you an automotive engineer.
Eric Raymond

CSV to JSON Converter

Pick a direction, paste or upload your data, and copy the converted output.

Parse CSV safely, review malformed rows, then emit structured JSON output.

Convert between CSV and JSON

Tool categories