What delimiters are supported?

Comma, semicolon, tab and pipe are auto-detected; you can also override manually.

How are empty cells represented?

As empty strings by default, or as null if type inference is on.

Which delimiters are supported?

Commas, semicolons and tabs are all handled, which covers CSV files exported from English and European locale spreadsheets as well as TSV dumps.

Should I let the tool convert numbers automatically?

Convert when the columns are genuinely numeric. Keep values as strings when a column holds identifiers, postcodes or phone numbers — automatic conversion would strip meaningful leading zeros.

What if my file has no header row?

Add one before converting, or the first data row will be consumed as keys. A header row is what gives each JSON property its name.

CSV to JSON Converter

Parse CSV data (with or without headers) into a clean JSON array. Auto-detects the delimiter and infers numeric/boolean types so downstream code doesn't have to.

Last updated: 2026-07-21 · Runs 100% in your browser

header row

infer types

Input0 chars · 0 lines

Output

Result will appear here.

// What is the CSV to JSON?

The CSV to JSON converter parses delimited text into a clean array of objects, using the header row for keys. It handles the parts of CSV that trip up naive splitting on commas: quoted fields containing delimiters, escaped double quotes, embedded newlines inside a cell, and files that use semicolons or tabs instead of commas. You can choose whether numeric and boolean-looking values are converted to real JSON types or kept as strings, which matters when a column contains identifiers with leading zeros. The result is ready to paste into a test fixture, a seed script or an API request body. Parsing runs in your browser, so exports containing personal data never leave your device.