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.

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.

header row

infer types

Input0 chars · 0 lines

Output

Result will appear here.

// Features

▸Automatic delimiter detection
▸Header row toggle
▸Optional numeric and boolean type inference
▸Streaming-safe for large inputs

// How to use

01Paste your CSV data.
02Toggle header row and type inference to taste.
03Copy the JSON array from the output pane.

// FAQ

Your data never leaves your browser. This tool runs 100% locally — no upload, no logging, no analytics on your inputs.

// Related tools

JSON to CSV

Convert arrays of JSON objects to CSV with optional dot-notation flattening.

JSON Formatter

Pretty-print and validate JSON with adjustable indentation. Runs entirely in your browser — nothing is uploaded.

JSON Viewer

Browse JSON as a collapsible tree with syntax highlighting. Local-only.