---
title: "CSV to JSON Converter That Handles Quotes | ToolSugar"
description: "Turn CSV into a JSON array of objects in your browser. Handles quoted commas, quotes and line breaks, any delimiter, and files without a header row."
canonical: https://toolsugar.com/tools/csv-to-json
image: https://toolsugar.com/og.png
---

# CSV to JSON

This converter turns CSV into a JSON array of objects, with the first row as the keys. It follows RFC 4180, so quoted fields can hold commas, doubled quotes and line breaks. Pick a comma, semicolon, tab or pipe delimiter, or turn the header off to get arrays. It runs in your browser.

Runs on your device

## How it works

1. Paste CSV into the CSV box, or open a .csv file.
2. Pick the Delimiter your file uses.
3. Choose whether the first row is a header or there is no header.
4. Copy the JSON or press Download to save data.json.

## Key facts

- **Where it runs**: In your browser tab. The text and files you use are never uploaded.
- **Live result**: The output updates as you type or paste, with no button to press.
- **Parsing**: RFC 4180 quoting, CRLF or LF line ends, and a leading byte order mark is ignored.
- **Values**: Every value is kept as text, so numbers and booleans are not converted.

## Common uses

- Loading a spreadsheet export into a script or a mock API.
- Converting semicolon separated European exports.
- Checking that a tricky field with a comma or a quote survived export.

## Questions

### Is my data sent to a server?

No. The conversion runs in your browser with JavaScript, so what you paste or open stays on your device. You can switch off your network after the page loads and it keeps working.

### How are duplicate or empty header names handled?

A repeated name gets a number suffix, so a second a becomes a_2, and an empty header becomes fieldN where N is the column number.

### What happens when rows have different lengths?

Short rows are padded with empty strings and extra columns get fieldN keys, so every object has the same keys.

### Why are my numbers strings in the output?

CSV has no types, and guessing would turn values like 007 or 1E5 into something else. Every value stays exactly as written, and you can convert types afterwards in your own code.

[Read the CSV to JSON guide](https://toolsugar.com/blog/how-to-convert-csv-to-json)

## Related tools

- [JSON to CSV](https://toolsugar.com/tools/json-to-csv)
- [JSON Formatter](https://toolsugar.com/tools/json-formatter)
- [YAML to JSON](https://toolsugar.com/tools/yaml-to-json)
- [XML to JSON](https://toolsugar.com/tools/xml-to-json)