# CSV to JSON

Convert a header based CSV into JSON while preserving every cell as text.

[Open this tool](https://whatson.pk/developer-csv-json-calculator/)

Category: Developer & Data

Codes and identifiers can lose meaning when leading zeros disappear during data conversion.

Use unique nonempty headers and review the JSON output as text values, including blanks.

## Inputs and controls

* CSV input
* Input separator: Comma; Tab; Semicolon; Pipe

## How to use

* Paste or enter CSV input.

* Choose input separator.

* Select Process input. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Preserving cell strings keeps identifiers such as 0012 distinct from the number 12.


## Before relying on the result

All cell values stay strings, including leading zero codes and blank cells. Headers must be nonempty and unique.


## Tool limitations

All cell values stay strings, including leading zero codes and blank cells. Headers must be nonempty and unique.

## Questions

### Are numeric looking cells converted into numbers?

No. Every cell remains a string. Decide any later numeric conversion explicitly in your application.

### What should I check before using CSV to JSON?

Check CSV input and Input separator. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-04T16:58:29+00:00

This profile describes the tool. It does not execute it or supply a professional certification.