Online CSV to JSON Converter Tool

Advanced CSV to JSON Converter

Transform your CSV data into various JSON formats with ease and precision

1. Input

2. Conversion Options

3. Output Options

4. Result

User Guide

Input CSV Data

Upload CSV

Find:

Replace with:

Case sensitive

Match whole word

No data loaded

Conversion Options

1. CSV to JSON - Array of Objects

Standard conversion that creates an array of JSON objects matching your CSV structure.

Default Most Common

2. CSV to Keyed JSON

Generate JSON with a specified key field as the key value to a structure of the remaining fields (hash table or associative array).

Select Key Field:

3. CSV to JSON Array

Creates an array of CSV values where each row is represented as an array, or a structure with column names and data as an array.

4. CSV to JSON Column Array

Generates an array where each column of values are grouped in their own array.

5. TSV to JSON

Converts Tab-Separated Values to JSON format.

Advanced Options

Detect numeric values

Automatically convert numeric strings to numbers in JSON

Detect boolean values

Convert "NULL" to null

Convert empty values to null

Skip empty fields

Terse/JSON Lines Mode

One object per line with no commas (MongoDB compatible)

Attribute Case: Unchanged Lowercase Uppercase Camel Case

Limit Records:

Top Level Property Name:

Output Options

Output Format: Array Hash Minify

Indentation: 2 spaces 4 spaces Tab None (minified)

Sort by Field:

Ascending Descending

Field Selection

Select All Fields

Filter Data

Select Field

equals not equals greater than less than contains starts with ends with

Result

Find in Result:

Replace with:

Case sensitive

Match whole word

Conversion Details:

No conversion performed yet. Enter your CSV data and click "Convert".

Result will appear here

User Guide

Quick Start

1. Input your CSV data by pasting directly, uploading a file, or loading from a URL
2. Select your desired conversion method from the 5 available options
3. Configure additional options if needed (field selection, sorting, etc.)
4. Click "Convert" to generate your JSON
5. Copy or download your result

Keyboard Shortcuts

Ctrl+Z Undo last action

Ctrl+Y / Ctrl+Shift+Z Redo action

Ctrl+F Open Find & Replace

Ctrl+Enter Convert data

Ctrl+S Download result

Ctrl+C (in result area) Copy result

Alt+1...5 Switch between tabs

Ctrl+K / Ctrl+P Open command palette

Advanced Features

• Undo/Redo: Revert or reapply changes using the history buttons or keyboard shortcuts.
• Find & Replace: Search for text in your input or output and replace it with new text.
• Data Type Detection: Automatically convert string values to their appropriate types (numbers, booleans, nulls)
• Field Selection: Choose which fields to include in the output and rearrange their order
• Filtering: Filter records based on field values using various operators
• Sorting: Sort data before conversion based on any field
• Attribute Case: Transform field names to lowercase, uppercase, or camelcase
• Terse/JSON Lines Mode: Generate one object per line without commas (MongoDB compatible)

Conversion Options Explained

• CSV to JSON - Array of Objects: Standard conversion that transforms each CSV row into a JSON object with fields as properties.
• CSV to Keyed JSON: Creates a JSON object where a specified column value becomes the key, and the remaining columns form the value object.
• CSV to JSON Array: Converts CSV data into arrays of values instead of objects with named properties.
• CSV to JSON Column Array: Groups data by column instead of by row, creating arrays of values for each column.
• TSV to JSON: Handles tab-separated values files by using tabs as delimiters instead of commas.

Example CSV Data

id,name,email,age,active
1,John Doe,john.doe@example.com,32,true
2,Jane Smith,jane.smith@example.com,28,true
3,Bob Johnson,bob.j@example.com,45,false
4,Alice Brown,alice.b@example.com,36,true

Advanced CSV to JSON Converter | All processing happens in your browser - no data is sent to any server

Press Ctrl+K to open command palette

Feature	Details
Price	Free
Rendering	Client-Side Rendering
Language	JavaScript
Paywall	No

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About This Tool

Key Features

Conversion Options

• CSV to JSON - Creates an array of JSON structures from CSV data
• CSV to Keyed JSON - Generates JSON with a specified key field
• CSV to JSON Array - Converts to an array of CSV values
• CSV to JSON Column Array - Each column's values placed in separate arrays
• TSV to JSON - Supports tab-separated values conversion

Input Methods

• File upload functionality
• URL import option
• Direct CSV data input
• Demo data examples with one-click loading

Advanced Options

• Automatic detection of numeric values, logical values, and nulls
• Case transformation for attribute names (upper/lower)
• Record limiting for large datasets
• Field selection and reordering
• Filtering capability with query tool
• Sorting options (ascending/descending)
• NULL handling options
• Empty field management
• Terse and JSONLines modes

Output Controls

• Output format selection (Array/Hash/Minified)
• Parsing options for numbers and JSON
• Transpose functionality
• Copy to clipboard button
• Download result button
• JSON preview with syntax highlighting

User Guidance

The tool includes:

• A comprehensive guide explaining each conversion type
• Helpful tooltips for advanced options
• Result highlighting with syntax coloring
• Calculation explanation section
• Clear/reset functionality for starting over

Technical Implementation

The converter offers deep customization through:

• Dynamic option panels that change based on conversion type
• Real-time validation and error reporting
• Efficient parsing algorithms for handling large datasets
• Responsive design that works across all device sizes

How It Works?