Convert CSV to JSON

How to Convert CSV to Array JSON in Python?

Explore other examples linked to Python principles in the Python Programming Examples Guide and advance from novice to expert level in the Python Programming Language.

What exactly is a CSV File?

A Comma Separated Values (CSV) file is a basic text file that contains a list of data separated by commas. CSV files are often used to transfer data across programs. CSV files are commonly supported by Contact Managers and Databases.

These CSV files are also known as Comma Delimited or Comma Separated Values files. These files mostly employ commas to separate or delimit data. However, sometimes additional characters, such as semicolons, are used. The idea is to export complicated data from one software to a CSV file before importing it into another program.

A Comma Separated Values (CSV) file has a straightforward format that lists and separates data using commas. CSV files are designed to facilitate the import and export of data from and to other programs. The generated data is readily accessible by humans and may be seen using a text editor such as Notepad or a spreadsheet application such as Microsoft Excel or Google Sheets.

What exactly is a JSON Array?

JSON (JavaScript Object Notation) is a notation similar to dictionaries that may be used in Python by importing the JSON module. Each record (or row) is maintained as its own dictionary, with column names acting as the dictionary's Keys. All of these items are preserved as dictionaries inside a nested dictionary to form the whole dataset. It is stored with the extension.
What exactly is a JSON Array
The JSON format was derived from a subset of JavaScript. Despite this, it is referred to as a language-independent format and is supported by a variety of programming APIs. JSON is often used in Ajax Web Application Programming. JSON's popularity as an alternative to XML has progressively developed over the last several years.

While many applications use JSON for data transport, they may not save JSON files on their hard drives. Internet-connected computers engage in the exchange of data.

Python CSV to JSON array conversion

Consider the CSV file below as an example:


Now, we create a JSON file with no data, named samplejsonfile.json.

Here, we transform the data in the preceding CSV file to a JSON array and save it in samplejsonfile.json.


Import module csv using import keyword.

Utilize import to import the json module.

Put the contents of a random CSV file into a variable.

Transfer an empty JSON file to another variable.

Create a blank dictionary

Open the specified CSV file using the open() function.

Pass the supplied csv file as an argument to the DictReader() function of the csv module to convert the data of the given csv file into a dictionary.

Put it into a variable.

Using the for loop, iterate over the rows of the preceding.csv file.

Display row information for reference

Append each row's data to the JSON dictionary previously constructed.

Using the open() method in write mode, open the specified json file.

Pass the preceding json dictionary and indentation as parameters to the dumps() function of the json module to dump all the data into the gvn jsonfile variable (samplejsonfile.json)

Indentation is employed here for attractive printing.

The Termination of the Program.

How to Convert Comma Separated Values CSV to JSON using Node.js?

CSV is a comma-separated values file with the extension.csv that enables tabular data to be stored. This article describes how to convert CSV data to JavaScript Object Notation (JSON) without utilizing a third-party npm package. The primary distinction from standard conversion is that the values of any row may be Comma Separated, and as we know, various columns are likewise separated by commas.
In this method, the contents of the CSV file will be loaded into an array and then separated depending on a delimiter. All CSV rows will be transformed to JSON objects and placed to the output array, which will then be translated to JSON and a JSON output file will be created.

Txt to JSON Conversion

This Toolset will show you how to convert TXT to JSON using Microsoft Visual Studio's built-in converter or a web browser with AnyConv. With AnyConv, the maximum file size is 50 MB.

In a web browser, go to https://anyconv.com/txt-to-json-converter/. Any web browser may be used to convert TXT to JSON.

What is a CSV file?

A CSV file is a text file in which information is separated by commas.

CSV files are found most often in spreadsheets and databases.

Using a CSV file, you may transfer data across applications that cannot normally communicate data.

If you use spreadsheet apps such as Microsoft Excel or Google Sheets, or import certain types of data into Microsoft Outlook, you will surely encounter a comma-separated values (CSV) file.

A CSV file is a basic text file that can be opened in a number of applications, including Notepad and any other tool that supports plain text.

Unique to a CSV file is the manner in which its contents are structured. Here is information on CSV files and how to utilize them.

What is the purpose of a CSV file?

As the name suggests, a CSV file frequently separates information using commas. It is a method for communicating structured data, such as the contents of a spreadsheet, between applications that cannot always communicate directly.

If two applications can both read CSV files, they can interchange data. For instance, you may export contact information from Microsoft Excel as a CSV file and import it into Microsoft Outlook's address book.

Each line of a standard CSV file has the same data sequence so that any application that needs to read it knows what to expect:

  • Product, Size, Color, Price
  • Blue shirt, medium, $14
  • Red Large Shirt for $15
  • Pants, Medium, Khaki, $23

Contrary to its name, a CSV file does not need commas to separate individual bits of information. This delimiter may be a semicolon, a space, or another character, however the comma is the most frequent.

Excel instructions for opening a CSV file

  1. In Excel's ribbon, click the File tab, followed by the Open button.
  2. Click Browse and then click the drop-down menu to the right of the File name field in the File Explorer window. Change the default setting from All Excel Files to All Files.
  3. Navigate to the storage location of the CSV file and pick it. Follow the steps in the Text Import Wizard to open the CSV file.
  4. Click Next after selecting the option to import delimited data (comma or other separator).
  5. Select the kind of delimiter used by the file. You will know you've chosen the right delimiter when the preview is appropriately structured and arranged. Select Next.
  6. If necessary, you may click a column to alter the data's formatting type. When satisfied, click the Finished button.

Google Sheets CSV file opening instructions

  1. In Google Sheets, choose File followed by Open.
  2. Locate the CSV file and choose it. If necessary, click Upload before dragging the file from your PC.
  3. The CSV will be automatically formatted and shown in Sheets.

Text editor instructions for opening a CSV file

Text editors do not automatically format or arrange CSV files, unlike spreadsheets. Instead, the data will simply be split by a comma or other separator. It is often not visually pleasing, but it is a simple method to see the file's contents.

  • Open a text editor such as Notepad or TextEdit on Windows.
  • Select File, followed by Open.
  • Select the CSV file in the "File Open" dialogue box. Depending on the editor, a drop-down menu may appear to the right of the "File name" field. If "Text Documents" is the existing setting, change it to "All Files."
  • Locate the CSV file and choose it.

How to generate a CSV file

Creating CSV files may be accomplished in many ways.

Using a Microsoft Excel spreadsheet

  • Launch Microsoft Excel and choose the File tab. In the resulting menu, choose Save As.
  • Change the File Format to Text (Tab-separated) or CSV (Comma delimited).
  • Navigate to the directory where you would want to store the file, name it, and click Save.

Using Google Sheets

  1. Launch the Google Sheet you want to export.
  2. Select File, followed by Download, and then Comma Separated Values (.csv).

Utilizing a text editor

  1. Using a text editor, such as Notepad on Windows or TextEdit on macOS, create a new text file.
  2. Enter the information you want to include in the document, separating each value with a comma and each row with a new line.
    Save the file using the.csv extension.

What is the JSON format?

A JSON file is a file that holds basic data structures and objects in the standard data exchange format JavaScript Object Notation (JSON). It is used mostly for data transmission between a web application and a server. JSON files are compact, text-based, readable by humans, and editable using a text editor.

Additional Information

The JSON format was initially derived from a subset of JavaScript, but it is now regarded as a language-independent format since it is supported by a wide variety of programming APIs. JSON is often used in Ajax Web application development. It is growing in popularity as an alternative to XML. 
JSON format
Although many programs utilize JSON for data exchange, they may not store.json files on the hard drive since the data exchange happens between Internet-connected devices. Nevertheless, some programs allow users to save.json files. Google+, for example, utilizes JSON files to store Profile data. After login in, you may pick "Data liberation" and "Download your Profile data" from the "Data liberation" page. Mozilla Firefox backs up its bookmarks using JSON files. The files are stored in the bookmarkbackups subdirectory of the user's Firefox profile directory. You may also manually back up your Firefox bookmarks and import them into a new installation of Firefox. To restore bookmarks, enter the Library, click the import/export button in the top bar, choose Restore Choose File..., and then pick your JSON backup file.

How to access a JSON file

JSON files are just text files, therefore they can be opened in any text editor, including:

  • Microsoft Writer (Windows)
  • Apple TextEdit (Mac)
  • Vim (Linux)
  • The GitHub Atom (cross-platform)

Additionally, you may open a JSON file with Google Chrome and Mozilla Firefox by dragging and dropping the file into the browser window.

Why programmers use JSON

Software engineers need a mechanism to define and transmit data regardless of the sort of application or use case they're working on. This need exists in databases, business logic, user interfaces, and all forms of system communication. There are several techniques to data interchange structure. The two major categories of data are binary and text-based. JSON is a text-based format, so both humans and robots can read it.
JSON is a very effective data format for several reasons. First, it is native to JavaScript and is utilized as JSON literals inside JavaScript applications. JSON is also compatible with various computer languages, making it helpful for data interchange across disparate systems. Finally, it is readable by humans. JSON is a highly flexible data framework for languages. It is also rather easy to use, particularly in comparison to other formats.

JSON schema and formatter JSON

JavaScript and JSON are very versatile, but sometimes you need more structure than they provide. Strong typing and abstract types (such as interfaces) help organize large-scale applications in languages like Java. A schema offers a comparable structure for SQL storage. If your JSON documents need additional structure, you may use JSON schema to specify the properties of your JSON objects. Once developed, the schema may be used to check object instances and assure conformance with the schema. Dealing with machine-processed JSON that is minified and unreadable is a further challenge. Fortunately, this issue is simple to resolve. Simply go to the JSON Formatter & Validator (I use this tool, but there are others), paste your JSON, then click on the Process button. A human-readable version will be shown for your convenience. Most IDEs additionally provide a JavaScript formatter for JSON formatting.

JSON support in TypeScript

TypeScript enables the definition of types and interfaces, hence it is sometimes advantageous to utilize JSON with TypeScript. Similar to a schema, a class describes the permissible attributes of an instance of a certain type. There is no mechanism to limit properties and their types with plain JavaScript. JavaScript classes are similar to recommendations in that the programmer may specify them now and edit the JSON afterwards. A TypeScript class, on the other hand, regulates which attributes and types the JSON may have.

Processing JSON

JSON is a standard text-based format for encoding structured data