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CSVJSON are online formatting and conversion tools that I use as a developer.

  • CSV to JSON: Convert CSV (Excel) to JSON format.
  • JSON to CSV: Convert JSON to CSV format (Excel).
  • SQL to JSON: Convert SQL (CREATE TABLE and INSERT INTO statements) to JSON format.
  • JSON Validator: Cerifies that your JavaScript Object Notation adheres to the JSON specification.
  • JSON Beautifier: Format and make beautiful JSON. Convert it to JavaScript code (drop quotes on keys).
  • Data Janitor: Online tool for Excel and Google Sheets data cleaning and transformation using user-written JavaScript.
  • More to come...

CSVJSON is built using PHP CodeIgniter, Bootstrap 3.0, Underscore, JSON, jsonlint, and other goodies.

Forking welcome:


  1. Clone and drop inside a folder under a virtual host using your favorite WAMP or LAMP stack.
  2. Create a data directory at the same level as www. Saved data for permalinks get stored there.
  3. Create file application/config/aws_s3.php and paste this into it:
if (!defined('BASEPATH')) exit('No direct script access allowed');
$config['aws_s3'] = array('supported' => defined('AWS_S3_URL'));

CodeIgniter's index.php will start everything. If you plan to deploy in a production environment, edit it and change this with your domain name:

if (strpos($_SERVER['SERVER_NAME'], "") !== FALSE) {
    define('ENVIRONMENT', 'production');
} else {
    define('ENVIRONMENT', 'development');

If you use Apache, CSVJSON comes with a .htaccess all ready to go. Blocks remote access of sensible files like this README, .git, etc...


To add a new tool, best to look at an existing example. For example csv2json. Follow these steps:

  1. Create a controller (under application/controllers/). Must inherit MY_Controller.
  2. Create a view (under application/views/).
  3. Create the conversion JavaScript file (under js/src/csvjson). This file will contain your new conversion function on the CSVJSON global.
  4. Create the UI JavaScript file (under js/src/). This will drive the UI, and call your conversion function to do the work.
  5. Create a CSS file (under css) or you can put your CSS directly inside css/main.css.
  6. Update $config['assets'] located in the application/config/assets.php file and add reference to your JavaScript and optionally CSS files.

You are then ready to code. In development (ENVIRONMENT=development), your JavaScript and CSS files get loaded.

Deploy for production

To deploy for production, you must perform a build. Bundles are compiled in the Build controller (application/controllers/build.php). To perform a build, simply call the controller. JavaScript bundles get built - minified and concatenated.

For example, if you are developing under localhost, you would type in a browser http://localhost/build

Built assets must then be committed to Git. In production, built assets are loaded.

Directory Structure


Directories application and system are those defined by CodeIgniter. Assets are located under js and css folders. 3rd party JavaScript libraries are under js/3rd and application source code (the stuff you write) is under js/src. Bundled/minified JavaScript files are directly under js.


Saved sessions are stored in Amazon Web Services Simple Storage. The following config file must exist, but never be committed and versioned in Git application/config/aws_s3.php

if (!defined('BASEPATH')) exit('No direct script access allowed');
if (defined('CURL_SSLVERSION_TLSv1')) {
  define('AWS_S3_KEY', 'XXXX');
  define('AWS_S3_SECRET', 'XXXX');
  define('AWS_S3_REGION', 'us-east-2');
  define('AWS_S3_BUCKET', 'csvjson');
  define('AWS_S3_URL', 'https://s3.'.AWS_S3_REGION.''.AWS_S3_BUCKET.'/');
$config['aws_s3'] = array('supported' => defined('AWS_S3_URL'));


Q: What if I fund a bug or would like to propose an enhancement?
A: Report it via GitHub issues.

Q: What performs minification?
A: JavaScript minification is done with a PHP implementation of Douglas Crockford's JSMin. See application/libraries/jsmin.php for details. CSS minification comes from See application/libraries/cssmin.php.

Q: Does bundling and minification support CSS pre-processing like SASS, LESS or Stylus?
A: No. Feel free to fork and add it. Would be nice.


Online conversion and formatting tools for JSON, CSV and SQL.




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