JavaScript file for exporting GitHub labels to a JSON object.

github-labels-export.js

/*

Purpose: Export the configuration settings for GitHub Labels.
(c) James Perrin, MIT License, https://www.countrydawgg.com, | @jamesperrin

Exporting Instructions:

1. Open a web browser.
2. Navigate to the desired GitHub repository.
3. Navigate to Issues tab.
4. Navigate to Labels link.
5. Open the web browser's Developer Tools
6. Navigate to the Console
7. Copy and Paste below code into the Console.
8. Save github-labels.json to a desired computer folder location.

Please visit the below link to download the import JavaScript script.
github-labels-import.js - https://gist.github.com/jamesperrin/d811fadea2bd199ecf98195d96513afd

*/

/**
 * @description Exports GitHub repository Issues labels to a JSON file
 *
 */
(function () {
  function hex(x) {
    return ('0' + parseInt(x).toString(16)).slice(-2);
  }

  function rgba2hex(rgba) {
    rgba = rgba.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+)(,\s*\d+\.*\d+)?\)$/);
    return hex(rgba[1]) + hex(rgba[2]) + hex(rgba[3]);
  }

  // Process to export labels into a JSON object
  function getLabels() {
    const jsLabels = document.querySelectorAll('.js-label-link');

    if (!jsLabels || jsLabels.length === 0) {
      console.error('Unable to find GitHub labels!!');
      return;
    }

    const labels = [].slice.call(jsLabels).map((el) => {
      const name = el.textContent || el.innerText;
      const description = el.parentElement.nextElementSibling.firstElementChild;
      const color = rgba2hex(window.getComputedStyle(el).getPropertyValue('background-color'));

      return {
        name: name ? name.trim() : '',
        description: description ? description.innerText.trim() : '',
        color: color ? color : '',
      };
    });

    // Outputs labels to the Console
    console.log(JSON.stringify(labels, null, 2));

    return labels;
  }

  // Function save JSON object to a file
  function saveJSON(data, filename) {
    if (!data || data.length === 0) {
      console.error('Missing GitHub labels data!!');
      return;
    }

    const blob = new Blob([JSON.stringify(data, undefined, 4)], { type: 'text/json' });
    const anchorElement = document.createElement('a');

    anchorElement.download = filename;
    anchorElement.href = window.URL.createObjectURL(blob);
    anchorElement.dataset.downloadurl = ['text/json', anchorElement.download, anchorElement.href].join(':');

    const mouseEventOptions = {
      bubbles: true,
      cancelable: false,
      screenX: 0,
      screenY: 0,
      clientX: 0,
      clientY: 0,
      ctrlKey: false,
      altKey: false,
      shiftKey: false,
      metaKey: false,
      button: 0,
      buttons: 0,
      relatedTarget: null,
      region: null,
    };

    const mouseEvent = new MouseEvent('click', mouseEventOptions);
    anchorElement.dispatchEvent(mouseEvent);
  }

  // Saves labels to JSON file.
  saveJSON(getLabels(), 'github-labels.json');
})();

Updated code based on @NibrasAbuAyyash contrbutions.

View original thread on Export/import github labels

Link to code for importing GitHub labels github-labels-import.js

I was able to use this successfully. Thanks for making this available!