This is a small JS script that automatically downloads all the images in a WhatsApp conversation

download_whatsapp_images.js

// Script to download images from WhatsApp
//
// Steps to use:
// 1. Open up the conversation you want to download pics from
// 2. Open the leftmost image you want to download (the script
//    will download and advance to the next image until the last
//    image is reached.
// 3. Open the developer console and paste the script in it
// 4. Click OK on the "Download multiple files" browser prompt
//    (if it appears)
//
// Tested in Chrome 124

(function () {
  var dlTimeout = 1500;
  var nextTimeout = 100;
  var maxDownloads = 1306;
  var downloadCount = 1;
  var downloadMenu = document.querySelector('div[aria-label="Menu"]');

  var download = function () {
    if (downloadMenu) {
      downloadMenu.click();
    }

    setTimeout(() => {
      try {
        var downloadBtn = document.querySelector('div[aria-label="Download"]');
        var nextBtn = document.querySelector('div[aria-label="Next"]');

        // console.log(downloadBtn, nextBtn);

        if (downloadBtn) {
          downloadBtn.click();

          setTimeout(() => {
            nextBtn.click();

            console.log("downloadCount: = " + downloadCount);
            downloadCount += 1;
            if (downloadCount <= maxDownloads) {
              download();
            }
          }, nextTimeout);
        } else {
          // if download button not available, continue with previous photo...
          nextBtn.click();
          download();
        }
      } catch (ex) {
        console.error(ex);

        var nextBtn = document.querySelector('div[aria-label="Next"]');
        nextBtn.click();
      }
    }, dlTimeout);
  };

  download();
})();

This is my improved version of your scripts:

(function () {
  var dlTimeout = 1500;
  var nextTimeout = 100;
  var maxDownloads = 1306;
  var downloadCount = 1;
  var downloadMenu = document.querySelector('div[aria-label="Menú"]');

  var download = function () {
    if (downloadMenu) {
      downloadMenu.click();
    }

    setTimeout(() => {
      try {
        var downloadBtn = document.querySelector('div[aria-label="Descargar"]');
        var prevBtn = document.querySelector('div[aria-label="Anterior"]');

        // console.log(downloadBtn, prevBtn);

        if (downloadBtn) {
          downloadBtn.click();

          setTimeout(() => {
            prevBtn.click();

            console.log("downloadCount: = " + downloadCount);
            downloadCount += 1;
            if (downloadCount <= maxDownloads) {
              download();
            }
          }, nextTimeout);
        } else {
          // if download button not available, continue with previous photo...
          prevBtn.click();
          download();
        }
      } catch (ex) {
        console.error(ex);

        var prevBtn = document.querySelector('div[aria-label="Anterior"]');
        prevBtn.click();
      }
    }, dlTimeout);
  };

  download();
})();

The idea is that videos for example are skipped. But be careful with the timeouts if they are too quickly then "Download" button is not available.

Also, query selectors with aria-labels are language sensitive.

@z3nth10n Thanks! I've updated the gist based on your proposal.