chrome: pinterest-auto-downloader

##### content.js

function getLargestImageURL(img) {
    const srcset = img.getAttribute("srcset");
    if (!srcset) return img.src;

    const parts = srcset.split(",").map(s => s.trim());
    const last = parts[parts.length - 1];
    return last.split(" ")[0];
}

function addDownloadButtons() {
    const images = document.querySelectorAll("img");

    images.forEach((img) => {
        const pin = img.closest("[data-test-id='pin']");
        if (!pin) return;

        const footer = pin.querySelector("[data-test-id='pinrep-footer']");
        if (!footer) return;

        if (footer.querySelector(".download-btn")) return;

        const imageURL = getLargestImageURL(img);
        if (!imageURL) return;

        const button = document.createElement("button");
        button.innerText = "Download";
        button.className = "download-btn";

        button.style.position = "absolute";
        button.style.left = "5px";
        button.style.top = "50%";
        button.style.transform = "translateY(-50%)";
        button.style.zIndex = "9999";

        button.onclick = (e) => {
            e.stopPropagation();
            chrome.runtime.sendMessage({
                action: "download",
                url: imageURL
            });
        };

        footer.style.position = "relative";
        footer.appendChild(button);
    });
}

const observer = new MutationObserver(addDownloadButtons);
observer.observe(document.body, { childList: true, subtree: true });

addDownloadButtons();

##### background.js

chrome.runtime.onMessage.addListener((message) => {
    if (message.action === "download" && message.url) {
        chrome.downloads.download({
            url: message.url,
            filename: "pinterest_" + Date.now() + ".jpg"
        });
    }
});

##### manifest.json

{
  "manifest_version": 3,
  "name": "Pinterest Auto Downloader",
  "version": "1.0.0",
  "description": "Automatically download images from Pinterest",
  "permissions": [
    "downloads",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "*://*.pinterest.com/*",
    "*://*.pinimg.com/*"
  ],
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": ["*://*.pinterest.com/*"],
      "js": ["content.js"],
      "run_at": "document_idle"
    }
  ]
}