Screenshot Capture Chrome extension

{
  "manifest_version": 3,
  "name": "Screenshot Capture",
  "version": "1.0.0",
  "description": "Capture the visible area of the current tab and download it as a PNG in one click.",
  "icons": {
    "16": "icons/icon.svg",
    "48": "icons/icon.svg",
    "128": "icons/icon.svg"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Screenshot Capture",
    "default_icon": {
      "128": "icons/icon.svg"
    }
  },
  "permissions": [
    "activeTab",
    "downloads",
    "tabs"
  ]
}

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Screenshot Capture</title>
<link rel="stylesheet" href="popup.css" />
</head>
<body>
<header><h1>Screenshot Capture</h1><p class="sub">Built with ManifestGo</p></header>
<main>
<button class="primary" id="shot">Capture visible tab</button>
  <img id="preview" alt="" style="width:100%;border-radius:10px;display:none" />
  <p class="muted" id="status">PNG is saved to your downloads folder.</p>
</main>
<script src="popup.js"></script>
</body>
</html>

:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  width: 320px;
  font-family: Inter, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #1b1b1b;
  color: #f2efe9;
}
header { padding: 14px 16px 8px; }
h1 { margin: 0; font-size: 14px; font-weight: 600; letter-spacing: -0.01em; }
p.sub { margin: 4px 0 0; font-size: 11px; color: #9a958d; }
main { padding: 10px 16px 16px; display: grid; gap: 10px; }
button {
  font: inherit; font-size: 12px; font-weight: 600; cursor: pointer;
  border: 1px solid #ffffff1f; background: #ffffff0d; color: #f2efe9;
  border-radius: 10px; padding: 9px 12px; transition: background .15s ease;
}
button:hover { background: #ffffff17; }
button.primary { background: #60a5fa; border-color: #60a5fa; color: #101010; }
button.primary:hover { filter: brightness(1.08); }
input, select, textarea {
  font: inherit; font-size: 12px; width: 100%; padding: 9px 10px; border-radius: 10px;
  border: 1px solid #ffffff1f; background: #ffffff08; color: #f2efe9; outline: none;
}
input:focus, textarea:focus { border-color: #60a5fa; }
ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; max-height: 260px; overflow: auto; }
li { display: flex; align-items: center; gap: 8px; font-size: 12px; padding: 8px 10px; border-radius: 10px; background: #ffffff08; }
li span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row { display: flex; gap: 8px; }
.row > * { flex: 1; }
.big { font-size: 34px; font-weight: 700; text-align: center; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.muted { font-size: 11px; color: #9a958d; }

const preview = document.getElementById("preview");
const status = document.getElementById("status");

document.getElementById("shot").addEventListener("click", async () => {
  try {
    const dataUrl = await chrome.tabs.captureVisibleTab({ format: "png" });
    preview.src = dataUrl;
    preview.style.display = "block";
    await chrome.downloads.download({
      url: dataUrl,
      filename: "screenshot-" + Date.now() + ".png",
    });
    status.textContent = "Saved to downloads.";
  } catch (e) {
    status.textContent = "Capture failed: " + e.message;
  }
});

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128" width="128" height="128"><rect width="128" height="128" rx="26" fill="#60a5fa"/><text x="64" y="90" font-family="Inter, Arial, sans-serif" font-size="66" font-weight="700" text-anchor="middle" fill="#ffffff">S</text></svg>

# Screenshot Capture

Capture the visible area of the current tab and download it as a PNG in one click.

## Install (unpacked)
1. Open `chrome://extensions`.
2. Enable **Developer mode**.
3. Click **Load unpacked** and select this folder.

## Files
- `manifest.json` — Manifest V3 configuration
- `popup.html` / `popup.css` / `popup.js` — toolbar popup UI and logic
- `icons/icon.svg` — source icon (rasterized to PNG on download)