Playable Detective

Inspect the current page for images and videos used in HTML5 playables, including base64 assets and hidden elements.

Playable Detective is a lightweight Chrome extension built for creative reviewers, ad ops, and QA engineers who need a fast, reliable way to audit the media inside HTML5 playable creatives. Open a playable in Chrome — whether it's hosted online or a local .html file — click the extension, and instantly see every image and video the page references, including the ones that are hidden, swapped in via JavaScript, or embedded as base64 data: URLs. What it finds - Images from <img> elements - Videos from <video> and nested <source> elements - Video poster frames - Media URLs referenced in CSS background-image - Both regular URLs and base64 data: URLs - Hidden assets (display: none, visibility: hidden, opacity: 0, zero-size, or the hidden attribute) What you see - A clean, scrollable list of every asset on the page - Inline previews for images and videos - Tags for asset type (image / video), source (URL / base64), and visibility (visible / hidden) - One-click open in a new tab — even for base64 assets — so you can inspect anything full-size - Deduplicated results so the list stays readable on heavy creatives Why reviewers like it - Cuts manual review time on playable ads from minutes to seconds - Surfaces hidden or embedded media that's easy to miss in DevTools - Works on locally opened HTML files (enable "Allow access to file URLs" in extension details) - Minimal permissions — only activeTab and scripting, no background tracking, no network calls of its own Permissions - activeTab — read the page you're currently looking at, only when you click the extension - scripting — run the scan script in the active tab Playable Detective does not collect, transmit, or store any data. Everything runs locally in your browser.