Instant scan
Checks and counts every iframe, visible or hidden, the moment the tab loads.
Iframe Detector · Free iframe checker for Chrome
Every iframe on any page.One tap away.
Iframe Detector is a free Chrome extension that checks, detects and highlights every iframe on any page — same-origin, cross-origin, ads, hidden trackers. Copy, inspect, export. Built for developers and QA.
- 0
- URLs tracked
- 176KB
- installed size
- 3
- export formats
6 Found
What counts
Every iframe, named.
video embed
ad slot · 300×250
payment widget
newsletter signup
social embed
tracking pixel · 1×1 · hidden
Features
Everything you need, nothing you don't.
Origin breakdown
Color-coded: same-origin, cross-origin, ad slots and trackers.
In-page highlight
Draws a dashed outline around each frame with an origin-tinted badge.
Copy & inspect
One click copies the URL or opens the full <iframe> tag.
Three exports
JSON, CSV, or Markdown — fits whatever tool you use next.
Privacy-first
Anonymous, aggregate-only usage events (e.g. 'popup opened') — no URLs, no page content, no PII.
Three steps.
Install
One click from the Chrome Web Store — no account, no setup.
Scan
Open any page, click the toolbar icon. Check every iframe in the list — visible, hidden, cross-origin.
Ship
Copy a URL, toggle highlights, or export the full list in three formats.
One tool, many jobs.
Ad audit
Check and separate real content from tracking pixels in one glance.
6 Found
QA checklist
Check every embedded frame — each one is a test surface. See the full set.
6 Found
Security sweep
Check for hidden iframes, 1×1 pixels, suspicious origins — all flagged instantly.
6 Found
Export
Three formats. One click.
.json
Structured · full attributes
.csv
Spreadsheet · one row per frame
.md
Markdown · paste into a ticket
Guides · code-first reference
Iframes, explained.
Short, paste-ready answers to the questions developers actually ask about iframes — detecting them, finding hidden ones, sandboxing, lazy-loading, and stopping clickjacking. Every snippet works as-is in DevTools.
Tutorial · Detection
How to detect iframes
Three working ways to find every iframe on a page — a one-liner in DevTools, an enriched audit script, and a one-click extension. With code you can paste right now.
5 min readSecurity · AuditFind hidden iframes
The patterns invisible iframes use to hide — display:none, 1×1 pixels, off-screen tricks — and how to surface every single one in seconds.
4 min readReference · JavaScriptAm I inside an iframe?
The one-line JavaScript check that tells you whether your page is being framed — with the live answer right on this page, the caveats, and how to prevent framing.
3 min readSecurity · Attack & defenseClickjacking — and how to stop it
How a transparent iframe can hijack any click. A working proof of concept, the four defense headers that matter, and how to check whether your own site is vulnerable.
6 min readReference · Sandboxiframe sandbox attribute
Every sandbox flag, what it allows, what it blocks, and the one combination you should never write. With real recipes for embedding user HTML, payment widgets, and third-party scripts.
7 min readReference · Quick lookupiframe cheat sheet
Every iframe attribute, every sandbox flag, every Permissions-Policy feature, every defense header — on one page. Bookmark-it reference, paste-ready snippets, no fluff.
8 min readQuestions.
Install the free Iframe Detector extension, open any page, and click the toolbar icon. Every iframe — visible, hidden, same-origin, cross-origin — is checked and listed instantly. No account, no setup.
Yes — it reads the DOM of whichever tab is active. No extra permissions beyond the current tab.
Yes. One-pixel trackers, display:none, and visibility:hidden frames all show up and are flagged.
A small heuristic flags frames loaded from known ad-tech and analytics domains. You can see the raw origin too.
Only anonymous, aggregate feature-usage events (e.g. which button was clicked). No URLs, no iframe contents, no page data — see the Privacy page.
Yes — the popup exposes JSON, CSV, and Markdown downloads that drop into most audit and ticketing tools directly.
Toggle "Allow in incognito" from chrome://extensions — the extension keeps the same zero-network stance there.
Ready to see every iframe?
Add to Chrome — freeEnjoying Iframe Detector?
It's free, ad‑free, and built in spare evenings. If it saved you time on a debug session, consider buying me a coffee — it keeps the project moving.