Free SEO Chrome Extensions

Two MB Crawl Limit Monitor

Check pages against Google's 2MB crawl limit, free, right in your browser.

A free Chrome extension that finds pages on your site approaching or going over Google's real crawl size limit.

Download free (zip)How to install

Version 1.0.1 for Chrome, Edge and Brave. No account needed.

Two MB Crawl Limit Monitor showing the results of a scan
Two MB Crawl Limit Monitor after a scan of an example site.

Why this matters

Google's own documentation says Googlebot only reads the first 2MB of a page, and stops there. If your page is bigger than that, the rest simply never gets crawled or indexed. Most site owners have no idea how close their pages are to this limit. This tool measures the exact bytes a crawler would download, not the total weight of images and scripts a browser loads, and shows you which pages are at risk.

What it does

  • Detects your site automatically from the tab you have open, no typing needed
  • Scans your whole site in one click, up to 5,000 pages
  • Lets you set your own size budget in MB before scanning
  • Sorts every page into under budget, approaching budget, or over budget
  • Measures the real response size, the same bytes a search engine actually downloads
  • Handles JavaScript heavy pages by opening a hidden tab when needed, without changing how size is measured
  • Flags pages blocked by anti bot systems separately, so they do not throw off your numbers
  • Keeps running in the background even if you close the popup
  • Saves progress automatically, and lets you resume after closing the browser
  • Lets you export just one category or everything as an Excel file
  • Lets you export a full PDF report
  • Everything stays in your browser. Nothing is sent to any server
  • Completely free, no account and no activation code needed

How to install Two MB Crawl Limit Monitor

It takes about a minute. You only do this once.

  1. Download the zip file with the button on this page and unzip it. You will get a folder called two-mb-crawl-limit-monitor.
  2. Open the extensions page. In Chrome, type chrome://extensions in the address bar and press Enter. In Edge use edge://extensions, in Brave brave://extensions.
  3. Turn on Developer mode with the switch in the top right corner.
  4. Click Load unpacked and choose the unzipped folder (the one that contains manifest.json).
  5. Pin the icon from the puzzle piece menu in your toolbar, so it is always one click away.

Download Two MB Crawl Limit Monitor

Good to know

  • A normal scan covers up to 5,000 pages. Very large sites only get a partial map.
  • robots.txt is respected before a page is even fetched, so a huge blocked page never skews your results.
  • Pages that Google gives a bigger allowance to, like PDFs, get their own 64MB limit instead of 2MB.

What the permissions are for

Chrome shows these when you install. Here is what each one is used for.

storageSave your settings and scan results in your browser.
unlimitedStorageStore results for large sites with thousands of pages.
downloadsSave Excel and PDF reports to your computer.
tabsRead the address of the tab you have open, so it knows which site to scan.
scriptingRead links on pages that need JavaScript to show them.
Access to websitesLoad the pages of the site you scan, the same way a crawler does.

Questions

Is Two MB Crawl Limit Monitor free?

Yes. It is free to download and use, and the code is open source under the MIT license. You do not need an account, a subscription or an activation code.

Where are my results stored?

Your scan results and settings are saved in your own browser. The extension does not ask you to sign in, and you can delete everything by removing the extension.

Which browsers does it work in?

Google Chrome, and other browsers built on Chromium such as Microsoft Edge and Brave.

Does the 2MB limit include images and scripts?

No. The limit is about the HTML file itself, the bytes Googlebot downloads for the page. This tool measures exactly that, not the full weight a browser loads.

How do I update it?

Download the latest zip from this page, replace the old folder with the new one, and click the reload button on the extensions page.

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