Identify SEO signals added, removed, or altered in page HTML during JavaScript rendering — without digging into the code.
Users
2,000
0 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
21
0 in 30 days
Store rank
#20K
#17K among extensions
Version
1.3
updated 18 Sep 2025
Users
monthly, 15 months
Latest, 15 Oct 2026:2,000 usersMove the mouse over the chart for any month
Ratings count
monthly, 15 months
Latest, 15 Oct 2026:21 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Rendering Difference Engine
🔍 The Rendering Difference Engine highlights discrepancies between response HTML and rendered HTML. No more searching for the needle in your haystack.
→ Findings are grouped and reported based on elements that impact how search engines crawl, understand, and index the URL.
→ An intuitive, at-a-glance interface includes unique tabs for each SEO factor, showing exactly what changed:
⚙️ Crawling, Indexing, & Metadata
🔠 Headings
🔗 Links
🌅 Media
📄 Page copy
→ The “Difference” tab shows the rendered HTML and highlights any differences.
→ You can export code and page copy, as well as highlight impacted links and media directly on the webpage.
💪 Use the findings to facilitate a JavaScript audit and clearly document JS SEO issues for decision makers and developers.
Feedback:
If you think The Rendering Difference Engine is awesome, help us get the word out by rating it five starts. We welcome your suggestions, requests, and experiences at hello@thegray.company.
Privacy:
Once the extension is enabled in Chrome, there’s no need to grant any additional permissions. The Rendering Difference engine does not collect or store personal data, or any other data, from the webpages you browse.
Growth
Window
Users
Change
Ratings
Rating
7 days
0
+0.0%
0
0.00
30 days
0
+0.0%
0
0.00
6 months
0
+0.0%
0
0.00
1 year
+1,000
+100.0%
+7
0.00
Chrome Web Store search rankings
Where Rendering Difference Engine appears when people search the store, with the 30 day change