Website SEO Checker icon

Website SEO Checker

by Boosta Inc OÜ · sitechecker.pro · Developer Tools
FeaturedEstablished publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Get free on-page SEO report by 100+ parameters with the best website SEO checker

Users
200K
+100K in 30 days
Rating
4.7 / 5
+0.09 in 30 days
Ratings
220
0 in 30 days
Store rank
#1,270
#1,146 among extensions
Version
4.4.1
updated 20 Mar 2026

Users

monthly, 3 years
30K115K200KAug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 200,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
10116222Aug 2023Apr 2025Oct 2026
Latest, 15 Oct 2026: 220 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 Website SEO Checker

☑️ Overview – quickly check essential SEO data: URL structure, metadata, indexation, and canonical settings. ☑️ Content – analyze headings, keyword density, text length, and text-to-code ratio for better structure. ☑️ Links – identify external, internal, and subdomain links, plus dofollow/nofollow status and anchor text. ☑️ Hreflangs – instantly verify hreflang setup and language targeting for international SEO. ☑️ Images – detect missing alt/title tags, broken images, and check sizes with on-page highlighting. ☑️ Structured Data – instantly identify and validate Schema.org markup for better SEO performance. ☑️ PageSpeed – measure mobile and desktop performance with actionable optimization insights. ☑️ GSC+GA4 Insights – assess search performance & indexing plus user behavior and conversion metrics. ☑️ Issues & Monitoring – detect SEO issues, track technical changes, and monitor page updates over time. Deep dive into Sitechecker Chrome Extension’s capabilities to unlock the full potential of your SEO workflow. 1️⃣ Get a quick technical overview of any page to ensure it meets SEO best practices. • Inspect URL structure, status code, and page size. • Review meta title, description, and H1 heading. • Analyze indexation settings, including robots meta tags, X-Robots-Tag directives, and robots.txt rules. • Validate canonical tag settings to prevent duplicate content issues. 2️⃣ Analyze content structure to improve keyword relevance and readability. • Review heading hierarchy (H1–H6) and highlight them on the page. • Copy the entire heading structure in one click for easy documentation. • Measure text length in words and characters. • Calculate text-to-code ratio to optimize content efficiency. • Get keyword density insights for single, two, and three-word phrases. 3️⃣ Audit all links on a page to improve internal linking and track external references. • Detect external, internal, and subdomain links. • Check dofollow/nofollow status and analyze HTTP response codes. • Review anchor text usage and link destinations. • Search for specific links and highlight them directly on the page. • Copy all detected links in one click for easy analysis and outreach. 4️⃣ Ensure proper hreflang implementation for international SEO. • Detect missing or incorrect hreflang attributes. • Validate language targeting and regional settings. • Check backward links to confirm proper hreflang setup. 5️⃣ Optimize images to improve SEO and user experience. • Identify missing alt and title attributes. • Detect broken images and oversized files. • Highlight image details directly on the page for easy fixes. 6️⃣ Validate structured data for better search visibility. • Detect Schema.org markup and review structured data implementation. • Identify missing or incorrect structured data elements. • Ensure key rich snippet attributes are correctly applied. 7️⃣ Measure page speed and get actionable insights for optimization. • Check page loading speed for desktop and mobile. • Identify slow-loading elements affecting performance. • Get recommendations to improve Core Web Vitals. 8️⃣ Unlock real-time GSC + GA4 insights to track performance, user behavior, and conversions. • View clicks, impressions, CTR, and average position over 7/30/60/90 days. • Analyze top search queries and how they drive traffic. • Inspect URL crawling, indexing status, and mobile usability issues. • Measure user behavior with engagement metrics like bounce rate and average session duration. • Track conversions with key events and key event rate. • Break down performance by traffic source (Google Organic, Direct, Social, Bing, etc.). 9️⃣ Monitor SEO issues and track page changes over time. • Detect technical errors, broken links, and missing metadata. • Track content updates and structural modifications. • Get alerts for critical SEO changes.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%0+0.09
30 days+100K+100.0%0+0.09
6 months+100K+100.0%−1+0.08
1 year+100K+100.0%+8+0.08

Chrome Web Store search rankings

Where Website SEO Checker appears when people search the store, with the 30 day change
Search phrasePosition30 days
seo#60
website#8−5
content optimization#10−6
website usage#25−13
checker#35−30
identify#44−27
analyze#60−51
performance#79−68
user experience#79−56
optimize#82−59
detect#87−69
improve#92−60
broken links#96−33
traffic#100−76

Version history

26 versions recorded
4.4.120 Mar 2026
4.3.48 Jan 2026
4.2.624 Sep 2025
4.2.123 May 2025
4.2.019 May 2025
4.1.52 May 2025
4.1.310 Mar 2025
4.1.228 Feb 2025

Details

Category
Developer Tools
First seen
23 Jul 2020
Size
738 KB
Languages
de, en, nl, es, fr, it, no, pt-BR
Pricing
Free
Privacy policy
sitechecker.pro
Support
help.sitechecker.pro
Extension ID
nljcdkjpjnhlilgepggmmagnmebhadnk

Permissions and risk

Minimal riskimpact 2, likelihood 0
Permissions
activeTabstorageidentity

Alternatives to Website SEO Checker

Extensions that rank for the same store searches or share the Developer Tools category, ordered by users