Nmap.org - SEO Checker

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Overview of the SEO Check
Meta information
100% 
Page quality
77% 
Page structure
100% 
Link structure
65% 
Server
31% 
External factors
100% 
SEO Score
Response time
1.14 s
File size
19.20 kB
Words
1285
Media files
9
Number of links
63 internal / 55 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
Nmap: the Network Mapper - Free Security Scanner
The length of the page title is perfect. (464 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
The length of the meta description is perfect. (906 pixels out of 1000 max pixel length)
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
https://nmap.org/
There is a valid canonical link specified.
Language
(Somewhat important)
Language detected in text: en
Language defined in HTML: en
Server location: United States of America
The following language is defined by HTML: en
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
The doctype HTML 5 is set correctly.
The doctype is placed at first in the HTML code.
Favicon
(Nice to have)
The favicon is linked correctly.

Meta tags

NameValue
descriptionNmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
keywordsNmap,Security Scanner,Port Scanner,Network Security,Hacking
viewportwidth=device-width,initial-scale=1
theme-color#2A0D45
ROBOTSNOARCHIVE
langen

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Page quality

Content
(Critically important)
This page contains 1285 words. That's ok.
34.5% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
27 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 16.63 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No Apple touch icon is specified.
A viewport "width=device-width,initial-scale=1" is provided.
This page only loads 1 JavaScript files. That's good!
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 26 tags for this page.
Image SEO
(Somewhat important)
8 images have no alt attribute. The content of alt attributes is used by search engines.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

URLAlt attributeTitle
/shared/images/nst-icons.svgNo alt attribute provided
/shared/images/nst-icons.svgNo alt attribute provided
https://nmap.org/images/sitelogo.pngHome page logo
/shared/images/nst-icons.svgNo alt attribute provided
/shared/images/nst-icons.svgNo alt attribute provided
/shared/images/nst-icons.svgNo alt attribute provided
/shared/images/nst-icons.svgNo alt attribute provided
/shared/images/nst-icons.svgNo alt attribute provided
/shared/images/nst-icons.svgNo alt attribute provided

Page structure

H1 heading
(Critically important)
Nmap: Discover your network
The H1 heading is perfect.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 Nmap: Discover your network
H2 News
H2 Communication
H2 Nmap Security Scanner
H2 Npcap packet capture
H2 Security Lists
H2 Security Tools
H2 About
Some anchor texts are used more than once.
There are 1 links with a trivial anchor text.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (55) on this page.

Found links on this page

LinkAttributesAnchor text
https://nmap.org/Anchor No Text
https://nmap.org/IMG-ALT Home page logo
https://nmap.org/Nmap.org
https://npcap.com/External Npcap.com
https://seclists.org/External Seclists.org
https://sectools.org/External Sectools.org
https://insecure.org/External Insecure.org
https://nmap.org/download.htmlDownload
https://nmap.org/book/man.htmlReference Guide
https://nmap.org/book/Book
https://nmap.org/docs.htmlDocs
https://nmap.org/zenmap/Zenmap GUI
https://nmap.org/movies/In the Movies
https://nmap.org/downloadGet Nmap 7.95 here
https://npcap.com/External Text duplicate Npcap.com
https://seclists.org/External Text duplicate Seclists.org
https://insecure.org/External Text duplicate Insecure.org
https://sectools.org/External Text duplicate Sectools.org
https://seclists.org/nmap-anno...External Release Announcement
https://nmap.org/download.htmlDownload page
https://seclists.org/nmap-anno...External Text duplicate Release Announcement
https://nmap.org/npcap/Text duplicate Download page
https://seclists.org/nmap-anno...External release notes
https://nmap.org/download.htmldownload
https://nmap.org/p51-11.htmlthe original Phrack #51 article
https://twitter.com/hashtag/Nm...External #Nmap20
https://seclists.org/nmap-anno...External Text duplicate release notes
https://nmap.org/download.htmlText duplicate download
https://nmap.org/7/Text duplicate release notes
https://nmap.org/download.htmlText duplicate download
https://nmap.org/favicon/Icons of the Web
https://nmap.org/movies/hack Matt Damon's brain in Elysium
https://nmap.org/movies/launch nuclear missiles in G.I. Joe: Retaliation
https://nmap.org/book/nse.htmlNSE scripts
/book/osdetect.htmlOS
https://nmap.org/book/vscan.htmlversion detection
https://seclists.org/nmap-anno...External Announcement/Details
https://nmap.org/download.htmlDownload Site
https://seclists.org/nmap-hack...External Text duplicate Announcement/Details
https://nmap.org/download.htmlText duplicate Download Site
https://seclists.org/nmap-hack...External Nmap 6.01
https://nmap.org/6/Text duplicate release notes
https://nmap.org/download.htmlText duplicate download
https://sectools.org/External SecTools.Org
https://sectools.org/tag/new/External 49 new tools
https://seclists.org/nmap-hack...External Nmap 5.50 Released
https://nmap.org/downloadText duplicate Download page
https://seclists.org/nmap-hack...External Release notes
/presentations/BHDC10/Presentation video
https://nmap.org/faviconnew poster and online viewer
https://nmap.org/5/Nmap Security Scanner version 5.00
https://nmap.org/5/top 5 improvements in Nmap 5
https://nmap.org/book/Nmap Network Scanning: The Official Nmap Project Guide to Network Discovery and Security Scanning
http://facebook.com/nmapExternal Facebook page
http://twitter.com/nmap/External Twitter feed
https://nmap.org/Anchor mailing lists
https://nmap.org/npsl/free and open source
https://nmap.org/zenmap/Zenmap
https://nmap.org/ncat/Ncat
https://nmap.org/ndiff/Ndiff
https://nmap.org/nping/Nping
https://nmap.org/movies/twelve movies
https://nmap.org/movies/The Matrix Reloaded
https://nmap.org/movies/Die Hard 4
https://nmap.org/movies/Girl With the Dragon Tattoo
https://nmap.org/movies/The Bourne Ultimatum
/book/man-port-scanning-techni...port scanning
/book/osdetect.htmlOS detection
https://nmap.org/book/vscan.htmlText duplicate version detection
https://nmap.org/docs.htmldocumentation page
https://nmap.org/download.htmlfree download
https://nmap.org/data/COPYINGlicense
https://nmap.org/docs.htmlTrivial anchor text
here
https://nmap.org/Anchor Nmap mailing lists
https://seclists.org/nmap-devExternal nmap-dev list
/book/man-bugs.htmlguidelines
https://seclists.org/nmap-hackersExternal nmap-hackers
http://facebook.com/nmapExternal Facebook
http://twitter.com/nmapExternal Twitter
http://freenode.net/External Freenode
http://www.efnet.org/External Subdomain EFNet
/nmap_inthenews.htmlpress page
/mailman/listinfo/announceNmap-hackers list info page
/mailman/listinfo/devNmap-dev list info page
https://seclists.org/External Text duplicate Seclists.org
http://freenode.net/External Text duplicate Freenode
https://nmap.org/Nmap Security Scanner
https://nmap.org/book/man.htmlRef Guide
/book/install.htmlInstall Guide
https://nmap.org/docs.htmlText duplicate Docs
https://nmap.org/download.htmlText duplicate Download
https://nmap.org/oem/Nmap OEM
https://npcap.com/External Npcap packet capture
https://npcap.com/guide/External User's Guide
https://npcap.com/guide/npcap-...External Anchor API docs
https://npcap.com/External Anchor Text duplicate Download
https://npcap.com/oem/External Npcap OEM
https://seclists.org/External Security Lists
https://seclists.org/nmap-anno...External Nmap Announce
https://seclists.org/nmap-dev/External Nmap Dev
https://seclists.org/fulldiscl...External Full Disclosure
https://seclists.org/oss-sec/External Open Source Security
https://seclists.org/dataloss/External BreachExchange
https://sectools.org/External Security Tools
https://sectools.org/tag/vuln-...External Vuln scanners
https://sectools.org/tag/pass-...External Password audit
https://sectools.org/tag/web-s...External Web scanners
https://sectools.org/tag/wirel...External Wireless
https://sectools.org/tag/sploits/External Exploitation
https://insecure.org/External About
https://insecure.org/fyodor/External About/Contact
https://insecure.org/privacy.htmlExternal Privacy
https://insecure.org/advertisi...External Advertising
https://nmap.org/npsl/Nmap Public Source License
https://twitter.com/nmapExternal A-TITLE Visit us on Twitter
https://facebook.com/nmapExternal A-TITLE Visit us on Facebook
https://github.com/nmap/External A-TITLE Visit us on Github
https://reddit.com/r/nmap/External A-TITLE Discuss Nmap on Reddit

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://nmap.org/"
HTTP header
(Important)
The HTML page should be transferred using GZip compression.
The web server version is sent within the HTTP header.
No X-Powered HTTP header is sent.
Performance
(Somewhat important)
The page response time is slow (1.14 seconds). The response time should be less than 0.4 seconds. Slow websites are bad for search engine bots and also result in bad user experience.
This page only loads 3 CSS files. That's ok.
This page only loads 1 JavaScript files. That's good!
The file size of the HTML document is fine (19 kB).

HTTP Response Header

NameValue
dateThu, 03 Apr 2025 15:12:46 GMT
serverApache/2.4.6 (CentOS)
strict-transport-securitymax-age=31536000; preload
varyHost
accept-rangesbytes
transfer-encodingchunked
content-typetext/html; charset=utf-8
statuscode200
http_versionHTTP/1.1

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 14,036 referring domains.
This page has 3,509,622 backlinks.
This page has backlinks from 9,100 different ip addresses.

Links from Wikipedia

You can find more links using Wikipedia search

Robots.txt

# We don't block any particular robot software in robots.txt, as we
# judge them by behavior rather than name. Abusive IPs which make
# hundreds of requests in a short period of time will be IP banned.
User-agent: *
Disallow: /favicon/*/

# Disallow crawling search results (search page itself is ok)
Disallow: /search.html?*
Disallow: /search/?*
# Request that robots don't download our releases, but they can view the index.
#Disallow: /dist/
#Allow: /dist/$
#Disallow: /dist-old/
#Allow: /dist-old/$

# Mailman
Allow: /mailman/listinfo/
Disallow: /mailman/

Sitemap: https://nmap.org/sitemap.xml.gz

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Search preview

nmap.org
Nmap: the Network Mapper - Free Security Scanner
Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
Nmap89%Check
Nmap Security76%Check
network73%Check
Nmap Security Scanner71%Check
Network Security70%Check
security65%Check
Security Scanner65%Check
Free Security Scanner65%Check
Nmap Project63%Check
free62%Check
Show more keywords and terms

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