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masteringjs.io

Registered
Screenshot masteringjs.io
Website screenshot
Page analyze update date: 2026/02/23 23:48:37
Last whois update date: 2026/07/16 03:17:46
Domain Status
Registered
Paid till
26.02.2027
Available from
28.03.2027
SEO Score
43.15%
63
Score achieved
146
Maximum score

Main Information

ℹ️
Title: Mastering JS
Description: Bite-sized full stack JavaScript tutorials for pragmatic developers that get things done
Keywords: empty
Page Encoding: unknown Body and server charset are different!
Page Filesize: 15 KB

Server Information

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IP: 216.198.79.1
Location: United States,US,37.751,-97.822,America/Chicago
Http Server: vercel
Encoding: utf-8

Meta Tags List

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Internal Links

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External Links

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Whois Information

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domain_name: masteringjs.io
domain_id: REDACTED
update_date: 2026-02-16T18:36:10Z
update_time: 1771266970
creation_date: 2019-02-26T17:57:13Z
creation_time: 1551203833

Whois Raw Data

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            Domain Name: masteringjs.io
Registry Domain ID: REDACTED
Registrar WHOIS Server: whois.rrpproxy.net
Registrar URL: http://key-systems.net
Updated Date: 2026-02-16T18:36:10Z
Creation Date: 2019-02-26T17:57:13Z
Registry Expiry Date: 2027-02-26T17:57:13Z
Registrar: Key-Systems GmbH
Registrar IANA ID: 269
Registrar Abuse Contact Email: [email protected]
Registrar Abuse Contact Phone: +49.68949396850
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED
Registrant Name: REDACTED
Registrant Organization: c/o whoisproxy.com
Registrant Street: REDACTED
Registrant City: REDACTED
Registrant State/Province: VA
Registrant Postal Code: REDACTED
Registrant Country: US
Registrant Phone: REDACTED
Registrant Phone Ext: REDACTED
Registrant Fax: REDACTED
Registrant Fax Ext: REDACTED
Registrant Email: REDACTED
Registry Admin ID: REDACTED
Admin Name: REDACTED
Admin Organization: REDACTED
Admin Street: REDACTED
Admin City: REDACTED
Admin State/Province: REDACTED
Admin Postal Code: REDACTED
Admin Country: REDACTED
Admin Phone: REDACTED
Admin Phone Ext: REDACTED
Admin Fax: REDACTED
Admin Fax Ext: REDACTED
Admin Email: REDACTED
Registry Tech ID: REDACTED
Tech Name: REDACTED
Tech Organization: REDACTED
Tech Street: REDACTED
Tech City: REDACTED
Tech State/Province: REDACTED
Tech Postal Code: REDACTED
Tech Country: REDACTED
Tech Phone: REDACTED
Tech Phone Ext: REDACTED
Tech Fax: REDACTED
Tech Fax Ext: REDACTED
Tech Email: REDACTED
Name Server: ns-cloud-c1.googledomains.com
Name Server: ns-cloud-c2.googledomains.com
Name Server: ns-cloud-c3.googledomains.com
Name Server: ns-cloud-c4.googledomains.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://icann.org/wicf/
>>> Last update of WHOIS database: 2026-07-16T03:17:45Z

SEO Audit

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Technical SEO

Response Code
200
Status 200 OK - page loads correctly.
!
Character Encoding
Page: , Header: utf-8
Character encoding mismatch between HTML and HTTP headers.
Page Size
16305 bytes
Page size acceptable for fast loading.
Resources
18 total
Optimal number of resources.
Hreflang Tags
0 hreflang tags
Add hreflang tags if you have multilingual content.
!
Robots.txt
Missing
Add robots.txt file to control search engine crawling.
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Sitemap
Not found
Add sitemap.xml and reference it in robots.txt.
HTTPS
Yes
Secure HTTPS connection enabled.
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Compression
br
Enable gzip or zstd compression to reduce file sizes.
Caching
public, max-age=0, must-revalidate
Cache-control headers properly set.
Page Speed
4.55 ms
Excellent loading speed.

On-Page SEO

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Title
Mastering JS
Title too short. Expand to 30-60 characters for better SEO.
!
Meta Description
Bite-sized full stack JavaScript tutorials for pragmatic developers that get things done Lenght:88
Meta description too short. Expand to 100-160 characters.
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H1 Heading
3 found - "What Do You Want to Learn?"
Use only one H1 heading per page. Remove extra H1 tags.
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Word Count
315
Content somewhat short. Expand to 500+ words for optimal SEO.
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Canonical Tag
Add canonical tag to prevent duplicate content issues.
Duplicate Meta
[]
No duplicate meta tags found.
Keywords
empty
Meta keywords set (note: not used by major search engines).

Content and UX

Language
en
Language attribute properly set.
!
Images
11 total, 1 missing ALT
Add ALT text to images for accessibility and SEO.
Viewport
width=device-width, initial-scale=1.0001, minimum-scale=1.0001, maximum-scale=1.0001, user-scalable=no
Viewport meta tag properly set for mobile devices.
!
Open Graph
Missing: og:url
Add missing OpenGraph tags for social media sharing: og:url
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Structured Data
0 JSON-LD scripts
Add structured data (JSON-LD) for rich snippets and better SEO.

Positions in Google

Search Phrases - Google

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Position Phrase Page Snippet
8autocopy.js/tutorials/fundament...
21ignore line/tutorials/eslint/ig...
29javascript class method/tutorials/fundament...

Additional Services

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