What technology does w3schools.com use?

We did not detect any specific technologies for w3schools.com in the latest scan.

Is w3schools.com secure (HTTPS)?

Yes. w3schools.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 25, 2026.

Who hosts w3schools.com?

Hosting provider information for w3schools.com is not available yet.

What is w3schools.com's SEO score?

w3schools.com scored 65/100 for SEO in the latest analysis (fair).

What is w3schools.com's overall website score?

w3schools.com has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.

Has w3schools.com's score changed over time?

w3schools.com's overall score has declined by 2 points (from 85 to 83) since Jul 18, 2026.

w3schools.com

W3Schools Online Web Tutorials

Last scanned Jul 29, 2026, 1:00 PM · 8 views

Overall score

Great

Summary

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more. SEO is fair (65/100) and accessibility is excellent (100/100). Security scores good (75/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

Top issues to fix

10 issues found · 1 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing X-Content-Type-Options header
Security
Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
Security
Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEO
Trim the meta description to under 160 characters to avoid truncation in search results.
Missing canonical link
SEO
Add <link rel="canonical"> so search engines know which URL variant to index.
Multiple H1 headings found
SEO
Keep a single H1 per page and demote the others to H2/H3.

+4 more issues — details in the sections below.

SEO

6 issue(s) found

100

Performance

137 ms

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Score history

-2 overall since Jul 18, 2026

Overall: 83
SEO: 65
Security: 75
Performance: 100
Accessibility: 100

Organization

Company details published in this site's own structured data.

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

YouTube LinkedIn Facebook Instagram

Contact

Email, phone, and address published on this site's own pages.

Email: help@w3schools.com sales@w3schools.com

Meta tags

Title: W3Schools Online Web Tutorials
Description: Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
Canonical
Language: en-US
Charset: utf-8
Viewport: width=device-width, initial-scale=1
Robots meta
Manifest: https://www.w3schools.com:443/site.webmanifest

Technologies

Detected frameworks, languages, and tools.

No technologies detected.

Hosting & CDN

Hosting provider: —
CDN provider: —
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: certification.w3schools.com
Valid from: Jul 27, 2026
Valid to: Oct 25, 2026
Days until expiry: 87
SAN domains: certification.w3schools.com, kte9uk46s.w3schools.com, localdev.w3schools.com, ssf18kfg1.w3schools.com, try.w3schools.com, tryit.w3schools.com, tryphp.w3schools.com, www.w3schools.com

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyEnabled
X-Frame-OptionsMissing
X-Content-Type-OptionsMissing
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 18 · H2 65 · H3 7

Links

113 internal · 71 external · 20 broken

Images

21 total · 0 missing alt

Scripts / Styles

21 scripts · 6 stylesheets

JS / CSS size

25.8 KB · 21.2 KB

Page size

240 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

Meta description longer than 160 characters
Missing canonical link
Multiple H1 headings found
No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://w3schools.com
Final URL: https://www.w3schools.com:443/
HTTP status: 200
HTTP version: HTTP/2
Response time: 133 ms
HTML size: 240 KB
Redirect chain: https://w3schools.com → https://www.w3schools.com:443/

See something wrong on this report? Request a correction

Frequently asked questions

What technology does w3schools.com use?: We did not detect any specific technologies for w3schools.com in the latest scan.
Is w3schools.com secure (HTTPS)?: Yes. w3schools.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 25, 2026.
Who hosts w3schools.com?: Hosting provider information for w3schools.com is not available yet.
What is w3schools.com's SEO score?: w3schools.com scored 65/100 for SEO in the latest analysis (fair).
What is w3schools.com's overall website score?: w3schools.com has an overall SiteGraph score of 83/100, combining SEO, performance, security, and accessibility.
Has w3schools.com's score changed over time?: w3schools.com's overall score has declined by 2 points (from 85 to 83) since Jul 18, 2026.