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SGSiteGraph

slf4j.org

SLF4J

Last scanned Aug 24, 2026, 1:22 PM

71

Overall score

Fair

Summary

This website uses Apache hosted on AS-HOSTINGER - Hostinger International Limited, CY. SEO is fair (50/100) and accessibility is good (75/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

LT
Hosted on AS-HOSTINGER - Hostinger International Limited, CY

Top issues to fix

12 issues found · 4 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • 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.

+6 more issues — details in the sections below.

50

SEO

7 issue(s) found

100

Performance

121 ms

65

Security

HTTPS & header checks

75

Accessibility

2 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Meta tags

Title
SLF4J
Description
Canonical
Language
en
Charset
UTF-8
Viewport
width=device-width, initial-scale=1
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

jQueryApache

Hosting & CDN

CDN provider
—
IP address
31.97.181.89
ASN
AS47583 (AS-HOSTINGER - Hostinger International Limited, CY)

DNS records

TypeValue
A
  • 31.97.181.89
AAAA
  • 2a02:4780:41:4ae9::1
MX—
TXT—
NS
  • fran1.qos.ch
  • exo1.slf4j.org
CAA—
CNAME—
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
www.slf4j.org
Valid from
Aug 15, 2026
Valid to
Nov 13, 2026
Days until expiry
80
SAN domains
slf4j.org, www.slf4j.org

Security headers

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

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 1 · H3 1

Links

28 internal · 4 external · 0 broken

Images

4 total · 1 missing alt

Scripts / Styles

8 scripts · 6 stylesheets

JS / CSS size

226 KB · 114 KB

Page size

1.9 KB

Robots.txt & Sitemap

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

SEO issues

  • Missing meta description
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • More than 20% of images are missing alt text
  • No H1 heading found

Scan details

Requested URL
https://slf4j.org
Final URL
https://slf4j.org
HTTP status
200
HTTP version
HTTP/1.1
Response time
121 ms
HTML size
1.9 KB
Redirect chain
https://slf4j.org

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does slf4j.org use?
slf4j.org is built with jQuery, Apache.
Is slf4j.org secure (HTTPS)?
Yes. slf4j.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Nov 13, 2026.
Who hosts slf4j.org?
slf4j.org is hosted on AS-HOSTINGER - Hostinger International Limited, CY.
What is slf4j.org's SEO score?
slf4j.org scored 50/100 for SEO in the latest analysis (fair).
What is slf4j.org's overall website score?
slf4j.org has an overall SiteGraph score of 71/100, combining SEO, performance, security, and accessibility.