What technology does libpng.org use?

libpng.org is built with Nginx.

Is libpng.org secure (HTTPS)?

Yes. libpng.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 13, 2026.

Who hosts libpng.org?

libpng.org is hosted on LIGHTEDGE-AS-02 - LightEdge Solutions, US.

What is libpng.org's SEO score?

libpng.org scored 65/100 for SEO in the latest analysis (fair).

What is libpng.org's overall website score?

libpng.org has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.

libpng.org

libpng.org: top level

Last scanned Jul 21, 2026, 11:40 AM · 1 view

Overall score

Fair

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.
Missing viewport meta tag
Accessibility
Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
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.

Summary

This website uses Nginx hosted on LIGHTEDGE-AS-02 - LightEdge Solutions, US. SEO is fair (65/100) and accessibility is good (85/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

SEO

5 issue(s) found

100

Performance

248 ms

Security

HTTPS & header checks

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.

Technologies

Detected frameworks, languages, and tools.

Nginx

Hosting & CDN

Hosting provider: LIGHTEDGE-AS-02 - LightEdge Solutions, US
CDN provider: —
IP address: 204.68.111.101
ASN: AS11320 (LIGHTEDGE-AS-02 - LightEdge Solutions, US)

DNS records

Type	Value
A	204.68.111.101
AAAA	—
MX	—
TXT	—
NS	ns2.hover.com ns1.hover.com
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Let's Encrypt
Subject: secureprojects.sourceforge.net
Valid from: Jun 15, 2026
Valid to: Sep 13, 2026
Days until expiry: 54
SAN domains: amanda.org, bluefish.openoffice.nl, code.videlibri.de, community.jedit.org, extensions.openoffice.org, extensions.services.openoffice.org, exult.info, freecol.org, freeplane.org, gnomesubtitles.org, gparted.org, gphoto.com, gphoto.org, itksnap.org, jedit.org, libpng.com, libpng.org, linuxcommand.org, net-snmp.org, nsis.io, opencamera.org.uk, openjump.org, openocd.org, plugins.jedit.org, roundup-tracker.org, sbcl.org, secureprojects.sourceforge.net, swig.org, synoboost.com, templates.openoffice.org, templates.services.openoffice.org, update.apexdc.net, usermin.com, videlibri.de, webmin.com, wings3d.com, www.amanda.org, www.bluefish.openoffice.nl, www.exult.info, www.freecol.org, www.freeplane.org, www.gnomesubtitles.org, www.gphoto.com, www.gphoto.org, www.itksnap.org, www.jedit.org, www.libpng.com, www.libpng.org, www.linuxcommand.org, www.net-snmp.org, www.opencamera.org.uk, www.openjump.org, www.openocd.org, www.roundup-tracker.org, www.sbcl.org, www.swig.org, www.synoboost.com, www.usermin.com, www.videlibri.de, www.webmin.com, www.wings3d.com

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 1 · H2 1 · H3 0

Links

3 internal · 4 external · 1 broken

Images

5 total · 0 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 176 B

Page size

2.8 KB

Robots.txt & Sitemap

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

SEO issues

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

Scan details

Requested URL: https://libpng.org
Final URL: https://libpng.org
HTTP status: 200
HTTP version: HTTP/1.1
Response time: 248 ms
HTML size: 2.8 KB
Redirect chain: https://libpng.org

Same technology stack

mullvad.net

Mullvad VPN - Privacy is for the people

100

nginxsvelte

ESAB-AS - 31173 Services AB, SE

beebom.com

Beebom - Tech That Matters

100

wordpressnginxgoogle-analytics

flippingbook.com

FlippingBook | Flipbook Maker for Digital Publishing

100

nginxgoogle-analyticsgoogle-ads

AWS

fas.org

Home - Federation of American Scientists

100

wordpressnginxgoogle-analytics

AKAMAI-LINODE-AP - Akamai Connected Cloud, SG

pushwoosh.com

Mobile Push Notification Service | Pushwoosh

nginxastro

AWS· CloudFront

dnsimple.com

Reliable DNS Hosting and Domain Management with DNSimple

nginxtailwindcss

SERVERCENTRAL - DEFT.COM, US

Frequently asked questions

What technology does libpng.org use?: libpng.org is built with Nginx.
Is libpng.org secure (HTTPS)?: Yes. libpng.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 13, 2026.
Who hosts libpng.org?: libpng.org is hosted on LIGHTEDGE-AS-02 - LightEdge Solutions, US.
What is libpng.org's SEO score?: libpng.org scored 65/100 for SEO in the latest analysis (fair).
What is libpng.org's overall website score?: libpng.org has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.