pjsip.org
PJSIP - Open Source SIP, Media, and NAT Traversal Library
Last scanned Jul 26, 2026, 5:47 AM
Overall score
Fair
Summary
Professionally supported open source, portable, small footprint multimedia communication libraries written in C language for building portable VoIP applications. This website uses Nginx hosted on LEASEWEB-USA-SFO - Leaseweb USA, Inc., US. SEO is fair (70/100) and accessibility is fair (55/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
Professionally supported open source, portable, small footprint multimedia communication libraries written in C language for building portable VoIP applications. Includes implementation of SIP, RTP, STUN, TURN, and ICE. Available for Windows, Mac OS X, and many other systems.
- United States
- Hosted on LEASEWEB-USA-SFO - Leaseweb USA, Inc., US
Top issues to fix
13 issues found · 4 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+7 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
245 ms
Security
HTTPS & header checks
Accessibility
3 issue(s) found
Organization
Company details published in this site's own structured data.
Professionally supported open source, portable, small footprint multimedia communication libraries written in C language for building portable VoIP applications. Includes implementation of SIP, RTP, STUN, TURN, and ICE. Available for Windows, Mac OS X, and many other systems.
Meta tags
- Title
- PJSIP - Open Source SIP, Media, and NAT Traversal Library
- Description
- Professionally supported open source, portable, small footprint multimedia communication libraries written in C language for building portable VoIP applications. Includes implementation of SIP, RTP, STUN, TURN, and ICE. Available for Windows, Mac OS X, and many other systems.
- Canonical
- Language
- Charset
- utf-8
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- LEASEWEB-USA-SFO - Leaseweb USA, Inc., US
- CDN provider
- —
- IP address
- 23.108.108.200
- ASN
- AS7203 (LEASEWEB-USA-SFO - Leaseweb USA, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT |
|
| NS |
|
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Let's Encrypt
- Subject
- opal.pjsip.org
- Valid from
- May 31, 2026
- Valid to
- Aug 29, 2026
- Days until expiry
- 33
- SAN domains
- opal.pjsip.org, pjsip.org, www.pjsip.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 1 · H2 1 · H3 1
Links
11 internal · 6 external · 1 broken
Images
13 total · 7 missing alt
Scripts / Styles
2 scripts · 1 stylesheets
JS / CSS size
153 B · 4.8 KB
Page size
6.9 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 9
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://pjsip.org
- Final URL
- https://pjsip.org
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 245 ms
- HTML size
- 6.9 KB
- Redirect chain
- https://pjsip.org
See something wrong on this report? Request a correction
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Website Under Construction
Frequently asked questions
- What technology does pjsip.org use?
- pjsip.org is built with Google Analytics, Nginx.
- Is pjsip.org secure (HTTPS)?
- Yes. pjsip.org uses TLS 1.2 with a certificate issued by Let's Encrypt, valid until Aug 29, 2026.
- Who hosts pjsip.org?
- pjsip.org is hosted on LEASEWEB-USA-SFO - Leaseweb USA, Inc., US.
- What is pjsip.org's SEO score?
- pjsip.org scored 70/100 for SEO in the latest analysis (fair).
- What is pjsip.org's overall website score?
- pjsip.org has an overall SiteGraph score of 73/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card