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opus-codec.org

https://opus-codec.org· First analyzed 30 Apr 2026· Updated 30 Apr 2026
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opus-codec.org
Desktop screenshot of opus-codec.org
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Mobile

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Hosting Provider

University of Oregon

IP Address

140.211.167.215

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Corvallis, United States

ASN

AS3701

Organization

University of Oregon

Server

Nginx

Nameservers

ns2.xiph.org.ns1.xiph.org.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
560 ms10%
Speed Index
728 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
457 KB
7 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
University of Oregon

Technology Stack

1 Technologies Detected

Web Servers

1
Nginx

SEO Analysis

D59/100
16
8
0
Meta Tags9/15
Content10/12
Headings8/8
Technical11/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
O
opus-codec.orgopus-codec.org

Opus Codec

Opus, the open standard, high quality codec. Presentation, documentation, comparison with other formats, download links, source code repository.

Title Length10 chars

Recommended: 50-60 chars (~64px / 580px)

Description Length145 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    3/100
    Poor
    1 14 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D46/100
    Bot Access
    20/25
    Machine Read.
    17/25
    Schema Data
    0/25
    Citation
    9/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    code blocksnavheader/footer
    Text ratio:42%
    Words:447
    Token eff.:Optimal
    Sections/1K:15.7
    Depth:3/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary55w
    Descriptive Headingsavg 1.6w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    B
    79/100
    11
    Passed
    3
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    3/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 recommendations
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    57/100
    A
    57 mg
    CO₂e / view
    457.0 KB
    Page Weight
    90%
    Cleaner Than
    New Visitor
    65 mg
    vs
    Returning (cached)
    32 mg
    Annual (10K/mo)
    6.8 kg
    Emission Segments
    Data Center
    13 mg
    Network
    14 mg
    Device
    30 mg
    Resource Breakdown
    Images
    9.5 KB
    CSS
    444.2 KB
    HTML
    3.3 KB
    Green Hosting Not Verified
    University of Oregon
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    76%Good
    Static / Informational

    HTTPS

    No WAF

    51d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    22.03.2026

    Valid Until

    20.06.2026

    Subject Alternative Names (2)

    opus-codec.orgwww.opus-codec.org

    SHA-256 Fingerprint

    F1:DE:78:A2:A4:49:BD:91:1A:21:EE:39:E3:98:E8:48:87:0C:1E:D2...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html
    date
    Thu, 30 Apr 2026 08:46:03 GMT
    etag
    W/"69687ee9-1dd3"
    last-modified
    Thu, 15 Jan 2026 05:45:13 GMT
    server
    nginx
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    0

    SPF
    DKIM
    DMARC

    Domain Information

    opus-codec.org

    Domain Age
    15y 6m

    Created

    15.10.2010

    Expires

    15.10.2026

    Last Updated

    02.04.2026

    Registrar

    Domain.com - Network Solutions, LLC

    DNSSEC
    Not Enabled

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    D
    54/100
    Mobile Friendly1 breakpoint
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Open Sans

    WCAG Partial
    72/100
    Readability
    /30
    24/30

    16px · LH --

    Hierarchy
    /20
    18/20

    2x ratio · ✓ H1→H6

    WCAG
    /25
    17/25

    2.19:1 min contrast

    Performance
    /25
    13/25

    1 font · 2 req

    Heading Font

    Open Sans

    Sans32px

    Body Font

    Open Sans

    Sans16px

    Contrast Ratio

    2.19:1

    16 issues

    Reading Comfort

    ~69 CPL

    Optimal (45–75)
    32px
    h1
    28px
    h2
    24px
    h3
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ✅ Optimal line length: ~69 chars/line (ideal 45–75 CPL).

    ⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 16 elements below WCAG AA threshold (min 2.2:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 2.0x larger than body text.

    Buy on MyFontsFlesch 41

    Color Palette

    8 unique colors
    4.88:1 AA Light
    #ffffff
    Background· 85.89999999999999%
    #717171
    Other· 1.7%
    #e2eced
    Primary· 1.9%
    #c1d3d8
    Secondary· 1.2%

    Sponsored

    Scripts & Styles

    2 Resources

    0
    Scripts
    2
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    Website Identity

    opus-codec.org

    15 years old
    Location detected: 🇺🇸 United Statesvia ip
    Domain.com - Network Solutions, LLC

    Sponsored

    Last analyzed: 30 Apr 2026 at 08:46

    Historical Analysis & Change Tracking