StackOptic
Back to Search
science.gov favicon

science.gov

https://science.gov· First analyzed 26 Apr 2026· Updated 26 Apr 2026
Export
science.gov
Desktop screenshot of science.gov
Mobile screenshot of science.gov
Mobile

Sponsored

Hosting Provider

Department of Energy, Office of Scientific and Technical Information

IP Address

192.107.175.71

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Oak Ridge, United States

ASN

AS293

Organization

Department of Energy, Office of Scientific and Technical Information

Server

Apache

Nameservers

edns1.ultradns.com.edns1.ultradns.net.edns1.ultradns.org.edns1.ultradns.biz.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
514 ms10%
Speed Index
668 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
453 KB
26 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Department of Energy, Office of Scientific and Technical Information

Technology Stack

4 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Apache

SEO Analysis

D56/100
17
7
0
Meta Tags9/15
Content6/12
Headings8/8
Technical13/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile2/4
Indexability3/3
S
science.govscience.gov

Science.gov

Science.gov is a gateway to government science information provided by U.S. Government science agencies, including research and development results.

Title Length11 chars

Recommended: 50-60 chars (~63px / 580px)

Description Length148 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    12 rules

    Allows all crawlers

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 2

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

    Sponsored

    AI & LLM Readiness

    F34/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    0/25
    Citation
    7/25

    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
    navheader/footer
    Text ratio:10%
    Words:104
    Token eff.:Too Short
    Sections/1K:9.6
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary13w
    Descriptive Headingsavg 3w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    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.
    A
    80/100
    11
    Passed
    1
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    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
    1/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •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.
    49/100
    A
    56 mg
    CO₂e / view
    452.9 KB
    Page Weight
    90%
    Cleaner Than
    New Visitor
    64 mg
    vs
    Returning (cached)
    32 mg
    Annual (10K/mo)
    6.7 kg
    Emission Segments
    Data Center
    13 mg
    Network
    13 mg
    Device
    30 mg
    Resource Breakdown
    Images
    71.4 KB
    CSS
    373.7 KB
    HTML
    7.7 KB
    Green Hosting Not Verified
    Department of Energy, Office of Scientific and Technical Information
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    46%Poor
    Interactive

    HTTPS

    No WAF

    158d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Sectigo Limited

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    17.03.2026

    Valid Until

    01.10.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    *.science.govscience.gov

    SHA-256 Fingerprint

    6F:60:5D:7A:10:DD:D9:1D:B8:77:64:73:49:99:AB:E8:FC:DB:1D:E4...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    connection
    Keep-Alive
    content-type
    text/html; charset=ISO-8859-1
    date
    Sun, 26 Apr 2026 18:10:44 GMT
    keep-alive
    timeout=5, max=100
    last-modified
    Wed, 30 Apr 2025 11:29:06 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    75

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (2)

    mxb-001d2d01.gslb.gpphosted.com
    mxa-001d2d01.gslb.gpphosted.com

    Domain Information

    science.gov

    Domain Age
    26y 2m

    Created

    17.02.2000

    Expires

    11.08.2026

    Last Updated

    16.08.2025

    Registrar

    get.gov

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    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.
    C
    65/100
    Mobile Friendly
    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=1.0
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Barlow

    WCAG AA
    63/100
    Readability
    /30
    18/30

    32px · LH 1.25

    Hierarchy
    /20
    8/20

    1x ratio

    WCAG
    /25
    19/25

    6.26:1 min contrast

    Performance
    /25
    18/25

    1 font · 2 req

    Heading Font

    Barlow

    Sans32px

    Body Font

    Barlow

    Sans32px

    Contrast Ratio

    6.26:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    Single Font Family

    left aligned
    32px
    h1
    16px
    h2
    32px
    p

    ✅ Excellent readability: 32px body text is ideal for all devices.

    ⚠️ Tight line spacing (1.25). Increase to 1.4–1.6 for better readability.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.3:1).

    ❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

    ✅ Lean font stack: 1 font families keeps load times fast.

    Buy on MyFonts

    Color Palette

    6 unique colors
    Light
    #ffffff
    Background· 48.699999999999996%
    #e7f0f9
    Background· 19.999999999999996%
    #035583
    Primary· 15.299999999999999%
    #75a0ab
    Secondary· 6.7%
    #c3dcc9
    Secondary· 6.1%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    2 Resources

    1
    Scripts
    1
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(1)

    Website Identity

    science.gov

    26 years old
    Location detected: 🇺🇸 United Statesvia ip
    get.goven

    Sponsored

    Last analyzed: 26 Apr 2026 at 18:11

    Historical Analysis & Change Tracking