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h2database.com

https://h2database.com· First analyzed 01 May 2026· Updated 01 May 2026
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h2database.com
Desktop screenshot of h2database.com
Mobile screenshot of h2database.com
Mobile

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Hosting Provider

Metanet AG

IP Address

80.74.147.171

Site Location

🇨🇭 Switzerlandvia ip

Server Location

🇨🇭 Zurich, Switzerland

ASN

AS21069

Organization

Metanet AG

Server

Nginx

Nameservers

ns30.kreativmedia.ch.ns29.kreativmedia.ch.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
220 ms10%
Speed Index
286 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
85 KB
8 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Metanet AG

Technology Stack

2 Technologies Detected

Payments

1
PayPal

Web Servers

1
Nginx

SEO Analysis

D53/100
15
9
0
Meta Tags5/15
Content9/12
Headings8/8
Technical12/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile2/4
Indexability3/3
H
h2database.comh2database.com

H2 Database Engine

H2 is free SQL database written in Java

Title Length18 chars

Recommended: 50-60 chars (~109px / 580px)

Description Length39 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    3 rules

    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

    F30/100
    Bot Access
    20/25
    Machine Read.
    5/25
    Schema Data
    0/25
    Citation
    5/25

    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
    Text ratio:12%
    Words:247
    Token eff.:Too Short
    Sections/1K:20.2

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary13w
    Descriptive Headingsavg 1w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    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
    72/100
    9
    Passed
    4
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    14/20
    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
    7/15
    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.
    61/100
    A+
    11 mg
    CO₂e / view
    84.7 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    12 mg
    vs
    Returning (cached)
    6 mg
    Annual (10K/mo)
    1.3 kg
    Emission Segments
    Data Center
    2 mg
    Network
    3 mg
    Device
    6 mg
    Resource Breakdown
    JavaScript
    65.8 KB
    Images
    14.2 KB
    HTML
    4.6 KB
    Green Hosting Not Verified
    Metanet AG
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Critical / Transactional

    HTTPS

    No WAF

    56d

    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

    29.03.2026

    Valid Until

    27.06.2026

    Subject Alternative Names (2)

    h2database.comwww.h2database.com

    SHA-256 Fingerprint

    F5:25:22:85:A3:5D:79:B5:F7:7A:B8:25:90:4C:72:99:1F:1B:C6:CA...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html
    date
    Fri, 01 May 2026 17:23:56 GMT
    etag
    W/"68d1cb8e-63c"
    last-modified
    Mon, 22 Sep 2025 22:19:58 GMT
    server
    nginx
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    98

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    mail.h2database.com

    Domain Information

    h2database.com

    Domain Age
    20y 4m

    Created

    13.12.2005

    Expires

    13.12.2026

    Last Updated

    14.12.2025

    Registrar

    Key-Systems GmbH

    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
    59/100
    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
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Arial

    WCAG AAA
    79/100
    Readability
    /30
    18/30

    13px · LH 1.40

    Hierarchy
    /20
    17/20

    1.69x ratio · ✓ H1→H6

    WCAG
    /25
    24/25

    7.41:1 min contrast

    Performance
    /25
    20/25

    System fonts

    Heading Font

    Arial

    Sans22px

    Body Font

    Arial

    Sans13px

    Contrast Ratio

    7.41:1

    WCAG AAA (≥7:1)

    Reading Comfort

    ~63 CPL

    Optimal (45–75)
    22px
    h1
    19px
    h2
    13px
    p

    ❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

    ✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

    ✅ Optimal line length: ~63 chars/line (ideal 45–75 CPL).

    ⚠️ Hard to read: Flesch score 48/100. Simplify sentences for wider reach.

    ✅ WCAG AAA contrast: All text meets 7:1 ratio (min 7.4:1).

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

    Flesch 48

    Color Palette

    5 unique colors
    Light
    #ffffff
    Background· 77%
    #9e9eb7
    Primary· 4%
    #cbccd5
    Secondary· 2.9%
    #3035b7
    Accent· 2.5%

    Sponsored

    Scripts & Styles

    4 Resources

    3
    Scripts
    1
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    navigation.js(1)index.js(1)search.js(1)

    Website Identity

    h2database.com

    20 years old
    Location detected: 🇨🇭 Switzerlandvia ip
    Key-Systems GmbHen

    Social Profiles

    GitHub

    Sponsored

    Last analyzed: 01 May 2026 at 17:24

    Historical Analysis & Change Tracking