valgrind.org

https://valgrind.org· First analyzed 26 Apr 2026· Updated 26 Apr 2026

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valgrind.org

Mobile

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Hosting Provider

Red Hat, Inc

IP Address

38.145.34.32

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Ashburn, United States

ASN

AS21785

Organization

Red Hat, Inc

Server

Apache

Nameservers

dns102.register.com.dns101.register.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

778 ms10%

Speed Index

1.0 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

239 KB

9 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Red Hat, Inc

Technology Stack

3 Technologies Detected

Languages

Pythonv3.6 PHPv7.2.24

Web Servers

Apachev2.4.37

SEO Analysis

D51/100

Meta Tags7/15

Content10/12

Headings3/8

Technical10/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

valgrind.orgvalgrind.org

Valgrind Home

Official Home Page for valgrind, a suite of tools for debugging and profiling. Automatically detect memory management and threading bugs, and perform detaile...

Description truncated.

Title Length13 chars

Recommended: 50-60 chars (~79px / 580px)

Description Length217 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

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Crawlability

Sitemap

robots.txt

12 rules

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.

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AI & LLM Readiness

F39/100

Bot Access

20/25

Machine Read.

10/25

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

Text ratio:36%

Words:335

Token eff.:Optimal

Sections/1K:6

Structured Data

No Schema

Citation Readiness

Opening Summary39w

Descriptive Headingsavg 2.5w

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...

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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.

67/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

7/20

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.

2 recommendations

•Accessibility recommendation preview...

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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+

30 mg

CO₂e / view

239.4 KB

Page Weight

95%

Cleaner Than

New Visitor

34 mg

Returning (cached)

17 mg

Annual (10K/mo)

3.6 kg

Emission Segments

Data Center

7 mg

Network

7 mg

Device

16 mg

Resource Breakdown

Images

20.0 KB

CSS

216.4 KB

HTML

3.0 KB

Green Hosting Not Verified

Red Hat, Inc

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

76%Good

Static / Informational

HTTPS

No WAF

39d

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/1.1

Valid From

07.03.2026

Valid Until

05.06.2026

Subject Alternative Names (2)

valgrind.orgwww.valgrind.org

SHA-256 Fingerprint

11:CC:0A:8E:BE:37:DE:42:C7:97:F7:83:74:60:A9:F1:BA:9A:B1:5D...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

2771

content-security-policy

default-src 'self' http: https:

content-type

text/html; charset=UTF-8

date

Sun, 26 Apr 2026 20:31:40 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

sourceware.org

Domain Information

valgrind.org

Domain Age

24y 3m

Created

06.01.2002

Expires

06.01.2031

Last Updated

29.11.2021

Registrar

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.

30/100

Not 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.

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Arial

WCAG AAA

64/100

Readability

/30

15/30

14px · LH 1.25

Hierarchy

/20

8/20

WCAG

/25

21/25

9.94:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Arial

Sans

Body Font

Arial

Sans14px

Contrast Ratio

9.94:1

WCAG AAA (≥7:1)

Reading Comfort

~40 CPL

Narrow lines

21px

17px

14px

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

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

❌ Very complex text: Flesch score 24/100. Consider shorter sentences and simpler words.

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.9:1).

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 24

Color Palette

8 unique colors

Light

#ffffff

Background· 54.8%

#b5c6bd

Border· 9%

#e3c96e

Accent· 6.4%

#dbe8e2

Secondary· 4.9%

#967661

Secondary· 4.6%

#b7ab77

Secondary· 3.2%

#fbfad5

Accent· 2.2%

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Scripts & Styles

1 Resources

Scripts

Styles

Async

Defer

Top Script Sources

Website Identity

valgrind.org

24 years old

Location detected: 🇺🇸 United Statesvia ip

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Last analyzed: 26 Apr 2026 at 20:32

Historical Analysis & Change Tracking