craftinginterpreters.com

https://craftinginterpreters.com· First analyzed 08 May 2026· Updated 08 May 2026

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Mobile

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Hosting Provider

HostPapa

hostpapa.com

IP Address

216.222.199.203

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Los Angeles, United States

ASN

AS40092

Organization

HostPapa

Server

Nginx

Nameservers

ns2.hostpapa.com.ns1.hostpapa.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

550 ms10%

Speed Index

715 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

2.3 MB

15 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

HostPapa

Technology Stack

5 Technologies Detected

Analytics

Fonts

Email Marketing

Web Servers

SEO Analysis

D46/100

Meta Tags4/15

Content10/12

Headings1/8

Technical9/21

E-E-A-T3/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

craftinginterpreters.comcraftinginterpreters.com

Crafting Interpreters

No description available for this page.

Title Length21 chars

Recommended: 50-60 chars (~125px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1

12 issues found

Upgrade to view details

Local SEO

Local Search Readiness

0/100

Poor

15 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.

12/25

Schema Data

0/25

Citation

2/25

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

blockquotescode blocksheader/footer

Text ratio:24%

Words:401

Token eff.:Optimal

Sections/1K:12.5

Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary16w

Descriptive Headingsavg 1.4w

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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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.

55/100

Passed

Critical

Warnings

Images & Alt Text

10/20

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

Semantic Structure

10/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

10/15

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.

5 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.

26/100

288 mg

CO₂e / view

2.3 MB

Page Weight

50%

Cleaner Than

New Visitor

329 mg

Returning (cached)

165 mg

Annual (10K/mo)

34.6 kg

Emission Segments

Data Center

64 mg

Network

69 mg

Device

155 mg

Resource Breakdown

Images

548.4 KB

CSS

1.7 MB

Fonts

1.2 KB

HTML

3.3 KB

Green Hosting Not Verified

HostPapa

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

21%Critical

Interactive

HTTPS

No WAF

58d

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

06.04.2026

Valid Until

05.07.2026

Subject Alternative Names (4)

*.craftinginterpreters.com*.stuffwithstuff.comcraftinginterpreters.comwww.craftinginterpreters.stuffwithstuff.com

SHA-256 Fingerprint

1D:3F:33:42:BB:21:37:A0:E1:87:F6:0B:21:8C:FE:48:6E:14:D0:19...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Fri, 08 May 2026 06:38:52 GMT

last-modified

Sat, 31 Jul 2021 19:20:21 GMT

server

nginx

vary

Accept-Encoding, Accept-Encoding,User-Agent

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

craftinginterpreters.com

Domain Information

craftinginterpreters.com

Domain Age

10y 5m

Created

16.11.2015

Expires

16.11.2026

Last Updated

09.11.2025

Registrar

Tucows Domains Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

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.

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

3 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Crimson

WCAG Partial

58/100

Readability

/30

23/30

16px · LH 1.50

Hierarchy

/20

8/20

WCAG

/25

14/25

3.74:1 min contrast

Performance

/25

13/25

1 font · 3 req

Heading Font

Crimson

Sans

Body Font

Crimson

Sans16px

Contrast Ratio

3.74:1

44 issues

Reading Comfort

~37 CPL

Narrow lines

24px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 44 elements below WCAG AA threshold (min 3.7:1).

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

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

⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

GGoogle Fonts Buy on MyFontsFlesch 60

Color Palette

6 unique colors

2.3:1 Fail Light

#ffffff

Background· 24.999999999999996%

#a6acae

Other· 7%

#2a303c

Primary· 25.9%

#e0dcd9

Secondary· 21.7%

#617885

Secondary· 3.9%

Business & Marketing Stack

2 Tools Detected

Advanced

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

google-analytics.com(1)

Website Identity

craftinginterpreters.com

10 years old

Location detected: 🇺🇸 United Statesvia ip

Tucows Domains Inc.

Social Profiles

X (Twitter)GitHub

Sponsored

Last analyzed: 08 May 2026 at 06:39

Historical Analysis & Change Tracking