regexlib.com

https://regexlib.com· First analyzed 12 May 2026· Updated 12 May 2026

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regexlib.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.67.197.3

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

athena.ns.cloudflare.com.sean.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

652 ms10%

Speed Index

848 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

103 KB

30 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

4 Technologies Detected

Analytics

CDN

Frameworks

Customer Support

SEO Analysis

D50/100

Meta Tags9/15

Content10/12

Headings8/8

Technical4/21

E-E-A-T0/7

Images2/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

regexlib.comregexlib.com

Regular Expression Library

Regular Expression Library provides a searchable database of regular expressions. Users can add, edit, rate, and test regular expressions.

Title Length26 chars

Recommended: 50-60 chars (~154px / 580px)

Description Length139 chars

Recommended: 120-160 chars

Issues (1)

• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

12 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

F36/100

Bot Access

20/25

Machine Read.

9/25

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

Text ratio:14%

Words:355

Token eff.:Optimal

Sections/1K:33.8

Structured Data

No Schema

Citation Readiness

Opening Summary59w

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 (12)

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.

63/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

8/20

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.

3 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.

59/100

A+

10 mg

CO₂e / view

102.9 KB

Page Weight

95%

Cleaner Than

New Visitor

12 mg

Returning (cached)

6 mg

Annual (10K/mo)

1.2 kg

Emission Segments

Data Center

<0.001 g

Network

3 mg

Device

7 mg

Resource Breakdown

JavaScript

61.9 KB

Images

1.1 KB

CSS

33.6 KB

HTML

6.3 KB

Green Hosting Verified

Cloudflare

GWF Verified

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

26%Critical

Interactive

HTTPS

WAF

73d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

26.04.2026

Valid Until

25.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

regexlib.com*.regexlib.com

SHA-256 Fingerprint

0C:C9:B9:C6:61:0A:C5:C5:20:CB:5A:4D:C0:22:48:27:0B:B3:30:2E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🟣 Private(private)

cf-cache-status

DYNAMIC

cf-ray🇫🇷 Paris

9fa99a1c0e36c2cf-CDG

content-encoding

zstd

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

regexlib.com

Domain Age

24y 8m

Created

25.08.2001

Expires

25.08.2027

Last Updated

08.03.2026

Registrar

Cloudflare, 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.

34/100

Not 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.

4 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Tahoma

WCAG AA

61/100

Readability

/30

15/30

10px · LH 1.40

Hierarchy

/20

13/20

2.22x ratio

WCAG

/25

19/25

5.47:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Tahoma

Sans22px

Body Font

Tahoma

Sans10px

Contrast Ratio

5.47:1

WCAG AA (≥4.5:1)

Reading Comfort

~69 CPL

Optimal (45–75)

22px

19px

12px

10px

❌ Critical: 10px body text is too small. Minimum 14px, recommend 16px+.

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

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

⚠️ Hard to read: Flesch score 36/100. Simplify sentences for wider reach.

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.5:1).

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

Buy on MyFontsFlesch 36

Color Palette

6 unique colors

Light

#f7ffed

Primary· 45.1%

#4a692e

Secondary· 30.9%

#c5e4ad

Secondary· 11%

#e5f7dd

Accent· 6.5%

#99b196

Secondary· 5.6%

#304736

Secondary· 0.9%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)rules.quantcount.com(1)google-analytics.com(1)edge.quantserve.com(1)s1.lqcdn.com(1)

Website Identity

regexlib.com

24 years old

Location detected: 🇨🇦 Canadavia ip

Cloudflare, Inc.

Sponsored

Last analyzed: 12 May 2026 at 13:00

Historical Analysis & Change Tracking