downsub.com

https://downsub.com· First analyzed 14 May 2026· Updated 14 May 2026

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downsub.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.26.3.123

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dom.ns.cloudflare.com.serena.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

690 ms10%

Speed Index

897 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

534 KB

55 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

8 Technologies Detected

Analytics

Advertising

CSS Frameworks

Icon Libraries

Tag Managers

CDN

SEO Analysis

D51/100

Meta Tags11/15

Content3/12

Headings3/8

Technical17/25

E-E-A-T0/7

Images1/7

Links4/5

URL5/5

Social3/5

Freshness0/4

Mobile1/4

Indexability3/3

downsub.comdownsub.com

Free Subtitle Downloader — YouTube, Viki, Viu, WeTV & More - DownSub

DownSub is a free online subtitle downloader. Get SRT, VTT, TXT subtitles from YouTube, Viki, Viu, WeTV, iQiyi, Hotstar, Dailymotion and 50+ sites. No instal...

Description truncated.

Title Length68 chars

Recommended: 50-60 chars (~413px / 580px)

Description Length166 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (2/3) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

559 URLs

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

13/100

Poor

4 12 2

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

Sponsored

AI & LLM Readiness

F39/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

Citation

10/25

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.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

header/footer

Text ratio:2%

Words:135

Token eff.:Too Short

Sections/1K:29.6

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary51w

Descriptive Headingsavg 3.2w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (10)

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.

54/100

Passed

Critical

Warnings

Images & Alt Text

3/20

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

Semantic Structure

13/20

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

4/15

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.

63/100

54 mg

CO₂e / view

534.1 KB

Page Weight

80%

Cleaner Than

New Visitor

62 mg

Returning (cached)

31 mg

Annual (10K/mo)

6.5 kg

Emission Segments

Data Center

3 mg

Network

16 mg

Device

35 mg

Resource Breakdown

JavaScript

299.6 KB

Images

99.1 KB

CSS

133.6 KB

HTML

1.8 KB

Green Hosting Verified

Cloudflare

GWF Verified

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

26%Critical

Interactive

HTTPS

WAF

88d

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

Valid From

13.05.2026

Valid Until

11.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

downsub.comyoutube-checker.downsub.com

SHA-256 Fingerprint

55:79:44:AE:6F:B6:76:88:1D:20:F3:09:87:18:99:E7:5F:5D:E1:33...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cf-cache-status

DYNAMIC

cf-ray🇫🇷 Paris

9fb8bf232c6b22aa-CDG

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Thu, 14 May 2026 09:06:24 GMT

last-modified

Thu, 14 May 2026 05:07:08 GMT

Good Warning Issue

Email Infrastructure

Zoho Mail

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (3)

mx.zoho.eu

mx3.zoho.eu

mx2.zoho.eu

Domain Information

downsub.com

Domain Age

11y 1m

Created

10.04.2015

Expires

10.04.2027

Last Updated

11.03.2026

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.

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

Roboto

WCAG Partial

70/100

Readability

/30

27/30

16px · LH 1.50

Hierarchy

/20

7/20

WCAG

/25

17/25

3.05:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

Roboto

Sans

Body Font

Roboto

Sans16px

Contrast Ratio

3.05:1

6 issues

Reading Comfort

~40 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: 6 elements below WCAG AA threshold (min 3.0:1).

❌ 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 53

Color Palette

6 unique colors

2.89:1 Fail Light

#f9f9f9

Background· 82.99999999999997%

#a09091

Secondary· 3.2%

#2a1a2c

Primary· 5.2%

#5a7079

Secondary· 2.9%

#9abcbe

Secondary· 2.5%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

TaboolaMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)local(2)preferencenail.com(2)kettledroopingcontinuation.com(2)gum.criteo.com(1)

Website Identity

downsub.com

11 years old

Location detected: 🇨🇦 Canadavia ip

Cloudflare, Inc.📧 Zoho Mailen

Sponsored

Last analyzed: 14 May 2026 at 09:06

Historical Analysis & Change Tracking