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51changdu.com

畅读书城_好用的读书软件_富春通信旗下公司[300299]—小说阅读，免费完本下载，连载阅读，玄幻，仙侠，言情，都市

Last scanned Jul 26, 2026, 5:17 AM

60

Overall score

Fair

Summary

好用的手机阅读软件，海量精选小说，全网更新快，一键缓存、离线听书、智能导书、 随心个性化专属阅读风格、是当前功能强大的读书App之一，5000万书友的共同选��… This website uses jQuery. SEO is fair (50/100) and accessibility is poor (45/100). Security scores fair (65/100) and performance good (80/100). Top issue: Title longer than 60 characters.

好用的手机阅读软件，海量精选小说，全网更新快，一键缓存、离线听书、智能导书、 随心个性化专属阅读风格、是当前功能强大的读书App之一，5000万书友的共同选择；提供玄幻奇幻，现代都市，仙侠武侠,游戏竞技等十三大类热门小说，30万本正版、免费小说；掌上阅读精彩尽在畅读书城！

Top issues to fix

17 issues found · 6 high priority

  • Missing Strict-Transport-Security header

    Security

    Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • No H1 heading found

    SEO

    Add exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.

  • Over half of images are missing alt text

    Accessibility

    Add alt attributes to images — screen readers depend on them, and they help image SEO.

  • Missing viewport meta tag

    Accessibility

    Add <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.

  • Slow estimated load (12.6s)

    Performance

    Use a CDN, enable caching/compression, and cut render-blocking assets — every extra second costs conversions.

+11 more issues — details in the sections below.

50

SEO

8 issue(s) found

80

Performance

12.55 s

65

Security

HTTPS & header checks

45

Accessibility

4 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

好用的手机阅读软件，海量精选小说，全网更新快，一键缓存、离线听书、智能导书、 随心个性化专属阅读风格、是当前功能强大的读书App之一，5000万书友的共同选择；提供玄幻奇幻，现代都市，仙侠武侠,游戏竞技等十三大类热门小说，30万本正版、免费小说；掌上阅读精彩尽在畅读书城！

Meta tags

Title
畅读书城_好用的读书软件_富春通信旗下公司[300299]—小说阅读，免费完本下载，连载阅读，玄幻，仙侠，言情，都市
Description
好用的手机阅读软件，海量精选小说，全网更新快，一键缓存、离线听书、智能导书、 随心个性化专属阅读风格、是当前功能强大的读书App之一，5000万书友的共同选择；提供玄幻奇幻，现代都市，仙侠武侠,游戏竞技等十三大类热门小说，30万本正版、免费小说；掌上阅读精彩尽在畅读书城！
Canonical
Language
Charset
utf-8
Viewport
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
—
og:description
—
og:type
—
og:url
—

Twitter Card

twitter:card
—
twitter:title
—
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

jQuery

Hosting & CDN

Hosting provider
—
CDN provider
—
IP address
—
ASN
—

DNS records

TypeValue
A—
AAAA—
MX—
TXT—
NS—
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
*.51changdu.com
Valid from
Jun 10, 2026
Valid to
Sep 8, 2026
Days until expiry
44
SAN domains
*.51changdu.com, 51changdu.com

Security headers

  • Strict-Transport-SecurityMissing
  • Content-Security-PolicyMissing
  • X-Frame-OptionsMissing
  • X-Content-Type-OptionsMissing
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 0 cookie(s) observed

Content & assets

Headings

H1 0 · H2 4 · H3 0

Links

13 internal · 17 external · 16 broken

Images

16 total · 14 missing alt

Scripts / Styles

7 scripts · 1 stylesheets

JS / CSS size

4.0 KB · 0 B

Page size

19.2 KB

Robots.txt & Sitemap

robots.txt
Not found
Disallow rules
0
sitemap.xml
Not found
URLs in sitemap
0

SEO issues

  • Title longer than 60 characters
  • Meta description longer than 160 characters
  • Missing canonical link
  • No H1 heading found
  • No structured data (JSON-LD) found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • Over half of images are missing alt text
  • No H1 heading found
  • Missing <html lang> attribute
  • Missing viewport meta tag

Scan details

Requested URL
https://51changdu.com
Final URL
https://www.51changdu.com/
HTTP status
200
HTTP version
HTTP/2
Response time
12.55 s
HTML size
19.2 KB
Redirect chain
https://51changdu.com → https://www.51changdu.com/

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Frequently asked questions

What technology does 51changdu.com use?
51changdu.com is built with jQuery.
Is 51changdu.com secure (HTTPS)?
Yes. 51changdu.com uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 8, 2026.
Who hosts 51changdu.com?
Hosting provider information for 51changdu.com is not available yet.
What is 51changdu.com's SEO score?
51changdu.com scored 50/100 for SEO in the latest analysis (fair).
What is 51changdu.com's overall website score?
51changdu.com has an overall SiteGraph score of 60/100, combining SEO, performance, security, and accessibility.