52songshu.com
元微科技产品官网
Last scanned Aug 4, 2026, 5:00 AM · 6 views
Overall score
Fair
Summary
松鼠PDF2022版是专为办公而生的PDF编辑器。不仅轻便小巧，功能齐全，操作简单，更内置超过100个高频常用的PDF功能。PDF阅读器：贴近原生office界面沉浸式阅读体验，多… This website uses Nginx. SEO is fair (60/100) and accessibility is fair (70/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.
松鼠PDF2022版是专为办公而生的PDF编辑器。不仅轻便小巧，功能齐全，操作简单，更内置超过100个高频常用的PDF功能。PDF阅读器：贴近原生office界面沉浸式阅读体验，多种阅读模式适应各种使用场合，有效减缓眼睛疲劳就用护眼模式阅读。PDF编辑器：word般丝滑却更强大的PDF编辑器，即便是扫描件PDF也能轻松识别文本、图片、表格后进行随意方便的调整。PDF转换器：全格式无损互转，图片、cad、office、电子书、ofd互转
Top issues to fix
13 issues found · 3 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
+7 more issues — details in the sections below.
SEO
7 issue(s) found
Performance
390 ms
Security
HTTPS & header checks
Accessibility
1 issue(s) found
Score history
0 overall since Jul 27, 2026
- Overall
- 73
- SEO
- 60
- Security
- 65
- Performance
- 100
- Accessibility
- 70
Organization
Company details published in this site's own structured data.
松鼠PDF2022版是专为办公而生的PDF编辑器。不仅轻便小巧，功能齐全，操作简单，更内置超过100个高频常用的PDF功能。PDF阅读器：贴近原生office界面沉浸式阅读体验，多种阅读模式适应各种使用场合，有效减缓眼睛疲劳就用护眼模式阅读。PDF编辑器：word般丝滑却更强大的PDF编辑器，即便是扫描件PDF也能轻松识别文本、图片、表格后进行随意方便的调整。PDF转换器：全格式无损互转，图片、cad、office、电子书、ofd互转
Meta tags
- Title
- 元微科技产品官网
- Description
- 松鼠PDF2022版是专为办公而生的PDF编辑器。不仅轻便小巧，功能齐全，操作简单，更内置超过100个高频常用的PDF功能。PDF阅读器：贴近原生office界面沉浸式阅读体验，多种阅读模式适应各种使用场合，有效减缓眼睛疲劳就用护眼模式阅读。PDF编辑器：word般丝滑却更强大的PDF编辑器，即便是扫描件PDF也能轻松识别文本、图片、表格后进行随意方便的调整。PDF转换器：全格式无损互转，图片、cad、office、电子书、ofd互转
- Canonical
- Language
- zh-CN
- Charset
- utf-8
- Viewport
- width=device-width, initial-scale=1
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
DNS records
| Type | Value |
|---|---|
| A | — |
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.2
- Issuer
- Beijing Xinchacha Credit Management Co., Ltd.
- Subject
- *.52songshu.com
- Valid from
- Oct 30, 2025
- Valid to
- Oct 30, 2026
- Days until expiry
- 86
- SAN domains
- *.52songshu.com, 52songshu.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 3 · H2 0 · H3 0
Links
0 internal · 1 external · 1 broken
Images
1 total · 1 missing alt
Scripts / Styles
5 scripts · 3 stylesheets
JS / CSS size
322 B · 0 B
Page size
14.5 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Meta description longer than 160 characters
- Missing canonical link
- Multiple H1 headings 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
Scan details
- Requested URL
- https://52songshu.com
- Final URL
- https://52songshu.com
- HTTP status
- 200
- HTTP version
- HTTP/1.1
- Response time
- 390 ms
- HTML size
- 14.5 KB
- Redirect chain
- https://52songshu.com
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does 52songshu.com use?
- 52songshu.com is built with Bootstrap, jQuery, Nginx.
- Is 52songshu.com secure (HTTPS)?
- Yes. 52songshu.com uses TLS 1.2 with a certificate issued by Beijing Xinchacha Credit Management Co., Ltd., valid until Oct 30, 2026.
- Who hosts 52songshu.com?
- Hosting provider information for 52songshu.com is not available yet.
- What is 52songshu.com's SEO score?
- 52songshu.com scored 60/100 for SEO in the latest analysis (fair).
- What is 52songshu.com's overall website score?
- 52songshu.com has an overall SiteGraph score of 73/100, combining SEO, performance, security, and accessibility.
- Has 52songshu.com's score changed over time?
- 52songshu.com's overall score has stayed steady at 73/100 since Jul 27, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card