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string-db.org

STRING: functional protein association networks

Last scanned Aug 3, 2026, 3:00 PM · 5 views

84

Overall score

Great

Summary

STRING is a database of known and predicted protein-protein interactions and a functional enrichment tool. This website uses Google Analytics behind Cloudflare CDN. SEO is good (80/100) and accessibility is excellent (95/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Multiple H1 headings found.

STRING

STRING is a database of known and predicted protein-protein interactions and a functional enrichment tool.

Top issues to fix

11 issues found · 3 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.

  • Missing viewport meta tag

    Accessibility

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

  • Missing X-Content-Type-Options header

    Security

    Add X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.

  • Missing X-Frame-Options header

    Security

    Add X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.

  • 5 cookies without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

+5 more issues — details in the sections below.

80

SEO

4 issue(s) found

100

Performance

369 ms

65

Security

HTTPS & header checks

95

Accessibility

1 issue(s) found

Score history

-3 overall since Jul 26, 2026

Overall
84
SEO
80
Security
65
Performance
100
Accessibility
95

Organization

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

STRING

STRING is a database of known and predicted protein-protein interactions and a functional enrichment tool.

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
STRING: functional protein association networks
Description
STRING is a database of known and predicted protein-protein interactions and a functional enrichment tool.
Canonical
https://string-db.org
Language
en
Charset
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.

Google Analytics

Hosting & CDN

Hosting provider
—
CDN provider
Cloudflare
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
string-db.org
Valid from
Jul 22, 2026
Valid to
Oct 20, 2026
Days until expiry
78
SAN domains
*.string-db.org, string-db.org

Security headers

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

Compression: gzip · 5 cookie(s) observed

Content & assets

Headings

H1 2 · H2 9 · H3 0

Links

45 internal · 7 external · 16 broken

Images

53 total · 1 missing alt

Scripts / Styles

13 scripts · 1 stylesheets

JS / CSS size

3.8 KB · 0 B

Page size

117 KB

Robots.txt & Sitemap

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

SEO issues

  • Multiple H1 headings found
  • Missing OpenGraph tags
  • robots.txt not found
  • sitemap.xml not found

Accessibility issues

  • Missing viewport meta tag

Scan details

Requested URL
https://string-db.org
Final URL
https://string-db.org
HTTP status
200
HTTP version
HTTP/2
Response time
367 ms
HTML size
117 KB
Redirect chain
https://string-db.org

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Frequently asked questions

What technology does string-db.org use?
string-db.org is built with Google Analytics.
Is string-db.org secure (HTTPS)?
Yes. string-db.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Oct 20, 2026.
Who hosts string-db.org?
Hosting provider information for string-db.org is not available yet.
What is string-db.org's SEO score?
string-db.org scored 80/100 for SEO in the latest analysis (great).
What is string-db.org's overall website score?
string-db.org has an overall SiteGraph score of 84/100, combining SEO, performance, security, and accessibility.
What company operates string-db.org?
string-db.org is operated by STRING. STRING is a database of known and predicted protein-protein interactions and a functional enrichment tool.
Has string-db.org's score changed over time?
string-db.org's overall score has declined by 3 points (from 87 to 84) since Jul 26, 2026.