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lmfdb.org

LMFDB - The L-functions and modular forms database

Last scanned Jul 26, 2026, 12:19 PM

69

Overall score

Fair

Summary

Welcome to the LMFDB, the database of L-functions, modular forms, and related objects. This website uses Google Analytics. SEO is fair (55/100) and accessibility is fair (55/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Meta description longer than 160 characters.

Welcome to the LMFDB, the database of L-functions, modular forms, and related objects. These pages are intended to be a modern handbook including tables, formulas, links, and references for L-functions and their underlying objects.

Top issues to fix

14 issues found · 5 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.

  • Missing X-Content-Type-Options header

    Security

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

+8 more issues — details in the sections below.

55

SEO

7 issue(s) found

100

Performance

555 ms

65

Security

HTTPS & header checks

55

Accessibility

3 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.

Welcome to the LMFDB, the database of L-functions, modular forms, and related objects. These pages are intended to be a modern handbook including tables, formulas, links, and references for L-functions and their underlying objects.

Meta tags

Title
LMFDB - The L-functions and modular forms database
Description
Welcome to the LMFDB, the database of L-functions, modular forms, and related objects. These pages are intended to be a modern handbook including tables, formulas, links, and references for L-functions and their underlying objects.
Canonical
Language
en
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.

jQueryGoogle Analytics

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
Google Trust Services
Subject
www.lmfdb.org
Valid from
Jul 8, 2026
Valid to
Oct 6, 2026
Days until expiry
69
SAN domains
www.lmfdb.org

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 0 · H2 8 · H3 0

Links

41 internal · 4 external · 20 broken

Images

5 total · 5 missing alt

Scripts / Styles

15 scripts · 4 stylesheets

JS / CSS size

8.0 KB · 0 B

Page size

18.8 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
  • 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 viewport meta tag

Scan details

Requested URL
https://lmfdb.org
Final URL
https://www.lmfdb.org/
HTTP status
200
HTTP version
HTTP/2
Response time
555 ms
HTML size
18.8 KB
Redirect chain
https://lmfdb.org → https://www.lmfdb.org/

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Frequently asked questions

What technology does lmfdb.org use?
lmfdb.org is built with jQuery, Google Analytics.
Is lmfdb.org secure (HTTPS)?
Yes. lmfdb.org uses TLS 1.3 with a certificate issued by Google Trust Services, valid until Oct 6, 2026.
Who hosts lmfdb.org?
Hosting provider information for lmfdb.org is not available yet.
What is lmfdb.org's SEO score?
lmfdb.org scored 55/100 for SEO in the latest analysis (fair).
What is lmfdb.org's overall website score?
lmfdb.org has an overall SiteGraph score of 69/100, combining SEO, performance, security, and accessibility.