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SGSiteGraph

bitsavers.org

The bitsavers main page

Last scanned Jul 27, 2026, 1:43 PM · 1 view

70

Overall score

Fair

Summary

This website uses Apache hosted on TZULO - tzulo, inc., US. SEO is fair (60/100) and accessibility is fair (55/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.

United States
Hosted on TZULO - tzulo, inc., US

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.

  • Missing meta description

    SEO

    Add a ~150-character meta description to control your search-result snippet and lift click-through rate.

  • 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.

60

SEO

6 issue(s) found

100

Performance

245 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.

Meta tags

Title
The bitsavers main page
Description
Canonical
Language
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.

Apache

Hosting & CDN

Hosting provider
TZULO - tzulo, inc., US
CDN provider
—
IP address
208.77.18.144
ASN
AS11878 (TZULO - tzulo, inc., US)

DNS records

TypeValue
A
  • 208.77.18.144
AAAA—
MX
  • web15.dnchosting.com
TXT
  • v=spf1 +mx +a +ip4:192.64.150.15 ~all
NS
  • ns1.directnic.com
  • ns0.directnic.com
  • ns3.directnic.com
  • ns2.directnic.com
CAA—
CNAME—
IPv6 supportNo

TLS / SSL certificate

Version
TLS 1.3
Issuer
Let's Encrypt
Subject
bitsavers.org
Valid from
Jun 23, 2026
Valid to
Sep 21, 2026
Days until expiry
56
SAN domains
bitsavers.org, www.bitsavers.org

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 1 · H2 12 · H3 11

Links

7 internal · 4 external · 1 broken

Images

8 total · 8 missing alt

Scripts / Styles

0 scripts · 0 stylesheets

JS / CSS size

0 B · 0 B

Page size

9.2 KB

Robots.txt & Sitemap

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

SEO issues

  • Missing meta description
  • Missing canonical link
  • 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
  • Missing <html lang> attribute
  • Missing viewport meta tag

Scan details

Requested URL
https://bitsavers.org
Final URL
https://bitsavers.org
HTTP status
200
HTTP version
HTTP/1.1
Response time
245 ms
HTML size
9.2 KB
Redirect chain
https://bitsavers.org

See something wrong on this report? Request a correction

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Frequently asked questions

What technology does bitsavers.org use?
bitsavers.org is built with Apache.
Is bitsavers.org secure (HTTPS)?
Yes. bitsavers.org uses TLS 1.3 with a certificate issued by Let's Encrypt, valid until Sep 21, 2026.
Who hosts bitsavers.org?
bitsavers.org is hosted on TZULO - tzulo, inc., US.
What is bitsavers.org's SEO score?
bitsavers.org scored 60/100 for SEO in the latest analysis (fair).
What is bitsavers.org's overall website score?
bitsavers.org has an overall SiteGraph score of 70/100, combining SEO, performance, security, and accessibility.