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https://computerhistory.org

SEO

· 7 checks — Canonical, meta, content depth, internal links, image SEO, and hreflang rolled into one auditable list.
SCORE
88
GRADE
B
FIX
0
REVIEW
1
PASS
5
INFO
1

Cross-tab audit — SEO, performance, crawlability, mobile, structured data

Checks
7
5 PASS 1 REVIEW
C
Content Depth
Action
797 words, Difficult
REVIEW
797 words, Difficult
Info::
Page has 797 words of content
Info::
Text-to-HTML ratio is 4%
Very low ratio suggests heavy framework overhead or boilerplate.
Info::
Reading level: Difficult (grade 13)
797 words

Good depth

Reading level

Very Easy
Easy
Fairly Easy
Standard
Fairly Difficult
Difficult
Very Difficult

Grade 13

Text-to-HTML Ratio

4% text 96% HTML

5 KB / 121 KB

Very low ratio suggests heavy framework overhead or boilerplate.

Why this matters

Informational: ratio of visible text bytes to total HTML bytes. Very low ratios suggest excessive markup overhead.

A+
Canonical URL
Properly configured
PASS
Properly configured
Info::
Canonical tag present
Got: https://computerhistory.org/
Info::
Canonical is self-referencing
Info::
Canonical matches final URL after redirects
Info::
Canonical target returns 200
Canonical URL Configured
Page URL https://computerhistory.org Canonical https://computerhistory.org/ Match Self-referencing (correct) Target 200 ✓
A
Meta Tags
Title: 10 chars
PASS
Title: 10 chars
Info::
Page title is set
Got: Home - CHM
Warning::
Title is only 10 characters — consider expanding
Info::
Title and H1 are well-aligned
Title

"Home - CHM"

10 characters Too short
Title: Home - CHM
H1: Welcome to CHM
Match: Very different
Robots: Indexable (no restrictions)
A+
Image SEO
25 images, 25 descriptive filenames
PASS
25 images, 25 descriptive filenames
Info::
All images have descriptive filenames
Info::
2 image(s) missing alt text — see Accessibility tab
25 descriptive
0 hash-based
0 generic
25 total
FilenameQualityAltIssues
panel-red-lines.svgdescriptive✗1
panel-chm-logo-short.pngdescriptive✗1

See Accessibility tab for detailed alt text quality analysis.

A+
Schema Markup Audit
Per-type completeness vs Schema.org requirements + rich-result eligibility
PASS

No structured data detected

Without JSON-LD or microdata, this page can't qualify for any of Google's rich result formats. Even basic Organization or WebSite schema is a quick win.

Missing schema opportunities

  • moderate

    Event

    Page mentions an event (time element or event markup) that could be marked up as Event

    Events appear in dedicated event search and Google Events

Hreflang
0 hreflang tags
INFO
0 hreflang tags

No hreflang tags detected.

Hreflang tags are only needed for multilingual or multi-regional sites.

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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