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https://diagrams.net

SEO

· 7 checks — Canonical, meta, content depth, internal links, image SEO, and hreflang rolled into one auditable list.
SCORE
81
GRADE
B
FIX
1
REVIEW
1
PASS
4
INFO
1

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

Checks
7
4 PASS 1 REVIEW 1 FIX
D
Content Depth
Action
285 words, Difficult
FIX
285 words, Difficult
Warning::
Page has 285 words — thin content
Most well-ranking pages have 300+ words of substantive content.
Info::
Reading level: Difficult (grade 9)
Warning::
Thin content — only 285 words
Got: 285 words
285 words

Thin content

Reading level

Very Easy
Easy
Fairly Easy
Standard
Fairly Difficult
Difficult
Very Difficult

Grade 9

Text-to-HTML Ratio

5% text 95% HTML

2 KB / 34 KB

Most well-ranking pages have 300+ words of substantive content.

Why this matters

Thin content (<300 words) rarely ranks — Google quality guidelines explicitly call out thin pages.

Source: Google Search Quality Guidelines

B
Canonical URL
Minor issues
REVIEW
Minor issues
Warning::
No canonical tag found
Search engines will determine the canonical URL themselves, which may cause duplicate content issues.
No Canonical URL Set
Page URL https://diagrams.net Canonical (not set)

Search engines will determine the canonical URL themselves, which may cause duplicate content issues.

Why this matters

Without a canonical, Google may treat each URL variant (with/without slash, with tracking params, http/https) as duplicate content and split ranking.

Learn more ▾

A canonical link tells Google which URL is the 'real' one when multiple URLs serve identical content. Without it, link equity gets split across variants and none of them rank as well as a single canonical version would. One <link rel="canonical"> tag in <head> covers it.

Source: Google Search Central

A
Meta Tags
Title: 7 chars
PASS
Title: 7 chars
Info::
Page title is set
Got: draw.io
Warning::
Title is only 7 characters — consider expanding
Info::
Title and H1 have very different wording
Alignment helps users confirm they've reached the right page.
Title

"draw.io"

7 characters Too short
Title: draw.io
H1: Security-first diagramming for teams.
Match: Very different
Robots: Indexable (no restrictions)

Alignment helps users confirm they've reached the right page.

Why this matters

Title and H1 disagree significantly — Google may treat one as the canonical topic and the other as off-topic, weakening ranking.

Learn more ▾

Title is the SERP headline; H1 is the on-page headline. They should describe the same page. Large divergence (different topics, different keywords) signals confusion and Google may rewrite the title in SERP. Align both to the same primary topic.

Source: Google Search Central / on-page SEO

A+
Image SEO
17 images, 17 descriptive filenames
PASS
17 images, 17 descriptive filenames
Info::
All images have descriptive filenames
17 descriptive
0 hash-based
0 generic
17 total
All images have descriptive filenames and proper SEO attributes.

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.

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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