SEO Compare
Compare two pages side by side to see which one is better optimised for a target keyword. Enter both URLs and an optional keyword, then click Compare.
What Is SEO Compare?
SEO Compare analyses two pages side by side across all major on-page SEO factors — title tags, meta descriptions, headings, word count, readability, images, links, structured data, Open Graph tags, and more. If you provide a target keyword, it also compares keyword density and placement to determine which page is better optimised for that term.
When to Use SEO Compare
| Use Case | Example |
|---|---|
| Competitor analysis | Compare your product page with a competitor's page that ranks higher. |
| A/B testing | Compare two versions of a landing page to see which has better SEO. |
| Before/after audit | Compare the same page before and after SEO changes. |
| Content gap analysis | See what SEO elements a competitor has that you are missing. |
What SEO Compare Analyses
For each URL, the tool fetches the page and extracts every on-page SEO factor, then places them side by side with a winner indicator for each:
- Title tag — presence, length, keyword usage
- Meta description — presence, length, keyword usage
- H1 and heading hierarchy — count, structure, keyword placement
- Word count and content depth — longer and more comprehensive typically wins
- Readability (Flesch score) — target 60+ for most content
- Keyword density (when a keyword is provided) — both single-word and phrase
- Internal vs external link counts — link structure signals
- Image count and alt text coverage — image SEO
- Structured data presence — JSON-LD schema detection
- Open Graph and Twitter Card tags — social sharing readiness
- Canonical URL and robots directives — technical hygiene
- HTTPS, page speed signals, mobile readiness — infrastructure
How to Read the Comparison
Each factor is colour-coded: green for the winner, amber for a draw or minor difference, red for a clear loss. Do not fixate on any single factor — the overall pattern matters. A page losing on 3 factors but winning the word count, readability, and keyword density race usually wins in rankings.
What Counts as a "Win"
- Word count: more is usually better, up to the point of padding. A 2000-word page beats a 500-word page on most competitive topics.
- Readability: higher Flesch score is better for general-audience content. Technical content may legitimately score lower.
- Keyword density: 1–3% for the target keyword is ideal. Too low (0%) or too high (>5%) is a loss.
- Internal links: more internal links usually indicate better topic clustering and authority distribution.
- Structured data: presence always wins over absence.
Top Use Cases
Competitor Analysis
Compare your page against the competitor ranking above you for a target keyword. The factors where they win are your action list. A competitor with 1500 words to your 400 is not beating you by luck — they're beating you on content depth.
A/B Testing SEO Changes
Before pushing a major content update, compare the old version (via a staging URL or web archive) to the new version. Confirm the changes improve SEO signals, not just readability or design.
Before/After Migration Audit
After redesigns or CMS migrations, compare key pages pre-and-post to catch regressions. A page that lost its H1 or dropped from 1500 words to 800 during migration is an urgent fix.
Content Gap Analysis
Compare three top-ranking pages for your keyword against each other. Factors all three have that yours lacks represent the minimum bar to compete.
Client Reporting
SEO agencies use comparison reports to justify recommendations to clients. "Here's where the top competitor wins" is more actionable than generic audits.
Limitations
On-page factors are only part of ranking. SEO Compare doesn't measure:
- Backlinks and domain authority — the biggest factor for competitive keywords. Use Ahrefs, SEMrush, or Moz for this.
- User engagement signals (bounce rate, dwell time, CTR) — these require Search Console + GA data.
- Search intent match — a perfectly optimised page with wrong intent loses to a weaker page with right intent.
- Freshness signals beyond what's in the HTML.
Treat SEO Compare as a fast on-page diagnostic. For full competitive analysis, pair it with backlink tools and Search Console data.
Need a full audit? Go to the RankNibbler homepage and enter any URL for a free 30+ point check.