Comparison
OnPageX vs Detailed SEO Extension
Two popular one-click SEO analyzers for Chrome. One shows data, the other turns it into action. Here's how they compare in 2026.
Detailed SEO Extension
450,000+ users
Featured
// feature comparison
| Feature | OnPageX | Detailed SEO Extension |
|---|---|---|
| SERP Preview | Yes (Pro) — see how your page appears in Google | No |
| Competitor Comparison | Yes (Pro) — compare two pages side by side | No |
| Bulk Page Analysis | Yes (Pro) — analyze multiple pages at once | No |
| Analysis History | Yes (Pro) — track changes over time | No |
| PDF / CSV Export | Yes (Pro) | No |
| Schema.org Detection | Yes — visual JSON-LD tree | Yes — basic detection |
| Meta Tag Analysis | Yes — with character count & scoring | Yes — with character count |
| Header Structure (H1-H6) | Yes — hierarchy check | Yes |
| Image Alt Audit | Yes — missing alt detection | Yes |
| Link Analysis | Yes — internal, external, nofollow | Yes — link counts |
| Color-Coded Scoring | Yes — 9 categories (Good/Attention/Critical) | No (data only) |
| Japanese Language | Yes | No (English only) |
| Open Graph / Twitter Card | Yes | Yes |
| Price | Free / Pro $9.99 one-time | Free |
// why choose OnPageX
SERP Preview
See exactly how your page will appear in Google search results before publishing. Detailed SEO Extension doesn't offer any preview functionality.
Competitor Page Comparison
Compare the SEO profile of two pages side by side — perfect for analyzing why a competitor outranks you. A unique Pro feature not found in Detailed.
Bulk Analysis
Analyze multiple pages at once to find site-wide SEO issues. Detailed only works one page at a time.
Actionable Scoring System
OnPageX scores 9 SEO categories with color-coded indicators (Good/Attention/Critical). Detailed shows raw data without prioritization.
Analysis History
Track your SEO improvements over time. Re-check a page next week and see what changed. Detailed has no history feature.
// why choose Detailed SEO Extension
Massive User Base
450,000+ users and years of development provide extensive community trust and a proven track record.
Completely Free
All features are free with no Pro tier. OnPageX's advanced features (SERP preview, comparison, bulk) require a $9.99 one-time purchase.
Featured Badge
Chrome Web Store Featured status signals quality verification by Google.
Lightweight Core
Focused on displaying metadata quickly without complex scoring or analysis layers.
// verdict
Detailed SEO Extension is a solid free tool for quickly viewing meta tags and basic SEO data. But if you need actionable insights — SERP previews, competitor comparisons, bulk analysis, and historical tracking — OnPageX goes significantly further. The one-time $9.99 Pro upgrade pays for itself the first time you catch a ranking issue that Detailed would have missed. For SEO professionals and serious site owners, OnPageX is the more complete toolkit.
// faq
Is OnPageX free?
Yes. OnPageX's core features — meta analysis, header structure, schema detection, image audits, and link analysis — are completely free. Pro features like SERP preview and competitor comparison are a one-time $9.99 purchase.
Can I use both extensions at the same time?
Yes. Both extensions work independently and don't conflict. Many SEO professionals use multiple tools to cross-reference data.
Does OnPageX slow down page loading?
No. OnPageX only activates when you click the extension icon. It doesn't inject scripts or monitor pages in the background.
Is the $9.99 Pro a subscription?
No. It's a one-time purchase that unlocks all Pro features permanently, including future updates.
Which is better for SEO beginners?
OnPageX's color-coded scoring system (Good/Attention/Critical) makes it easier for beginners to understand what needs fixing. Detailed shows raw data that requires more SEO knowledge to interpret.
Ready to try OnPageX?
Install OnPageX for free and see how it compares.
