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Domain Authority, Page Authority, Spam Score, Backlinks, and Keyword Difficulty all in one place. No account required for your first check.
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Everything You Need to Analyze SEO Authority
From domain authority to keyword difficulty, we give you the data to make smarter SEO decisions.
Measure a site's overall SEO strength on a 0–100 scale. Benchmark against competitors.
Detect penalty risks with Moz's proprietary spam score indicator before you build links.
See total backlinks, dofollow vs nofollow ratio, and referring domains for any site.
Check the ranking potential of any specific URL — not just the root domain.
Estimate how competitive it is to rank for any keyword before investing in content.
Analyze multiple domains simultaneously. Export results as CSV for client reporting.
How It Works
Get domain authority metrics in 3 simple steps
Type any domain or URL into the search bar above.
We query the Moz API and return all key SEO metrics in seconds.
Use the insights to improve your SEO strategy and outrank competitors.
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Domain Authority Checker
Check DA, PA, Spam Score & Backlinks instantly. Powered by Moz API.
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Bulk Domain Authority Checker
Check 10+ domains at once — get Moz DA, PA & Spam Score in one click.
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Keyword Difficulty Checker
Find out how competitive any keyword is. Get KD score instantly.
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Domain Rating Checker
Ahrefs-style domain rating and backlink analysis powered by Moz metrics.
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On-Page SEO Checker
Full technical SEO audit for any web page to improve your Google rankings.
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Domain Age Checker
Check any domain registration history, age, and authority trust signals.
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"Finally a DA checker that doesn't require signup for every query. The bulk checker alone saves us hours every week."
Sarah K.
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"The robots.txt generator and domain age checker are exactly what I needed. Clean UI, no ads, instant results."
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- Page Authority
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200 searches/month
- 200 searches/month
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- CSV export
- Search history
- No API access
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2,000 searches/month
- 2000 searches/month
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- Bulk checker
- Priority support
- 2000 API requests/mo
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Unlimited searches
- Unlimited searches
- All SEO tools
- Bulk checker
- 5000 API requests/mo
- Priority support
 vs Domain Authority (DA).webp)
What Is Domain Authority & Why Does It Matter?
Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how likely a website is to rank on Google search result pages. Scores range from 1 to 100 — the higher your DA, the more authoritative your site appears to search engines.
Domain Authority (DA)
A Moz metric (1–100) predicting how well your entire website will rank in search engines. Calculated using link counts and MozRank.
Page Authority (PA)
A per-page version of DA — predicting that specific page's ranking power, rather than the whole domain. Useful for evaluating key landing pages.
URL Rating (UR)
Ahrefs' equivalent metric — measures the strength of a specific URL's backlink profile on a 0–100 logarithmic scale. UR in Ahrefs reflects the quality and quantity of dofollow links.
✅ Earn high-quality authority backlinks from high DA sites
✅ Publish consistent, long-form, original content
✅ Remove toxic links that raise your spam score
✅ Optimize your internal linking structure
✅ Improve page speed and Core Web Vitals
✅ Submit your sitemap and fix technical SEO issues
✅ Target high authority domains for guest posts
✅ Use dofollow link building from PR and outreach
Ahrefs DR vs Moz DA — What's the Difference?
Many SEOs ask: is Ahrefs Domain Rating the same as Moz Domain Authority? The short answer is no — they use different methodologies, different link indexes, and different scales, though both aim to predict ranking potential.
| Feature | Moz DA | Ahrefs DR | CheckSEORank |
|---|---|---|---|
| Score Range | 0 – 100 | 0 – 100 | 0 – 100 |
| Metric Type | Domain Authority | Domain Rating | DA + DR + UR |
| Link Index | Moz Link Explorer | Ahrefs Crawler | Moz API |
| Dofollow Focus | Partial | Yes | Yes |
| Spam Score | ✅ Yes | ❌ No | ✅ Yes |
| Backlink Count | ✅ Yes | ✅ Yes | ✅ Yes |
| Bulk Checker | Paid only | Paid only | ✅ Included |
| Free Checks | 10/month | 0 | ✅ 10 guest checks |
| Developer API | Paid only | Enterprise only | ✅ Up to 5,000 reqs/mo |
| SEO Score | DA only | DR only | DA + PA + SS |
When comparing Moz DA vs Ahrefs DR, keep in mind that a sudden drop in Ahrefs DR doesn't necessarily reflect a real ranking change — Ahrefs updates its index frequently, causing fluctuations. Similarly, did PA change with Ahrefs DA change? No — Moz PA is independent of Ahrefs.
All SEO Metrics Explained
Understanding your website authority score requires familiarity with multiple SEO signals. Here's what each metric means and why it matters.
Developed by Moz, spam score (0–100%) flags how likely a domain has spammy backlink patterns. A score above 30% warrants a backlink audit. High spam scores can signal penalty risk from Google.
Ahrefs Rank orders websites globally by the strength of their backlink profiles. A lower AR number = stronger site (Rank #1 is the strongest). It differs from Google PageRank and Alexa rank.
Domain age is one of Google's historical trust signals. Older domains with consistent content and clean backlinks tend to accumulate more authority. Use our free domain age checker to verify any domain.
MozRank measures link popularity while MozTrust measures how close your links are to trusted seed domains. Both contribute to overall Moz DA. The MozBar Chrome extension lets you check DA/PA on any page.
Not all backlinks are equal. Links from high authority domains (DA 70+) pass far more "link juice" than low-quality links. Our backlink checker helps you discover quality vs. spammy links.
Keyword difficulty (KD) estimates how hard it is to rank for a keyword. Combine it with domain authority data to identify attainable keywords. Lower KD + established DA = faster rankings.
The Best Domain Authority Checker — Free & Accurate
Whether you need to check a single domain or run an Ahrefs bulk checker-style analysis on hundreds of URLs, CheckSEORank gives you the most complete free website authority tool available — no login required for your first check.
Instant Moz Domain Authority check with DA rating 0–100
Check multiple domains at once — like Ahrefs bulk or PrePostSEO
Discover who links to any domain with full backlink data
Website spam score detection to protect your link profile
Check domain age alongside Google PageRank and Alexa rank data
Amazon keyword index checker & SEO keyword difficulty score
Per-page authority score plus DA vs PA comparison
Combined SEO authority score for any website
Used by 10,000+ SEOs, agencies, and domain investors worldwide
SEMrush vs Moz vs Ahrefs — Which DA Tool Should You Use?
The debate between SEMrush vs Moz and Moz vs Ahrefs domain ranking has been ongoing in the SEO community for years. Here's a concise breakdown to help you choose the right DA tool for your workflow.
Moz (DA/PA)
Moz pioneered Domain Authority. The MozBar extension for Chrome and the free Moz DA checker are widely used. Moz SEO pricing starts at $99/mo. Great for page-level analysis with Page Authority and Spam Score.
Best for: Link building, spam audits
CheckSEORank (Free)
CheckSEORank provides DA, PA, spam score, backlinks, and keyword difficulty — all powered by Moz's API — for free. The best domain authority checker for quick checks without a paid subscription.
Best for: Free checks, agencies, bulk analysis
Ahrefs (DR/UR)
Ahrefs uses Domain Rating (DR) and URL Rating (UR) instead of DA. Ahrefs free access is very limited. The Ahrefs site audit, find expired domains tool, and rank tracker are industry-leading but expensive.
Best for: Deep link analysis, rank tracking
Integrate Real-Time
SEO Metrics Into Your App
Get programmatic, high-speed access to Moz index metrics including Domain Authority (DA), Page Authority (PA), Spam Score, Backlinks, and Keyword Difficulty. Designed for developers, agencies, and SaaS platforms.
Flexible limits up to 5k/mo
Tiers tailored for Pro and Agency developer needs.
High-speed delivery
Up to 60 requests per minute rate limit with low latency.
curl -X GET \ -H "X-API-Key: YOUR_API_KEY" \ "https://checkseorank.com/api/v1/metrics?domain=example.com" // Response snippet { "success": true, "data": { "domain": "example.com", "da": 93, "pa": 76, "spam_score": 1 } }
Frequently Asked Questions
Common questions about domain authority, SEO metrics, and how to use CheckSEORank.
A DA score of 50+ is generally considered good. Scores of 60-80 are excellent and can rank for competitive keywords. New sites start around 1-5 DA and grow over time with quality backlinks. There's no universal 'good' — compare your DA to direct competitors in your niche.
Moz DA (Domain Authority) and Ahrefs DR (Domain Rating) are both link-based metrics on a 0-100 scale, but they use different link indexes and formulas. Ahrefs DR focuses heavily on the number and quality of unique referring domains. Moz DA also incorporates spam signals. They often differ significantly for the same domain — neither is definitively more accurate.
Ahrefs updates domain ratings frequently — typically multiple times per week. A sudden drop in Ahrefs DR can be caused by index refreshes, not necessarily a real ranking loss. Always check historical trends rather than reacting to single-day changes.
URL Rating (UR) in Ahrefs measures the link authority of a specific page on a 0-100 scale. It factors in the number and quality of backlinks pointing to that exact URL (dofollow only). It's the page-level equivalent of Ahrefs DR.
Moz calculates Domain Authority using a machine learning model that incorporates dozens of factors — including the number of linking domains, quality of links (MozRank), spam signals (spam score), and comparison with millions of other sites. It's updated regularly and should be treated as a relative, not absolute, score.
Yes, outbound links (external links) can help SEO by signaling topical relevance and providing context to search engines. However, excessive outbound links to low-quality sites can dilute link equity. Link to reputable, high domain authority websites where relevant.
Spam Score (developed by Moz) is a percentage (0-100%) indicating how likely a domain is to be penalized by Google based on correlations with penalized sites. Scores above 30% suggest auditing your backlink profile. High spam score domains may have bought low-quality links or been penalized previously.
Google Search Console provides basic backlink data under Links. For a more detailed analysis, use our free backlink checker. Majestic backlink checker, SE Ranking, and Ahrefs are paid alternatives. Google does not disclose its full index of links publicly.
Domain Authority (DA) scores your entire website's ranking potential. Page Authority (PA) scores a specific page's ranking potential. Both range from 0-100. A high DA site can have individual pages with low PA if those specific pages have few inbound links. Use both metrics together for the full SEO picture.
We offer a 30-day money-back guarantee for first-time purchases. However, please note that refunds are not available in certain cases, such as after high-volume usage of our API or searches, or after the 30-day period has elapsed.
API access is available on Pro (2,000 requests/month) and Agency (5,000 requests/month) plans with a rate limit of 60 requests per minute. Free and Starter plans do not include API access.
Yes — domains with high DA, high DR, and clean spam scores are more valuable in domain marketplaces. When selling a domain with high Ahrefs DR or Moz DA, document the backlink profile, traffic history, and age. Buyers pay premiums for domains with established domain authority and quality authority backlinks.
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