Free DA PA Checker and Domain Authority Checker
Domain Authority and Page Authority are widely used SEO industry metrics for evaluating the strength of websites and individual pages. Moz's Domain Authority is a 1–100 predictive score for a domain, while Page Authority applies a similar concept at the page level. Other SEO platforms use different metrics: Semrush calls its metric Authority Score and Ahrefs uses Domain Rating. These numbers are not interchangeable because each provider uses its own data and calculation method.
What Are DA and PA?
Domain Authority (DA) is a Moz metric designed to estimate how likely a domain is to rank in search results. It is measured on a 1–100 scale. Page Authority (PA) applies a similar predictive idea to an individual page. Both are third-party SEO metrics rather than Google Search metrics.
Authority metrics are useful for comparison and link-prospect research, but they should not be treated as Google's own ranking score. Google describes PageRank and other ranking systems as part of Search, while DA and PA are industry metrics created by SEO software providers.
DA vs PA vs DR vs Authority Score
| Metric | Provider | Scope | Typical use |
|---|---|---|---|
| DA | Moz | Domain | Compare estimated domain ranking strength |
| PA | Moz | Individual page | Compare estimated page-level strength |
| DR | Ahrefs | Domain | Evaluate backlink-based domain strength |
| Authority Score | Semrush | Website | Evaluate authority using backlink, traffic and other signals |
Because the providers use different datasets and formulas, a DA 40 should not be interpreted as equivalent to DR 40 or Authority Score 40. Use each metric within its own platform and compare websites using the same metric and similar context.
How to Use a DA PA Checker
- Paste one or multiple domains or page URLs into the input box.
- Click Check Domains.
- Review the normalized domain, protocol, HTTPS status, page path and technical audit.
- For actual Moz DA/PA values, use a live Moz-powered checker or an authorized API connected to your own application.
- Compare authority metrics alongside referring domains, link quality, organic visibility, topical relevance and the quality of the pages you are evaluating.
Why Real DA/PA Requires Data
A genuine DA or PA value cannot be calculated accurately from a domain name alone. Moz's metric relies on its own link index and machine-learning model. A tool that simply creates a number from domain length, TLD, page title or a random formula is not providing a real Moz DA or PA score.
This distinction matters for an SEO tool website. Showing invented authority values can make a checker look functional while giving users misleading data. ToolifyClub's browser version deliberately reports what it can actually verify locally and clearly separates that audit from third-party authority measurements.
Backlinks and Authority
Backlinks are an important input for many third-party authority metrics. Ahrefs' Domain Rating, for example, is based on the quantity and strength of external websites linking to a domain. Moz also uses link data for DA and PA. However, a backlink is not valuable simply because it exists.
For practical SEO work, examine the relevance and quality of linking sites, the context of the link, the page receiving the link, and whether the link was earned naturally. A large number of low-quality or manipulated links is not a substitute for a strong, useful website.
Does DA Affect Google Rankings?
DA and PA are not official Google ranking scores. Google documents its own ranking systems, including link analysis and PageRank, but it does not publish a Google DA or PA number for websites. Therefore, use DA and PA as third-party benchmarking metrics rather than as direct explanations for why a page ranks.
Google also has policies against link spam and manipulative link schemes. Buying links for ranking purposes, excessive link exchanges and automated link creation can violate Google's spam policies. Building useful content that naturally earns relevant references is a more sustainable approach than chasing an authority number alone.
Common DA/PA Checker Mistakes
1. Treating DA as a Google score
DA is created by Moz. It is not a Google Search Console metric or a Google ranking score.
2. Comparing different providers directly
DA, DR and Authority Score use different formulas. Compare like with like instead of assuming their numbers are equivalent.
3. Believing a high score guarantees rankings
Authority is only one way to benchmark link strength. Search visibility also depends on relevance, content, competition, technical factors and many other signals.
4. Using fake DA generators
A number produced without access to the underlying authority dataset is not a genuine third-party metric. Transparent limitations are better than fabricated scores.
5. Chasing backlinks at any cost
Google's spam policies cover manipulative link schemes. Focus on useful content and naturally earned links rather than automated or paid ranking manipulation.
Frequently Asked Questions
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Secondary keywords: free DA PA checker, website authority checker, domain authority tool, page authority checker online, SEO authority checker, bulk DA checker.
Related terms: Moz DA, Moz PA, Ahrefs DR, Semrush Authority Score, backlinks, referring domains, link building, website authority, SEO metrics.