Free SEO tool · no sign-up
Free Domain Authority Checker
Check the authority of any domain — yours or a competitor’s. Get a domain rank score (0–100) plus referring domains and total backlinks, from real backlink data. Free: 3 lookups per day.
What is domain authority?
Domain authority is a score (here, Domain Rank, 0–100) that estimates how strong a site is in search, based largely on the quantity and quality of backlinks pointing to it. Higher-authority sites tend to rank more easily, even for competitive terms.
It is most useful for comparison: sizing up competitors, vetting link prospects, and understanding why certain pages outrank you.
How to use authority data
- Benchmark competitors — see how your authority compares to who ranks for your keywords.
- Referring domains matter most — the number of unique linking sites is a stronger signal than raw backlink count.
- Vet link opportunities — prioritize outreach to authoritative, relevant sites.
- Set realistic targets — pair this with keyword difficulty to choose winnable terms.
Frequently asked questions
Is this the same as Moz Domain Authority?
It is a comparable concept — a 0–100 authority score driven by backlinks — but calculated from its own backlink index, so the exact number differs from Moz DA or Ahrefs DR. Use it for relative comparison.
Why do referring domains matter more than total backlinks?
Ten links from ten different reputable sites signal far more authority than a thousand links from one site. Search engines weigh the diversity and quality of linking domains heavily.
Why is there a daily limit?
Backlink data is expensive to query, so the free checker allows 3 lookups per day. Writelio includes domain and competitor analysis in the full platform.
Can I check my competitors?
Yes — enter any domain, not just your own. Comparing your authority against competitors is one of the most useful ways to use this tool.