Bulk Website Authority Checker

What checking authority in bulk is actually for

Nobody needs fifty scores for curiosity. An authority list gets checked when a decision hangs on the comparison, and the three that come up over and over are prospect vetting, competitor sizing and portfolio triage. In each of them the number that matters is not any single row but the shape of the set.

The single-domain website authority checker answers the same question for one site with more room for the explanation. This page exists because the question almost never arrives alone: a prospect sheet is twenty rows before anyone has vetted it, and checking them one at a time is how the vetting quietly stops happening.

How to read a column of authority scores without fooling yourself

An authority score is easy to look up and easy to misread, and the misreadings get more expensive in bulk because a whole list inherits them at once. Three properties of the metric do most of the damage.

• The scale is logarithmic. Each step up represents more additional link equity than the step before, so 4 is not twice 2 and the distance from 6 to 7 is a different world from 2 to 3. Averages over a wide spread describe nobody, which is why the tool leads with the median.
• It measures links and nothing else. The score counts referring domains and their strength, and each row shows that raw count beside the score. Traffic, rankings, content quality and topical relevance are invisible to it, and every one of those matters more for a link decision than the score does.
• It is relative, not absolute. A score of 3.5 is strong in a local niche and weak nationally. The comparison that means something is against the other domains on your list, which is a comparison you can only make when they are in one table.
• It is not a Google metric. Neither Open PageRank, Ahrefs DR nor Moz's Domain Authority is used by Google for anything. They are third-party estimates that correlate with ranking ability, and correlation is all they claim.

Where the numbers come from, and what the tool does with your list

Every lookup reads the Open PageRank index, built by running a PageRank-style calculation over Common Crawl's public link graph. Both the data and the method are open, so the number can be checked rather than taken on faith. The tool adds the handling a pasted list needs and reports what it did, so no row is a mystery.

• Every input becomes a domain first. Authority belongs to the domain, so example.com/blog/post and https://example.com are the same lookup. Repeats are marked on their rows rather than silently dropped, and the set statistics count each domain once.
• No data is reported as no data. The index returns nothing rather than zero for a domain the crawl has not seen. Writing a zero would invent a fact; the tool says which it found.
• One call per batch, not one per domain. The index answers up to a hundred domains at once, so a full run is a handful of requests rather than fifty, and results land in batches rather than trickling in row by row.
• Refusals are named, not hidden. When the index refuses a batch, the rows say so and tell you to rerun them in a minute, because a refused lookup is not a score of zero either.

What the tool deliberately does not do is score, grade or rank your list. The authority number arrives as a number already; the honest additions are the median, the spread and the flags, and the decision stays yours.

How to check website authority in bulk

Seven steps, ordered so the mechanical reading happens before the judgement calls.

1. 01

   Paste a list that answers one question

   A prospect sheet, the domains linking to a competitor, or the sites in one niche. The findings this tool makes are about the set, so a list assembled around one decision reads better than a grab bag.

2. 02

   Paste URLs if that is what you have

   Every input is reduced to its domain before the lookup runs, because authority is a property of the domain. Ten pages from one site become one lookup and one row marked as a repeat, not ten spent lookups.

3. 03

   Read the median before the mean

   The scale is logarithmic, so one 8.5 outlier drags an average upward past every real domain on the list. The median is the number that describes the site in the middle of your set.

4. 04

   Judge domains against the set, not against 10

   A score of 3.5 is weak next to Wikipedia and strong in a local niche. The useful comparison is the spread on this list: the outliers at both ends are the rows worth opening.

5. 05

   Treat a high score on a thin site as a flag, not a win

   The score measures links, not quality. A site with a strong score and no traffic, no rankings and no real content usually got its links somewhere you do not want yours coming from.

6. 06

   Separate no data from a low score

   The index returns nothing rather than zero for a domain the crawl has not seen. A missing score usually means a very new or parked domain, which is a different fact from a score of 0.5.

7. 07

   Export and join it to the data the score cannot see

   The score knows nothing about traffic or relevance. Take the CSV into a sheet next to traffic estimates and topical fit before anything on the list gets an outreach email.

For the outbound half of the same audit, the external link checker reads which sites a page links out to, and the broken link checker finds the links on your own pages that lead nowhere. The single-domain authority checker remains the quicker path when the question is one domain.

What this checker reports

Frequently asked questions