Free tools / Stat and Source Checker
Free tool · citation checker
Stat and Source Checker
Every number on a page is a claim. Paste your copy or a URL and we find each statistic, check whether a source link sits beside it, whether that link still loads, and whether the figure is one of the AI-search stats we know are misquoted. It's the check every customer report of ours passes before it ships.
Sample result
What a result looks like
A real run on one of our own posts, tofubofu.com/blog/what-is-aeo-geo-vs-seo, 10 November 2026.
7 figures found. 4 have a working source link beside them; 3 need attention.
How it works
Figure, sentence, source, status
We find every statistic
Percentages, multipliers, money, ratios like 19 of 60, numbers with millions or billions, and comma-grouped counts. Bare years and small counts are left alone.
We look for a source beside it
A link in the same sentence, or anywhere in a paragraph that holds only one figure. A link back to your own site doesn't count as a source.
We check the source loads
Up to thirty outside links per run, every redirect checked. A dead link is marked dead; a site that refuses our check is marked unconfirmed, never dead.
We flag known misquotes
Figures from our registry of AI-search statistics that turned out to be wrong or misattributed when we read them at source. The result names one only when your own text contains it.
Reference
What counts as a statistic
Known misquotes are flagged too, from our registry of AI-search figures we read at source. We don't print those figures here: a page that repeats a wrong number, even beside its correction, is a page an engine can lift it from.
| Kind | Example | Checked? |
|---|---|---|
| Percentage | 51% of buyers | Yes |
| Multiplier | 3x faster | Yes |
| Money | $2 million | Yes |
| Ratio | 19 of 60 answers, 1 in 3 buyers | Yes |
| Large count | 1,076 respondents, 4 million pages | Yes |
| A year or a small count | 2026, five steps | No, these aren't statistics |
What to do with a result
What each result means, and what to do about it
| If the result says | It means | Do this |
|---|---|---|
| Sourced | A link beside the figure loads. | Open it once and confirm the figure is on that page, with the same scope and date. |
| No source nearby | Nothing in the sentence links to where the figure came from. | Link the publisher's own page in the same sentence, or cut the figure. |
| Source is dead | The link beside it answers 404 or the site is gone. | Find the publisher's current page, or an archived copy, and relink. |
| Only your own page | The figure links to your own site. | Link through to the original publisher from that page, or here. |
| Known misquote | The figure matches one that did not survive checking at source. | Use the publisher's real figure from its own page, or drop the claim. |
Why check every number before you publish?
Engines quote figures. A wrong number on your page can be lifted into an answer with your name beside it, and a buyer who checks it learns to distrust the rest. Our own registry exists because a figure we published turned out to be credited to the wrong publisher, and we found it live in dozens of places across our site.
This check is the cheap half of the fix. It can't read the source and confirm the figure is there; it tells you which figures have no source at all, which sources are dead, and which numbers have a known history. Reading the source is still a person's job.
This checks your site. It cannot tell you whether AI names you.
A free scan puts real buying queries to all five AI engines and shows who they name instead of you.
Check your AI visibility free →FAQ
Frequently asked questions
What counts as a statistic?
A percentage, a multiplier like 3x, an amount of money, a ratio like 1 in 3 or 19 of 60, a number with million or billion, a comma-grouped count like 1,076, or a phrase like three times. A year or a small count like five steps is not treated as a statistic.
What does 'nearby' mean?
A link in the same sentence as the figure. When a paragraph holds only one figure, any link in that paragraph counts. A footnote at the bottom of the page reads as unsourced here, so the result tells you which figures a reader can't trace on the spot.
Does it check the source says the same number?
No. It checks that a source link exists and loads. Confirming the figure is on the source page, with the same scope and date, needs a person to read it.
Why is a link marked unconfirmed rather than dead?
Many sites refuse automated checks with a 403 or a rate limit. That's not evidence the page is gone, so we say we couldn't confirm it and leave you to open it. Only a 404, a 410 or a site that doesn't exist counts as dead.
Where does the misquote list come from?
From our own registry of outside statistics, kept so a corrected figure can't creep back onto our pages. Each entry was read at the publisher's own source. Figures we've cleared there clear here too.
How many figures and links does one run check?
Up to sixty figures and thirty outside links. A long page past that is a sign to check it section by section.
Can I paste text with links?
Yes. Markdown links like [G2](https://...) and bare URLs both count. Plain text with no links will show every figure as unsourced, which is often the honest result.
Is this free?
Yes, no signup. What we sell is measuring whether five AI engines name you when buyers ask, and writing pages built to be cited.
Sources
Sources and further reading
- G2, The Answer Economy: 2026 AI Search Insight Report: the 51% and 29% figures in the sample, n=1,076 B2B software buyers
- Aggarwal et al., GEO: Generative Engine Optimization: the 40 percent figure in the sample