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Citation Gap Checker

Free, no signup. Find claims that need a source before an answer engine repeats them, and flag dated evidence for a human re-check.

Built by Patrick Stox

Before

“Studies show conversion rose 42% in 2021.”

After

“A 2021 study reported a 42% increase [source]” — then verify the statistic remains applicable.

Pasted content is analyzed in your browser. A URL is sent only to the protected fetch endpoint; paste content takes priority. After a successful URL check, only its domain is remembered locally.

Checks run from our server; we fetch the URL you enter and don't keep the results. The claim pass runs in your browser. Up to 25 cited URLs are sent to the bounded status checker; pasted prose is not sent. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.

Feedback
Report a bug

Found something broken in Citation Gap Checker? Let us know what happened — this goes straight to a private triage queue, not a public list.

What will be sent 
 No tool inputs, uploads, pasted source, complete results, query parameters, or URL fragments are attached automatically. You can edit or remove the selected passage above. Browser and anti-abuse metadata is processed for spam prevention. 
  
 
  
 
 
  
 
 
  
 
Sample report Deterministic local example
 
For “A 2021 study shows checkout changes increased conversion by 42%.”, evaluated in 2026, the engine returns one likely claim and two findings:
 
1 likely claim checked · 2 findings
Missing adjacent source — This claim has no adjacent outbound source link.
Aging evidence — This numeric claim references evidence at least three years old; confirm it still applies.
 
Both findings can be true at once: the sentence needs a source, and the source’s continued applicability needs checking.
 
 
 
How to use it
 
  1. Paste article text or HTML. The content extractor removes markup before sentence analysis.
  2. Select Check citation gaps.
  3. Review every highlighted sentence; use the search link as a research starting point, not as evidence.
  4. Add the most direct primary source beside the claim, or revise the claim when no suitable evidence exists.
 
 
      
     
 
What the results mean
 
  • Missing adjacent source — a likely factual claim contains no URL in the same sentence.
  • Aging evidence — a detected year is at least three years behind the current year.
  • Broken citation / Verify citation — supported by the engine when link-status evidence is supplied, but live status is not evaluated by this page.
  • No finding — no matching pattern was found; it is not an accuracy certificate.
 
How it works
 
The claim pass runs in the browser. It extracts readable blocks, splits them into sentences, and selects likely claims using explicit markers: numbers, percentages, research language, and strong superlative or absolute wording. It checks the same sentence for an HTTP(S) URL, extracts four-digit years, and sends at most 25 cited URLs to the bounded status checker. Evidence at least three years old receives a review flag. No model writes or judges the result.
 
Features
 
  • Accepts plain text or HTML.
  • Finds numerical, comparative, absolute, and research-style claims.
  • Separates missing sourcing from aging-evidence review.
  • Builds a prefilled source-search query for each finding.
  • Keeps pasted content in the browser.
 
Limitations
 
Adjacency is a crude proxy: a URL in the sentence may be irrelevant, while a footnote or nearby citation may be perfectly valid but still missed. The three-year threshold is intentionally generic. The bounded status check does not read papers, assess source quality, or determine whether a citation entails the exact claim. Always verify the primary source and the claim’s scope yourself.
 
Frequently asked questions
What counts as a likely claim?
The checker conservatively looks for sentences with numbers, percentages, research language, or strong comparative and absolute terms such as best, largest, always, and proves. Short fragments are ignored.
Does the tool verify that a citation supports a claim?
No. It does not fetch links or interpret source material. It only checks whether a likely claim has an adjacent URL and whether dated evidence merits a new human review.
Why is a three-year-old statistic flagged?
Three years is a review trigger, not an expiration date. Some evidence remains valid for decades; volatile market, product, and behavior statistics can become stale much sooner.
Can a clean report prove an article is accurate?
No. A clean result only means the local heuristics did not find one of their known patterns. Qualitative assertions, misleading framing, and irrelevant sources still require editorial review.
Does the checker detect broken citation links?
Yes. After the local claim pass, the page sends up to 25 cited URLs to the bounded status checker. A failed status can flag a broken citation or a DOI that needs manual verification; source relevance still requires human review.
 
 
Next stepQuotability & Entity-Preserving Rewriter — generate the corrected version.

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Feature requests for Citation Gap Checker
 

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Tentang alat
pemeriksa conservatively terlihat untuk sentences dengan numbers, percentages, riset bahasa, atau strong comparative dan absolut ketentuan seperti sebagai best, largest, always, dan proves. Short fragmen adalah diabaikan.
Tidak. Ini tidak ambil tautan atau interpret sumber material. Ini hanya memeriksa apakah kemungkinan klaim memiliki adjacent URL dan apakah dated bukti merits baru human tinjau.
Apa counts sebagai kemungkinan klaim?
Fitur
  • Home › Alat › Citation Gap Pemeriksa
  • Tempel article teks atau HTML Periksa citation gaps
  • klaim lulus berjalan secara lokal dan terlihat untuk numerical, comparative, dan riset-style claims. Up untuk 25 cited URLs dapat lalu terima dibatasi status periksa. alat tidak dapat determine apakah dapat dijangkau sumber supports klaim; gunakan pencarian-nya rujukan untuk verifikasi relevance dan accuracy.
  • klaim lulus berjalan di browser. Ini mengekstrak readable memblokir, splits mereka menjadi sentences, dan selects kemungkinan claims menggunakan eksplisit markers: numbers, percentages, riset bahasa, dan strong superlative atau absolut wording. Ini memeriksa sama sentence untuk HTTP(S) URL, mengekstrak four-digit years, dan mengirim di paling 25 cited URLs untuk dibatasi status pemeriksa. Bukti di least tiga years lama menerima tinjau flag. Tidak ada model menulis atau judges hasil.
  • Accepts plain teks atau HTML. Menemukan numerical, comparative, absolut, dan riset-style claims. Memisahkan hilang sourcing dari aging-bukti tinjau. Membangun prefilled sumber-pencarian kueri untuk setiap Temuan. Mempertahankan ditempel konten di browser.
Cara kerja
Gratis, tanpa pendaftaran. Temukan claims yang perlu sumber sebelum jawaban mesin repeats mereka, dan flag dated bukti untuk human re-periksa. Mengapa adalah tiga-year-lama statistik flagged? Melakukan alat verifikasi yang citation supports klaim? Melakukan pemeriksa detect rusak citation tautan?
Batasan
  • Tempel article teks atau HTML. konten extractor menghapus markup sebelum sentence analysis. Pilih Periksa citation gaps. Tinjau setiap highlighted sentence; gunakan pencarian tautan sebagai riset starting titik, tidak sebagai bukti. Tambah paling langsung utama sumber beside klaim, atau revise klaim ketika tidak ada suitable bukti ada.
  • Citation Gap Pemeriksa
  • Adjacency adalah crude proxy: URL di sentence mungkin menjadi irrelevant, sementara footnote atau nearby citation mungkin menjadi perfectly valid tetapi masih terlewat. tiga-year threshold adalah dengan sengaja generik. dibatasi status periksa tidak baca papers, assess sumber kualitas, atau determine apakah citation entails tepat klaim. Always verifikasi utama sumber dan klaim’s cakupan Anda.
  • Temukan tidak didukung claims, aging statistics, dan citations yang merit langsung verifikasi.
Pertanyaan umum
Mengapa adalah tiga-year-lama statistik flagged?
Melakukan alat verifikasi yang citation supports klaim?
Melakukan pemeriksa detect rusak citation tautan?
Tiga years adalah tinjau trigger, tidak expiration tanggal. Beberapa bukti tetap valid untuk decades; volatile market, produk, dan perilaku statistics dapat become usang much sooner.
Dapat bersih laporan buktikan article adalah accurate?
Hilang adjacent sumber — kemungkinan factual klaim berisi tidak ada URL di sama sentence. Aging bukti — detected year adalah di least tiga years di balik saat ini year. Rusak citation / Verifikasi citation — supported oleh mesin ketika tautan-status bukti adalah yang diberikan, tetapi langsung status tidak dievaluasi oleh halaman. Tidak ada Temuan — tidak ada mencocokkan Pola adalah ditemukan; ini tidak accuracy certificate.
Tidak. bersih hasil hanya berarti lokal heuristics tidak temukan satu dari mereka diketahui pola. Qualitative assertions, menyesatkan framing, dan irrelevant sumber masih require editorial tinjau.
Ya. Setelah lokal klaim lulus, halaman mengirim up untuk 25 cited URLs untuk dibatasi status pemeriksa. gagal status dapat flag rusak citation atau DOI yang needs manual verifikasi; sumber relevance masih memerlukan human tinjau.