Duplicate Content Detector
Find every page on the web that copied, scraped, or paraphrased your content. Uses the same fingerprint-sentence technique Copyscape pioneered — at a fraction of the cost.
98% match accuracy with Copyscape results. Powered by real-time Google search.
How It Works — Re-engineered Copyscape
Same 4-step pipeline Copyscape uses internally. We just made it transparent and cheap.
1. Input Content
Paste a URL or raw text. We auto-extract clean readable content using Trafilatura.
2. Extract Fingerprints
8 most distinctive sentences selected using TF-IDF scoring. Boilerplate filtered out automatically.
3. Exact-Match Search
Each fingerprint becomes a quoted Google query: "sentence" -site:yourdomain. Same technique as Copyscape.
4. Aggregate & Score
URLs matching 2+ fingerprints flagged as duplicates. Overlap % calculated like Copyscape similarity score.
Why This Beats Copyscape
URL or Text Input
Paste your blog URL and we extract content automatically, or paste raw text directly.
Smart Sentence Selection
TF-IDF scoring picks the most distinctive, searchable sentences. Skips intros, CTAs, common phrases.
Risk Scoring
Critical / High / Medium / Low — based on % of fingerprints matched. Mirrors Copyscape similarity rating.
Per-Fingerprint Detail
See exactly which sentence appeared on which external page. Verify matches manually with one click.
8x Cheaper than Copyscape
Uses your own Google search quota via OpenWebNinja. No per-query Copyscape fees.
Own Domain Excluded
Your own URL automatically excluded so you only see external copies.
Check your content now
Paste a URL or your article text. Get a complete duplicate-content report in under 30 seconds.
Run Duplicate Content Check