01 · Paste a chapter or excerpt
Check a single chapter, several chapters in a row, or any passage you suspect you've written before.
Deep into a long novel, it's easy to rewrite the same action, the same inner thought, or the same description of a place. This checker first recalls candidates with bigram / LCS matching, then uses a semantic pass to judge similar passages and mark their locations and similarity.
Once your browser finishes loading, you'll land right in the working Duplicate Content Checker input and results area.
Check a single chapter, several chapters in a row, or any passage you suspect you've written before.
The text is split into paragraphs and sentences, similar wording is cross-checked, and anything that looks repeated is pulled up.
Each result shows where the two passages are, how similar they are, and what kind of repetition it is, so you can go straight to the right spot in your draft.
Catches exact repeats, partially copied lines, and sentences with only a few words changed but the same structure.
Uses longest common subsequence matching on longer sentences and passages, so lightly rewritten repeats don't slip through.
Rechecks high-similarity matches to see whether they really say the same thing, cutting false alarms from a character name simply appearing again and again.
Shows the paragraph and sentence numbers for each repeat, so you don't have to search the whole manuscript yourself.
Totals your overall duplication rate, highest similarity score, and high-risk pairs, so you can tackle the worst offenders first.
Run it before you publish a chapter to trim repeated passages, so readers don't feel like you're padding the word count.
No. It's built for fiction: it finds sentences, actions, and descriptions you reuse in your own chapters. It doesn't check against a web-wide database.
Bigram and LCS matching are fast and good at literal similarity. Semantic review catches passages that changed the words but kept the meaning, and cuts false alarms caused by recurring character names and story-bible details.
It's best for one chapter or a few chapters at a time. For a very long novel, check by volume or in batches of 3-5 chapters for clearer locations.
Take a look at anything above 0.75, and start with anything above 0.85. Action, inner thoughts, and setting descriptions repeat most often.
No. The check runs locally in your browser, so your text isn't uploaded or kept long term. You only get the repeat locations for this check.
These tools handle the concrete problems before you publish: typos, AI feel, naming, formatting, and duplicate content. When you need full-chapter generation, a knowledge graph, a three-level outline, and multi-model collaboration, sign up for Maliang Writer and carry your tool results into the complete studio.