The product
What the DeepSeek research paper checker does
This tool reads a section of a research paper and reports the phrasing habits specifically associated with DeepSeek's academic writing, named and explained rather than compressed into one score. DeepSeek's output tends to carry more visible traces of its own reasoning process than some other assistants: leftover step markers such as first we consider or we can see that, sitting inside a paragraph meant to read as finished prose.
It is a server tool by necessity. The pattern model doing the scoring is too large to run in a browser, so the text is sent to our server, forwarded to the model for the run, and the result returned. Nothing from that run is stored afterward. Each check accepts between 1 and 12,000 characters, and you get 5 free checks in any rolling 24 hours.
The output is a list, not a percentage. A checker that returns a bare number is asking for unearned trust; this one names each pattern so the reasoning stays open to inspection rather than taken on faith.