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The keyword field is the box most authors fill in last, usually with words lifted straight out of the title. Every one of those is a wasted slot. Here is what earns a slot instead, how to check a candidate term against a controlled vocabulary, and how to test one before the form is submitted.
Every guide defines the four letters and stops there. The part that decides whether an AI-assisted page ranks is which of the four a draft can carry unaided. Three of them survive an automated workflow. One cannot be generated at all, and supplying it is a research job rather than a writing job.
Phrasly is an AI humanizer and stealth writer with a document editor, a paraphraser and an API behind one login, starting at 550 free words without a card. This review judges it for academic work, where citations, instrument names and reported statistics have to survive the pass intact. It also examines its claim to bypass Anthropic's watermark, a much harder thing to promise than the marketing suggests.
The submission field caps at 250 words and the abstract runs to 341. Cutting works from cheapest to most expensive: background sentences and hedges first, compression second, and content only once the first two passes have run out. Here is the order, with the limits eight journals actually publish.
StealthGPT is a stealth writing tool built for students, SEO writers and copywriters, and it is one of the few vendors to publish detector figures with a stated sample size: 98% human on Turnitin and 95% on GPTZero, each across 30 documents. Its 20,000 word single run is a real advantage for long files. This review covers those figures, the refund guarantee, and what the engine does to citations, terminology and register in an academic document.
Turnitin says its AI writing indicator already covers text run through a humanizer. What that claim does and does not mean, why a humanized document sometimes still scores high and sometimes does not, and what the number is worth to a student either way.