Paraphrasers and humanizers
Two kinds of rewriting tools. Paraphrasers change wording for clarity, tone or length. Humanizers are sold on one promise: that the rewritten text will pass a detector. The second group is why marks and detectors keep changing.
Paraphrasers
| Tool | Free use | Rewrites | Languages | Built for |
|---|---|---|---|---|
| QuillBot | Yes, 125 words per pass | Sentence to document, many modes | Many | Students and general writers |
| Wordtune | Yes, 10 rewrites a day | Sentence level | English first | Everyday writing |
| Grammarly | Yes | Light rewording | English | Everyone; adds authorship tracking |
| DeepL Write | Yes, limited | Sentence and paragraph | English and German strongest | Non-native and professional writers |
| LanguageTool Paraphraser | Yes, limited | Sentence level | Many | Multilingual writers |
| Scribbr Paraphrasing Tool | Yes | Sentence and paragraph | Several | Students |
| Hemingway Editor | Yes (web) | Readability, not rewriting | English | Editors |
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The most used paraphraser. Modes for fluency, formality, simplification, expansion and shortening, plus a grammar checker, summarizer and citation generator.
quillbot.com, checked 2026-10-31 -
Sentence-level rewrites with casual and formal options, as a web app and browser extension.
wordtune.com, checked 2026-10-31 -
Grammar and clarity first, with a paraphrase feature. The right choice when you want fewer changes rather than a full rewrite.
grammarly.com, checked 2026-10-31 -
Style and tone rewriting from the translation company. Strong on English and German, with alternatives offered per sentence.
deepl.com, checked 2026-10-31 -
Paraphrasing on top of an open-core grammar checker, available in many languages.
languagetool.org, checked 2026-10-31 -
A student-oriented paraphraser that pairs with Scribbr's citation and plagiarism tools.
scribbr.com, checked 2026-10-31 -
A readability editor rather than a paraphraser. It shows what to cut and which sentences are hard to read, which is often what a draft actually needs.
hemingwayapp.com, checked 2026-10-31
Humanizers
Listed so the landscape is complete, not as a recommendation. Each is a subscription rewriter whose marketing centres on passing AI detectors. Read the notes below the list before paying for any of them.
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The largest vendor in the category, with a bundled detector check.
undetectable.ai, checked 2026-10-31 -
Rewriter and essay generator marketed on detector results.
stealthgpt.ai, checked 2026-10-31 -
Rewriter with a built-in detector score.
writehuman.ai, checked 2026-10-31 -
One module of a larger writing suite.
hix.ai, checked 2026-10-31 -
Student-oriented rewriter with a detector check.
phrasly.ai, checked 2026-10-31 -
Rewriter marketed on multiple detector results.
humbot.ai, checked 2026-10-31 -
Rewriter aimed at students and marketers.
walterwrites.ai, checked 2026-10-31
What to know before paying
- Detectors now train on humanizer output. Turnitin added bypasser detection in August 2025 and Pangram reports high detection of humanized text. A rewriter that passed in 2024 can score as AI in 2026, and vendors rarely publish dated results.
- A paraphrase removes a watermark but does not remove the record. Google Docs history, Turnitin's typing replay, draft files and retrieval of prior model outputs are all used as evidence alongside scores.
- Academic integrity policies treat submitting rewritten model output as the student's own work as misconduct, whatever the score says.
- The model providers' own policies apply to anyone building a rewriter on their APIs. Both Anthropic's and OpenAI's usage policies restrict deceptive uses, including presenting generated text as human work.
- Google Ads prohibits advertising academic-dishonesty services, which is why this market is driven by affiliate reviews and search rankings rather than independent testing.
- The law is moving. The EU Code of Practice asks signatories to keep marks as non-removable as they can, and California's AI Transparency Act bars large platforms from knowingly stripping provenance data from January 1, 2027.