SupWriter is a writing tool that helps users turn AI-assisted drafts into clear, natural writing while preserving the original meaning and the user's own tone. It is mainly aimed at students and non-native English writers.
Main capabilities
- Humanizing rewrite: rewrites output from mainstream AI models such as ChatGPT, Claude, and Gemini to sound more like human writing, and adapts it to different industries and use cases.
- AI detector: built-in AI detection that can check drafts before submission, with sentence-level highlighting in the detection results. According to the official description, the detection result is a pre-check based on a single scoring model, differs from the detectors used by schools or clients, varies by detector, text length, and topic, and no tool can guarantee the result. This detector is free in paid plans.
- Paraphrasing: offers five paraphrasing modes to rewrite sentences while preserving their meaning.
- Grammar check: offers three grammar modes—Basic, Thorough, and Style—ranging from a quick spelling check to comprehensive readability rewriting.
- Content types: tuned for 16 content types such as essays, emails, blog posts, research papers, and cover letters.
- Multilingual support: supports humanizing, paraphrasing, and grammar checking in more than 50 languages, including English, Hindi, Japanese, Arabic, and more.
How to use it
- All features are centralized in one workspace, with history and credits clearly visible.
- Can be used in Claude, ChatGPT, Cursor, VS Code, and any MCP client through the MCP connector.
- Can also be called from your own code through the REST API.
- Fix Selection feature: while writing, highlight any sentence to improve it, fix grammar, or shorten the content.
- The free version offers a 300-word allowance and requires no credit card. Paid plans provide more features and can be canceled at any time.
Use cases
- Students and academic writing: turn AI-assisted drafts into clear academic writing that preserves the original meaning, suitable for essays, research papers, and more.
- SEO and content teams: generate content in bulk that reads as if written by a great writer and complies with search engine quality guidelines.
- Business professionals: refine client proposals, internal memos, emails, reports, and presentations so they are professional and natural.
- Educators and trainers: create teaching materials such as lesson plans and training guides to make the content more human.
- Legal and compliance: draft contracts, briefs, and legal documents that read naturally while maintaining precision.
- Researchers and scholars: polish research papers, grant applications, and academic publications while maintaining academic integrity.
Limitations and notes
- When using it, you should comply with your school's or employer's AI usage rules.
- The AI detector is only a pre-submission pre-check based on a single scoring model, is not the detector used by schools or clients, and the result is for reference only and cannot be guaranteed.
- Regarding specific pricing, details of each paid plan, the complete feature scope of the free version, and other information, the official text does not provide clear details, so they are not provided here.
- The official text states that more than 9,000 students, researchers, and content writers worldwide have used it, but it does not provide guarantees of results or specific comparison data with other tools.
