# SupWriter Features

SupWriter is a four-in-one AI writing toolkit: humanizer, AI detector, paraphraser, and grammar checker. This page summarizes the full feature set.

Live page: [supwriter.com/features](https://supwriter.com/features).

## AI Humanizer

Rewrites AI-generated text so it reads as if written by a person and is not flagged by AI detectors.

- **Tones**: general, casual, formal, academic, persuasive.
- **Purposes**: general, essay, blog, email, social.
- **Word limits per request**: 500 (Free), 1,500 (Pro), 3,000 (Ultra).
- **Languages**: 50+ on Pro and Ultra; 20 on Basic; English on Free.
- **Targets bypass for**: Turnitin, GPTZero, Originality.AI, Copyleaks, Crossplag, Sapling, ZeroGPT, Grammarly, QuillBot, and 12 other detectors.

## AI Detector

Classifies text as AI-generated vs human-written. Reports a confidence score plus per-detector verdicts across 12 popular detection engines and a sentence-level breakdown.

- Detectors checked: Turnitin, GPTZero, OpenAI, Claude, Gemini, Grok, Grammarly, Crossplag, Copyleaks, QuillBot, Sapling, ZeroGPT.
- Use to verify human-written work before submission, or to audit content from contractors.

## Paraphraser

Rephrases text with five modes — standard, formal, casual, academic, creative — while preserving meaning. Useful for avoiding plagiarism, varying sentence structure, or matching a target tone.

## Grammar Checker

Fixes grammar, spelling, and punctuation. Two modes:

- **Standard** — corrects errors without changing the writing's voice.
- **Thorough / style** — improves structure, word choice, and clarity in addition to fixing errors.

## Cross-cutting

- **Chrome extension** — humanize text in any web text field (Google Docs, Gmail, LinkedIn, Notion, etc.).
- **History** — every humanization, paraphrase, and grammar check is saved to your account and viewable from the History page.
- **APIs** — humanize, paraphrase, grammar-check, and ai-detect are exposed as HTTP endpoints with OpenAPI specs at `/.well-known/openapi/*.yaml`.

## Compare

- [vs Undetectable AI](https://supwriter.com/undetectable-ai-vs-supwriter)
- [vs WriteHuman](https://supwriter.com/writehuman-vs-supwriter)
- [vs Humbot](https://supwriter.com/humbot-vs-supwriter)
- [vs Grammarly](https://supwriter.com/grammarly-vs-quillbot)
- [vs QuillBot](https://supwriter.com/quillbot-vs-writehuman)

## Pricing

See [pricing.md](https://supwriter.com/pricing.md) or the live [pricing page](https://supwriter.com/pricing).