PaperBleach

Undetectable AI

Undetectable AI is a content analysis suite built around two core tools: an AI detector that scans text and flags specific AI-generated sentences, and an AI Humanizer that rewrites those flagged sections with more varied sentence structure and vocabulary. The site also ships an AI image detector, plagiarism checker, paraphraser, essay writer, and an SEO content writer, plus a Chrome extension for using the tools directly in the browser.

AI Detector & Humanizer

AI Detective is a cross-platform app that detects AI-generated text from a camera, pasted text, files, or website URLs. It also includes a humanizer to rewrite text as more human-like, plus readability and plagiarism checks.

SpeedAI科研小助手

SpeedAI是专业的科研写作辅助平台，专注于AIGC检测和降重降AIGC率。平台提供智能降重、降AI检测率、学术润色等一站式科研工具，帮助用户高效降低论文重复率和AI痕迹。该平台支持模拟知网、维普、万方等主流查重系统，检测结果与官方误差小于10%，准确性高达99%。SpeedAI已服务超过150万用户，处理字符数超过300亿，获得清华大学、北京大学等众多高校学生的认可。平台提供免费试用额度，每日可免费进行5次AIGC检测，参与活动可获取6万字免费降重额度。SpeedAI采用先进的AI模型，降重后保持逻辑通顺，降AIGC率可降至10%以下，并支持全文一键修改，快速出结果。

AI Detect

AI Detect is a web-based platform that combines a powerful AI detector with an AI humanizer, allowing users to identify AI-generated text and rewrite it to appear more human. The service claims 99% accuracy on major AI models like ChatGPT, Google Gemini, Claude Opus, Meta LLaMa, and Mistral AI, making it a go-to tool for verifying content authenticity. Beyond detection, AI Detect provides readability and grade level scoring, helping users refine their content for clarity and target audiences. With a free tier and flexible weekly, monthly, or yearly plans, it is designed for students, writers, marketers, and businesses seeking to maintain content originality and trust in an age of generative AI.

Wrizzle AI

Wrizzle AI is an all-in-one writing assistant designed to help users write faster, smarter, and more efficiently. The platform brings together several AI-powered writing tools in one simple web interface, from generating brand-new content to refining existing text. It positions itself as a complete writing toolkit for anyone who needs quick, high-quality writing help without friction. The core tools include an AI Writer powered by GPT-5.6 Luna, an advanced AI model for more complex tasks, an AI Detector for analyzing text, an AI Humanizer for making AI-generated content sound more natural, and ChatPDF for interacting with PDF documents. The free tier offers 5 AI generations per day, 1,000 words of AI detection, 250 words of humanization, and 5 ChatPDF uses. Notably, Wrizzle AI requires no login or sign-up, so users can start writing instantly. The service is aimed at a broad audience including freelance writers, bloggers, students, non-native English speakers, and small business owners. Testimonials highlight its value for polishing English writing, meeting tight deadlines, writing social media posts and product descriptions, and organizing academic essays. A strong emphasis is placed on privacy: Wrizzle AI states that it does not store user data and wipes everything when the page is closed.