AnyAIZero is a free AI writing tool that combines an AI humanizer and an AI detector in one workflow. The humanizer rewrites text from ChatGPT, Claude, and Gemini into natural, human-quality writing across 8 modes (Standard, Natural, Academic, Formal, Informal, Concise, Expand, Shorten) — restructuring sentences rather than just swapping synonyms. The built-in detector uses multi-dimensional analysis (sentence uniformity, transition density, readability variance, and more) to show you why a text reads as AI-generated, not just a percentage. Free with no signup: 3,000 words/day for the humanizer, unlimited free detection. Supports English, Spanish, and German. Text is processed in memory and never stored. Built for students, teachers, ESL writers, and content teams working with AI text.

AnyAIZero

Copyleaks is the integrity layer for your tech stack that helps organizations and individuals understand what’s human-made and original, AI-generated, or manipulated across text, image, audio, and video. Educators, publishers, and enterprises use it for AI detection and plagiarism checking. Its transparent AI Logic insights support human review, and it integrates with LMS platforms, the API, and the browser.

Copyleaks

Paula Salvidar

Grammarly is an AI writing assistant that checks grammar, spelling, punctuation, clarity, and tone. It works across email, documents, social media, and messaging apps to help you communicate more effectively.

Grammarly

StyleMimic is an AI-powered text engine that learns your personal writing style from a short 40-word sample. Instead of relying on generic prompts, it measures your sentence rhythm, vocabulary, and punctuation habits to draft high-quality LinkedIn posts, emails, articles, and replies that genuinely sound like you. Every draft is scored for style match and originality, ensuring your unique digital fingerprint remains intact.

StyleMimic

Frank

NovelShaft is a fiction-writing workspace for authors who want their manuscript, story notes, and AI conversations in one project.

Start with templates for characters, worldbuilding, outlines, scenes, and clues. Give the AI agent a concrete task, let it refer to your project materials, and follow its visible progress while it works. Review the result and decide what belongs in your story.

For example, an author can build character profiles, organize a scene plan, and ask the agent to help develop the next scene using the established notes. The workspace keeps planning and writing connected, with the author in control of the result.

Available on the web and iOS, with English and Japanese interfaces. An account is required. A free plan is available, with optional paid subscriptions for additional AI usage.

Watch the English walkthrough: https://www.youtube.com/watch?v=--2gVrU_cIg
Explore real screenshots: https://www.producthunt.com/products/novelshaft
iOS: https://apps.apple.com/us/app/novelshaft/id6796708818

The screenshots and video show fictional demonstration projects. Submitted by Yutaro Amano, maker of NovelShaft.

NovelShaft

Yutaro Amano

Cursive Generator is a free online tool for cursive text. Type any text and it converts it into copy paste cursive styles for bios and messages, or renders it in real open licence cursive fonts that you can download as PNG or SVG. It includes generators for names, signatures, tattoos, monograms and words, a cursive font generator, a printable cursive worksheet generator, a cursive alphabet guide and learning pages. Everything runs in the browser with no account.

Cursive Generator

Alex Kirillov

Operating as a dedicated text utility, AI Text Watermark Remover assists with cleaning AI-assisted drafts. It detects 60+ invisible Unicode code points while leaving visible wording untouched. Users can access a free Markdown cleaner to remove unwanted headings, quotes, lists, and emphasis tags. All free tools run inside your web browser without storing pasted text. Pro rewrite is available if simple deletion proves insufficient for your draft.

AI Text Watermark Remover

Evan Reed

Citation brings writing, sources, citations and references together in one workspace. Write and edit documents, organize sources, format citations and review writing suggestions beside your draft. Find source details using a title, URL, DOI or ISBN. Supported citation styles include APA, MLA and Chicago. Export options include DOCX, PDF and TXT, with BibTeX and RIS for reference exchange. Citation has a free plan, with usage limits on source additions, writing messages and similarity checks, plus optional paid upgrades.

Citation

Alptekin Can

Yila AI (https://yila.ai) is a research workspace and research agent for real academic workflows. Start from a research question, paper link, or uploaded PDF/Word/CSV, then run literature search, full-text grounded reviews, data analysis with reusable code/charts, scientific figures, posters, and paper-to-slides — with claims traceable to sources, no fabricated citations, and private-by-default editable outputs.

Yila AI

Yila SEO

AI Study Sheet goes beyond creating digital red study sheets. Import photos of textbooks, worksheets or notes, or add course PDFs. On-device AI suggests key terms to mask on the original page, preserving sentences, diagrams and context. Review and adjust the masks when needed—no need to recreate every page as flashcards.

Auto mode reveals answers after a short countdown so you can focus on remembering them. Prefer your own pace? Use Manual mode. After each session, rate what you remembered, felt unsure about, or did not remember. Study activity, self-ratings and review timing help the app suggest what to study next. Optional reminders and resumable sessions make it easier to return to your growing library.

Start with three free saved pages; completing your first study session permanently expands the free allowance to ten. Unlimited Saves is a US$9.99 one-time purchase in the US App Store, with no subscription. Check the App Store for the current price in your region. Material recognition and masking run on device. Optional Studyplus integration can record study duration after your authorization and consent.

The one-time price reflects continued improvements across successive updates, from masking setup to Auto study and ongoing review. Existing purchasers retain their access without additional charges.

For iPhone and iPad running iOS/iPadOS 16 or later.

App Store: https://apps.apple.com/app/id6782023263

AI Study Sheet

Masaki Iino

BidNinjas.ai is an AI-powered platform built for freelancers who want to win more projects with less effort. Generate personalized Upwork proposals in seconds, analyze job descriptions, optimize your freelancer profile, prepare for interviews, and improve your application success rate. BidNinjas helps freelancers save time, create higher-quality proposals, and stand out from the competition with AI-driven insights and automation tools.

BidNinjas.ai

BidNinjas

Stop guessing the YouTube algorithm. Audit video titles for mobile layouts, analyze tags, and generate high-retention script ideas instantly with data-driven creator tools.

GnorixX

Jitesh

RewriteAI is an AI humanizer that rewrites ChatGPT, Claude, Gemini, DeepSeek, Grok or Copilot output so it reads like a person wrote it, without losing the original meaning.

Most rewriters are prompt wrappers around a general-purpose model, which is why their output still trips detectors. RewriteAI runs its own model, trained on thousands of human-written texts, so the result is a deep rewrite rather than synonym substitution — sentence structure and rhythm change, not just word choice. The site reports a 99% bypass rate against Turnitin, GPTZero, Originality.ai, Copyleaks, ZeroGPT and Winston AI, with an academic mode for university-grade detection. Output is plagiarism-free, SEO-safe and indexed by Google normally, and you get several variants to pick from.

The site also includes a built-in AI detector, an AI writer, an AI watermark remover, and 40+ free writing tools: grammar checker, summarizer, tone converters, essay outline and thesis generators, and an APA/MLA/Chicago citation generator. Developers can call the same engine through the Humanizer REST API.

Free to try with no signup; the free plan is 500 words a month with no card. Paid plans start at $9.99/mo. 110,000+ users.

RewriteAI alternatives