Undo-Ai - Make Ai work seem Human made Free

Rewrite pasted text in a natural human voice. On-device AI, privacy-first, 1 free rewrite daily — unlimited with premium.

Undo-Ai rewrites stiff, robotic text into writing that flows naturally — the way a real person would actually say it. Paste a paragraph, choose your voice, and get back a version with genuine rhythm, contractions, and the relaxed cadence that makes writing feel human. WHAT IT DOES ━━━━━━━━━━━━ - Rewrites pasted text in Casual, Professional, Academic, or Creative tone - Optional light imperfections (realistic contractions, natural phrasing) so output doesn't feel template-clean - Works on blog drafts, emails, social posts, product copy, cover letters, scripts — anything you wrote or are refining - On-device processing via Chrome's built-in Gemini Nano AI — your text never leaves your machine - Rule-based fallback engine runs instantly even when Gemini Nano is unavailable or not yet downloaded - Works fully offline once the model is downloaded PRIVACY FIRST ━━━━━━━━━━━━ All text processing happens on your device. No servers receive your input. No analytics. No tracking. The only external connection is to ExtensionPay (extensionpay.com) to check your subscription status — and even that never sees the text you rewrite. Full privacy policy at https://darkmessiah0071.github.io/undo-ai/privacy.html FREE TIER ━━━━━━━━ - 1 rewrite per day - Up to 1,500 characters per rewrite - Casual and Professional tones PREMIUM ━━━━━━ - Unlimited rewrites - Up to 25,000 characters per rewrite - All four tones: Casual, Professional, Academic, Creative - Imperfection controls: Low, Medium, High - Monthly ($6.99), Yearly ($69.69), or Lifetime ($420) — all plans include the same features FREE MONTH FOR AN HONEST REVIEW ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Leave a genuine 5-star review and claim 30 days of premium access directly inside the extension. No code required — just an honor-system reward for your support. HOW TO USE ━━━━━━━━━━ 1. Click the Undo-Ai icon in your toolbar 2. Paste the text you want to rewrite (20 characters minimum) 3. Choose a tone and imperfection level 4. Click Rewrite 5. Copy the result RESPONSIBLE USE ━━━━━━━━━━━━━━ Undo-Ai is a writing assistant for your own work. It is not designed to help misrepresent AI-generated content as human-authored in contexts where disclosure is required — academic submissions, regulated journalism, contracts, or certifications. You are responsible for how the output is used. TECHNICAL ━━━━━━━━ - Manifest V3 | Chrome 128+ required - On-device AI via Chrome Prompt API (Gemini Nano) - No broad host permissions — only extensionpay.com for payment verification - Storage and Alarms permissions only