Undo-Ai - Make Ai work seem Human made Free

About

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
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- 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
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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
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- 1 rewrite per day
- Up to 1,500 characters per rewrite
- Casual and Professional tones

PREMIUM
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- 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
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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
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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
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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
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- 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