About Humanize Gen
The free AI humanizer that makes AI-generated text sound human. Built by 345tool • July 12, 2026
What Is Humanize Gen?
Humanize Gen is a free AI humanizer that rewrites AI-generated text into natural, human-like writing. Paste content from ChatGPT, Claude, Gemini, or any large language model, pick one of 6 writing styles, and get back text indistinguishable from human-written prose.
The tool runs on the DeepSeek API with carefully engineered system prompts per style — eliminating repetitive patterns, varying sentence rhythm, and restoring the organic imperfections that make writing feel human. Up to 1,200 words free per request. No sign-up needed to start.
Release Log
v1.1.0 — Styles, Diff & Credits
July 12, 2026
- Expanded to 6 writing styles: General, Blog, Academic, Formal, Engaging, Friendly
- Word-level diff highlighting (Google diff-match-patch) with synchronized scroll
- Credit system: free up to 1,200 words, 50 credits for longer requests
- Google OAuth 2.0 sign-in with daily check-in rewards (50 credits/day)
- Local history panel (50 entries, stored in your browser)
- One-click clear and copy; style tabs replacing dropdown
v1.0.0 — Initial Launch
July 10, 2026
- Core AI text humanization engine via DeepSeek API (deepseek-v4-flash)
- 3 initial writing styles: General, Academic, Formal
- Input up to 3,000 words per request, minimum 30 words
- Real-time word counter with input validation
- One-click copy for humanized output
- Dual light/dark mode with animated grid background
- API rate limiting (20/min) and request body size validation
- PHP 8.3 backend, vanilla JS frontend, zero frameworks
- JSON-LD structured data across all pages
- Privacy-first architecture: no server-side text storage
How It Works
Paste your AI-generated text, pick a style, and click Humanize. The backend sends your text to DeepSeek with a style-specific system prompt — the model restructures sentence flow, replaces predictable transitions, and restores natural tonal variation. The rewritten text returns to your browser with green highlights marking every change.
Frontend: vanilla JavaScript with diff-match-patch for word-level comparison. Backend: PHP 8.3 + cURL. Optional Google sign-in unlocks credits for texts over 1,200 words. All processing is stateless — no text is stored on the server. Your history lives in your browser's localStorage, and you control it completely.
Privacy & Data Handling
Your text transits from your browser to our server to DeepSeek and back. Nothing is written to disk or database. Your humanization history stays in localStorage — we never access it. GA4 collects only anonymized page-view counts. No third-party trackers touch your content. Full details in our Privacy Policy.
Contact
— E-mail: [email protected]
— Date of creation: July 10, 2026 | Last updated: July 12, 2026
We are the 345tool Team
345tool is an independent developer collective engineering elite, pure client-side, and privacy-first web utilities to replace bloated internet tools.