AI Text Humanizer
Transform AI-generated content into natural, human-sounding writing — free, no account required, and nothing leaves your device. Choose from three writing styles and get results in seconds.
Writing style
How It Works
Paste your text
Drop in any AI-generated content — up to 2,000 characters. Nothing is sent anywhere.
Pick a style
Select Natural, Conversational, or Formal depending on your audience.
Model rewrites in-browser
SmolLM2 360M runs inside a Web Worker using WebGPU (WebAssembly fallback). Your text stays entirely on your device.
Copy or download
Copy the result to your clipboard or download it as a .txt file — all in the browser.
Usage Guide
Writing Styles
| Style | Description | Best For |
|---|---|---|
| Natural | Clear and easy to read | Blog posts, general content |
| Conversational | Friendly and approachable | Social media, emails, chat |
| Formal | Professional and polished | Reports, cover letters, proposals |
Key Features
- ✓ Runs 100% in your browser — no data ever leaves your device
- ✓ Free with no sign-up, no usage limits, and no watermarks
- ✓ Model (~388 MB) is downloaded once and cached locally for offline use
- ✓ Automatic chunking handles longer texts transparently
- ✓ Copy to clipboard or download the result as a plain-text file
- ✓ Supports all modern browsers (Chrome, Firefox, Brave, Edge)
FAQ
Is my text uploaded to your servers?
No. Your text never leaves your device. The entire humanization process runs inside your browser using Transformers.js and SmolLM2 360M Instruct. Nothing is sent to or stored on any server.
Why is the first use slow?
The first time you use the tool, your browser downloads the SmolLM2 360M model (~388 MB) and saves it to your browser's local storage (IndexedDB). After that one-time download the model loads instantly, and the tool works even offline.
Which AI model is used?
The tool uses SmolLM2 360M Instruct by HuggingFace — a compact instruction-tuned decoder model that uses ChatML formatting with few-shot examples to reliably rewrite AI-generated text. It is served as an ONNX model via Transformers.js and runs entirely on your device using WebGPU (with a WebAssembly fallback for unsupported browsers). The model is open source under the Apache 2.0 license.
What is the maximum text length?
The tool accepts up to 2,000 characters. For longer inputs the humanizer automatically splits the text into chunks of ~100 words (to stay within SmolLM2's reliable instruction-following range), processes each one separately, then joins the results into a single output.