Coda One
Free AI detector, plus humanizer, rewriter, grammar checker
WritingFreemium#ai-detector#ai-writing#grammar-checker
Launches Nov 7, 2026 at 00:00 UTC
What is Coda One?
Coda One is a small set of AI writing tools built around one loop: check a draft, then fix what the check finds. The AI Detector is free with no daily limit and no signup, and it marks the specific sentences that read as machine-written instead of just giving a score.
Alongside the detector are an AI Humanizer with 5 free writing modes (Standard, Academic, Blog, Formal, Simple), an AI Rewriter with 5 free tones (Standard, Fluency, Formal, Casual, Concise), and a Grammar Checker. All four are available in the browser and in a Chrome extension. The writing tools are free for 3 runs a day without an account, or 5 with a free account. Built by a small independent team in London.
Coda One features
- Free AI Detector with no daily limit and no signup
- Sentence-level highlights of text that reads as machine-written
- AI Humanizer with 5 free writing modes
- AI Rewriter with 5 free tones
- Grammar Checker
- Chrome extension for all four tools
Who uses Coda One and for what
- Students and writers checking a draft before submitting it
- Marketers and bloggers polishing AI-assisted copy
- Editors reviewing text for m
Coda One FAQ
Is Coda One free?
The AI Detector is free with no daily limit and no signup. The humanizer, rewriter and grammar checker are free for 3 runs a day without an account, or 5 with a free account.
Do I need an account to use the AI detector?
No. The AI Detector works in your browser without signup.
Is there a Chrome extension?
Yes. The detector, humanizer, rewriter and grammar checker are available in a Chrome extension.
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