- Turn notes and outlines into drafted chapters
- Chat to explore ideas and map the plot
- Generates in your personal writing style
For when the draft is not finished yet
If proofreading and editing assume a finished book, the Cowriter is the opposite: it helps you get the words down in the first place. Bring fragments and it helps you shape them into chapters.
Opt-in and labelled
Nothing here happens by accident. Cowriter is separate from the editing tools, clearly marked, and only runs when you choose it, so AI never touches your manuscript unless you ask it to.
Frequently asked
Can you help me finish my book?
Yes. Chapterra is primarily for editing, but it includes drafting help. Upload whatever you have (notes, outlines, rough chapters), chat to explore ideas and map out your story, then generate chapters from your notes in your personal writing style.
Do you rewrite my book?
No. You stay in control. Proofread uses rules-based corrections. Copyedit and Line Edit suggest improvements you can accept or reject, with Light and Heavy line-edit options so you can find your balance. Dev Critique and Beta Read give feedback without changing your text. Cowriter is opt-in and clearly labelled.
Start drafting with Cowriter
Chapterra works on your whole book, one chapter at a time. Try it free.
Start drafting with Cowriter