PenForge runs on the AI provider of your choice. You pay them directly — pennies per chapter — and PenForge never charges you for AI usage. Pick one to start. You can switch later.
Lite includes the full 6-stage writing engine, timeline, voice lock and canon gate. Pro unlocks Studio editing, the full manual-writer toolkit, character codex, @mentions, all templates and themes. PenForge is subscription-only — if your subscription lapses, PenForge locks to read + export of your existing novels until you resubscribe.
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⚠ Open PenForge through your browser, not as a file
You opened index.html directly. Templates and the AI engine can't load this way. Please open http://localhost:3001/ instead (start the server with node server.cjs first).
Quick start — pick a ready template
Use a pre-built novel template to start instantly. Skip the form below if you do this.
⚠ Templates are PenForge IP. The premises, character names, world rules, and arc structures in these starter templates are copyright PenForge. They're provided as learning scaffolds and brainstorming aids — use them to study structure or kick-start your own original work. You may not commercially publish, sell, or distribute chapters built on these template canons as-is. Once you've replaced the names, world, and premise with your own, the chapters you generate are yours.
Or build your own novel — fill the form below
not saved yet
No JSON needed. Fill what you know — click ⚡ next to any section and the AI fills it for you. Your draft auto-saves to your browser.
0% filled in · start with the required fields below
⚡ AI fill:
Fill title + genre + a one-line summary, then click any button. Re-click to get a different suggestion.
+ World / setting+ Tone / vibe+ Arc structure (optional — engine will auto-fill if blank)+ Narration style (POV)
My novels
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Character codex
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Pick a character from the list to view their full profile.
Edit novel
id: …
🎨 Voice & style — Pro
🔒 Voice sample and style dials are PenForge Pro features. See plans →
✨ Extract voice from more text — paste up to 4 chapters
Paste a longer sample (500 – 30,000 characters, roughly one scene up to four chapters) and the engine will distill it into a compact ~400-word voice fingerprint written IN your voice. The fingerprint gets written into your Voice sample above — review it before hitting Save changes.
Pick a novel from "My novels" to start writing
Hand-written, imported, and AI chapters share one story memory — mix them freely.
Generation settings:
Tip: turn on Creative mode for chapter 1 of a new novel (lets the engine flesh out canon). Turn it OFF later for tight consistency.
🗺 Story plan & coaching — give the AI a spine so the book pays off
📋 Blueprint the next chapter — see & edit the plan before a word is written
Forging chapter…
Warming the forge…
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3–12 min on free keys
Story timeline
arcs · click for detail
Hover an arc for details.
Finished a draft? Take your book out:
Import your chapters
Paste or upload chapters you already wrote — the AI reads them, learns your story and voice, then "Generate next chapter" continues from where you stopped.