AI that never leaves your PC.
OnecaratEditor Core is a Windows text editor powered by a local LLM. Chat, folder RAG, voice input, and AI text processing — everything runs on your own PC. Nothing goes to the cloud, so you can finally use AI on confidential documents.
30-day full-featured trial · One-time purchase · No subscription
We are preparing our Microsoft Store submission. Availability will be announced here.
Every external request the app ever makes is written to network.log — an audit trail you can open anytime.
Verifiable by design
External access only during setup
A single model download during setup. After that, the app runs fully offline.
Every request is logged
The app only ever appends to network.log — a plain-text file you can open and check at any time.
Your data stays on disk
Documents, indexes, and settings are stored locally. We operate no servers.
Local AI, practical tools
Folder RAG
Point the app at a folder and it indexes your documents (txt / md). The AI answers based on your own material — with sources you can click to open the original file.
Voice input with organizer cards
Local transcription, then one click to shape it into a summary, meeting minutes, a to-do list, or an idea memo.
AI text processing
Seven tools on any selected text: summarize, proofread, rephrase, translate, extract, format, and generate questions.
The editor itself
Monaco-based editing with tabs, split preview, folder search, large-file grep, customizable shortcuts, automatic backups, and Shift_JIS / EUC-JP support.
Core and Free
| OnecaratEditor Core | OnecaratEditor (Free) | |
|---|---|---|
| Best for | Serious work on confidential documents | Trying local AI, everyday notes |
| Distribution | Microsoft Store (submission in progress) | GitHub Releases |
| Model | Gemma 4 E4B (downloaded during setup) | LFM2.5-1.2B-JP (bundled) |
| Folder RAG | Included | — |
| Voice input | Built in, with organizer cards | Whisper files must be prepared separately |
| Price | ¥3,950 one-time (30-day trial) | Free |