Local-first text editor

OnecaratEditor

A local-first text editor for writing, chatting, and speech-to-text on your own PC.

For people who need AI for writing, but cannot send their work to online services.
Now with official Whisper support for local speech-to-text.

Text editor Local AI GGUF models No cloud by default
Portable ZIP for Windows. Downloaded from GitHub Releases.
LFM2.5-1.2B-JP model is included. Whisper-related files must be prepared separately by the user.
OnecaratEditor screenshot
v0.9.3 Current version
ZIP No installer required
GGUF Model included

Download

Latest portable build is distributed through GitHub Releases.

Current release
Version
0.9.3
Platform
Windows
Package
Portable ZIP
Source
GitHub Releases
Updated
2026-05-21
Built by
Onecarat Labs
Code signing
OV certificate
LFM2.5-1.2B-JP model is included — ready to use out of the box.
Whisper-related files are not bundled and must be prepared separately by the user.
OV code signing has been introduced to reduce Windows SmartScreen warnings.

What's new in v0.9.3

  • Writing Mode — project management, sticky notes, background presets, snapshot saving
  • Genkou-yoshi (manuscript paper) — vertical text display with typesetting rules
  • Chat output rendered as HTML (Markdown / Mermaid / code highlighting)
  • llama-server b9193 support, GPU detection fix, max_tokens 2048
  • 3 new help topics, keyboard shortcut updates
  • Security hardening (XSS protection, command injection prevention, path validation)
  • i18n improvements (status bar Japanese localization, editor placeholder support)

Quick Start

The editor works right after extraction. LFM2.5-1.2B-JP model is included.

For speech-to-text, prepare Whisper-related files separately.
You can also use your own GGUF models.

  1. Download the ZIP from GitHub Releases.
  2. Extract all files.
  3. Run OnecaratEditor.exe.
  4. LFM2.5-1.2B-JP model is included. You can also use your own GGUF models.
  5. Prepare Whisper-related files separately if you want speech-to-text.
  6. Select a model and start the local server.

Start in 3 steps

1

Download

Get the latest portable build from GitHub Releases.

2

Add your local files

LFM2.5-1.2B-JP model is included — ready to use.
You can also add your own GGUF models. Whisper files must be prepared separately.

3

Start and write

Launch OnecaratEditor and work locally on your own PC.

Need more detail? See the Quick Start guide.

Editor + Chat + Speech

Write, chat, and use local speech-to-text side by side on your own PC.

Editor and AI chat side by side

Editor + Chat

Write and chat with AI side by side. Everything runs locally on your PC.

Focused writing environment

Writing space

A focused editor for everyday writing. AI is there when you need it.

GGUF model selection and local server

Model included & switchable

LFM2.5-1.2B-JP is included. You can also switch to your own GGUF models.

Who it's for

For people who need AI for writing, but cannot send their text to online services.

Sensitive documents For drafts, notes, and work text that should stay on your own machine
Cloud-restricted work For situations where online AI services are difficult to use
Local-first writing For people who want writing help and AI support in a local workflow
Private AI workflow For users who want AI assistance without default cloud dependency
Ready out of the box LFM2.5-1.2B-JP model is included. You can also use your own GGUF models

Common questions

Answers to what most people ask before downloading.

Are models included?

Yes. LFM2.5-1.2B-JP is included and ready to use. You can also use your own GGUF models.

Is Whisper included?

No. Whisper-related files are not bundled and must be prepared separately by the user.

Does it require installation?

No installer is required. The current release is provided as a portable ZIP for Windows.

Does OnecaratEditor send my data to the cloud?

No. OnecaratEditor is designed for local-first use. Your text and AI workflow stay on your own PC unless you choose otherwise.

Is Markdown Preview stable?

Markdown Preview is currently included as an experimental feature and may change in future updates.

What is Writing Mode?

Writing Mode is a dedicated mode for long-form writing, with project management, sticky notes, background presets, and snapshot saving.