Fude is a Chrome extension that uses AI to detect Japanese grammar errors and automatically converts text to proper keigo (polite language). It helps with business emails and messages.

Yes, you get 10 AI corrections per day, 3 keigo levels, and basic grammar checking for free. For unlimited use, consider the Pro plan.

What keigo levels are available?

Three levels: Casual (tameguchi), Business keigo, and Ultra-formal keigo (imperial/diplomatic level). Choose based on your needs.

Which sites does it work on?

Gmail, Slack, Notion, and other major web services. It works on any site with text input fields.

Yes, your privacy is protected. Text is only used for AI processing and is never stored on servers.

Chrome Extension

Perfect Business Japanese In Seconds

AI checks grammar and converts to proper keigo.
Make writing Japanese emails effortless.

Add to Chrome - Free See How It Works

Fude - AI correcting Japanese keigo in real-time

Features

Smart support for Japanese business writing

AI Grammar Check

Automatically detects and fixes grammar errors

3 Keigo Levels

Casual, business, and ultra-formal keigo conversion

Real-time Correction

Get suggestions as you type

Custom Dictionary

Works Everywhere

Gmail, Slack, Notion, and more

Privacy First

No data stored on servers

Get Started in 3 Steps

No account required. Start using immediately

Install the Extension

One-click install from Chrome Web Store

Write Your Message

Compose emails and messages as usual

Auto-Correction

AI checks grammar and keigo, suggests corrections

Simple Pricing

Start free, upgrade when you need more

Free

For trying it out

$0 forever

10 AI corrections per day
3 keigo levels
Basic grammar check
Major site support

Get Started Free

Pro

For serious business use

$4.99 /month

Unlimited AI corrections
Claude Sonnet high-accuracy
Custom dictionary
Priority processing
Early access to new features

Start Pro

Try it Free Now

No account needed. Start using right after install.

Install Free