Keigo & Business Japanese Corrector - Japanese Grammar Checker AI - Fude

Reporting to your manager, emailing a client, posting in the team Slack — Fude fixes your keigo mistakes before you hit send.
Fude (筆) is a keigo (Japanese honorifics) and business Japanese checker for non-native speakers who work in Japanese. It runs right where you already write: Gmail, Slack, Notion, Google Docs and more.
「拝見させていただきました」「弊社がご説明なさいます」「了解しました」— mistakes that are hard to notice yourself get underlined as you type, with the reason and the correct phrasing explained in your language.

★ WHAT FUDE DOES ★

✓ Checks for the right reader
• Switch the audience between Internal (coworkers) and External (clients) and the same sentence is judged differently
• 「拝見させていただきました」 in the team Slack is flagged as over-polite; 「送ります」 to a client is flagged as not polite enough
• 3 keigo levels: Casual / Business / Ultra-formal

✓ Fixes keigo mistakes on the spot
• Double keigo (拝見させていただく, おっしゃられる)
• Mixing up respectful and humble forms (弊社がご説明なさいます)
• Set phrases that are wrong at work (了解しました, ご苦労様です)
• Particles, Japanese grammar and typos are checked at the same time

✓ Write plainly, convert to keigo (Pro)
• Type 「明日の会議、資料を送って」, select it, right-click → a business sentence that fits your audience and keigo level

✓ Works where you already write
• Gmail, Slack, Notion, Google Docs and other web editors
• Text fields on any page are detected automatically

✓ Explanations in your language
• English, 日本語, 中文, 한국어, Español, Português

★ WHO IS FUDE FOR? ★

• Non-native employees at Japanese companies
• Anyone unsure whether the keigo in their email to a client is right
• Anyone worried about sounding rude to a manager or senior coworker on Slack
• Anyone who wants Japanese grammar proofreading along with their keigo

★ FREE vs PRO ★

FREE: 20 AI corrections/day
PRO ($9.99/mo): 300 AI corrections/day, keigo conversion of selected text (right-click), tone & email-structure check, custom dictionary

★ PRIVACY ★

Your text is processed securely and never stored permanently.

★ SUPPORT ★

Questions? Contact us at [email protected]