Tadashii Kotoba – Write Natural Japanese & Keigo

Select text on any page → natural Japanese or keigo, in place. Start from Japanese, English or Chinese. Proofread & furigana too.

Write natural Japanese and keigo — right where you type. Tadashii Kotoba (正しい言葉) works on any website. Select text and a small toolbar appears: turn casual Japanese into polite keigo, make it clean standard Japanese, or proofread it, then replace the original in place. Writing in English or Chinese? Select that too — it comes back as natural Japanese, so you don't need a separate translator. HOW IT WORKS 1. Select text on any page — Japanese, English or Chinese. 2. Choose Keigo, Standard or Fix from the toolbar that appears (or right-click → Tadashii Kotoba). 3. Replace the original in a text box with one click, or copy the result. No tab switching. WHAT YOU CAN DO • Keigo — casual Japanese becomes polite business Japanese (敬語) • Standard — clear, natural everyday Japanese • Fix — proofreads grammar, particles and conjugation; open "Show original" to compare • From English or Chinese — select it and press Keigo or Standard to get natural Japanese • Kana — furigana readings above every kanji in the result • Say — hear the Japanese read aloud with a high-quality voice; the sentence being read is highlighted • Gmail — a Proofread button appears next to Send when your draft is in Japanese • Right-click menu — every action also works from the context menu, including in PDFs. Prefer no pop-ups? Turn off "Show toolbar when selecting text" in Settings. • Interface in English, Japanese and Traditional Chinese FREE TO START Try it without an account. Sign in for free at tadashii-kotoba.com for a larger daily allowance; Pro gives the largest monthly allowance. The allowance is shared with the website. WHO IT'S FOR • People who write to Japanese clients, colleagues or landlords and want to sound polite and natural • Japanese learners who want readings and pronunciation while they write • Anyone who would rather draft in English or Chinese and send natural Japanese PRIVACY Text is sent to our server only when you run an action (rewrite, proofread, furigana or read aloud), and only to provide that feature. We do not sell your writing. Privacy policy: https://tadashii-kotoba.com/privacy Website: https://tadashii-kotoba.com Support: admin@isshin.tech