ToneShift — AI Writing Assistant

by saitoooo · Accessibility

Manifest V3 in_app

View in Chrome Web Store Data as of 15 Oct 2026

Rewrite and generate AI-powered replies in any tone — directly in Gmail, LinkedIn, and Twitter/X.

Users

0 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#324K

#256K among extensions

Version

1.0.0

updated 5 Jun 2026

Users

monthly, 4 months

Latest, 15 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 4 months

Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About ToneShift — AI Writing Assistant

✨ ToneShift — AI Writing Assistant Struggling to strike the right tone in your emails, tweets, or LinkedIn posts? ToneShift brings AI-powered writing assistance directly into your favorite platforms — no copy-pasting, no switching tabs. ── HOW IT WORKS ── 1. Start typing in Gmail, Twitter/X, or LinkedIn 2. The ToneShift button (✨) appears near your text field 3. Choose a tone: Professional, Casual, Friendly, Assertive, or Concise 4. Hit "Rewrite" — your text is instantly rewritten in the chosen tone 5. Like a suggestion? Click "Use this" to apply it ── FEATURES ── 🎯 Tone Rewriting Rewrite any text in 5 built-in tones: • Professional — polished and business-ready • Casual — relaxed and conversational • Friendly — warm and approachable • Assertive — confident and direct • Concise — short and to the point 💬 Reply Generator (Pro) Replying to an email or tweet? Generate 3 ready-to-send reply options based on the message you're responding to. 🌍 Multilingual Support ToneShift detects the language of your input and responds in the same language. Write in Japanese, Spanish, French, or any language — and get rewrites in that same language. 🔒 Privacy First Your Anthropic API key is stored locally on your device only. ToneShift never sees your text — it goes directly from your browser to Anthropic's API. ── SUPPORTED SITES ── • Gmail (mail.google.com) • Twitter / X (twitter.com, x.com) • LinkedIn (linkedin.com) ── FREE vs PRO ── Free: • Tone rewriting — 10 rewrites/day • 5 built-in tones • Works on all 3 supported sites Pro ($7/month): • Unlimited rewrites • Reply generation (3 options per click) • Up to 5 custom tones • Priority support ── SETUP ── 1. Install ToneShift 2. Get a free API key at console.anthropic.com 3. Open ToneShift Settings and enter your API key 4. Start writing on Gmail, Twitter/X, or LinkedIn ── YOUR API KEY ── ToneShift uses your own Anthropic API key, giving you full control over usage and costs. Claude Haiku (the model used) is extremely affordable — typical usage costs less than $1/month. Questions? Contact us at m.masaki.sm@gmail.com