WritePair: AI Writing Assistant for Every Text Field

Rewrite, expand, shorten & retone any text field — instantly, 100% on-device with Chrome's built-in AI.

WritePair is your AI writing partner for every word you write — right inside the text field you're already in. Select any text on any site and a small toolbar appears with one-click Rewrite, Expand, Shorten, and Tone. No copying into another tab. No sidebar to babysit. No context switching. And it runs entirely on your device. WritePair uses Chrome's built-in, on-device AI (Gemini Nano), so there are no API keys to paste, no account to create, and nothing you write ever leaves your browser. ──────────────────── WHAT YOU CAN DO • Rewrite — rephrase a sentence or a paragraph into something clearer and sharper. • Expand — turn a quick note into a full, well-formed paragraph. • Shorten — cut the fluff while keeping your meaning. • Tone — switch between Professional, Casual, Friendly, Persuasive, and Formal in one tap. • Email replies — on Gmail and other webmail, generate a one-click reply that actually understands the thread. • Preview, then decide — every suggestion appears inline so you can Replace, Regenerate, or Dismiss. Your text only changes when you say so. ──────────────────── WORKS WHERE YOU WRITE Gmail, LinkedIn, X, Notion, Slack, support desks, CMS editors, web forms, comment boxes — if it's a text field, WritePair is there. It handles plain inputs, rich contenteditable editors, and fields tucked inside iframes and shadow DOM, and it inserts text through each site's own editing pipeline so native undo keeps working. ──────────────────── PRIVATE BY DESIGN • On-device AI — generation runs locally through Chrome's built-in models. • Nothing leaves your browser — no servers, no network calls for AI, no API keys. • No account — install and start writing. • Privacy Mode — flip it on for sensitive pages and WritePair won't read page content, save history, or learn from what you type there. • Opt-in analytics only — usage counters are off by default, stored locally, and never include what you wrote. You can review and clear everything from Settings. ──────────────────── MADE TO STAY OUT OF THE WAY • The toolbar appears on selection and never steals focus, so your cursor and selection survive every click. • Style-isolated UI that won't clash with the page. • Keyboard shortcuts for Rewrite, Expand, Shorten, and Tone. • History & favorites to reuse what worked. • Style learning that gently adapts suggestions to your own voice over time. ──────────────────── WHY WRITEPAIR Most AI writing tools either only fix grammar, or push you into a sidebar and a paid account, or send everything you type to their servers. WritePair is built the opposite way: generation-first, inline, and on-device. It's the co-writer that lives in your text field — not a chatbot in another tab. Write better. Write faster. Write together. ──────────────────── Note: WritePair's on-device AI relies on Chrome's built-in AI (Gemini Nano), available in recent Chrome versions on supported hardware. On first use, Chrome may download the on-device model once.