AI writing assistant for Gmail — no extension needed

No — and it doesn't need to be. Rewrait is a native Mac and Windows app that works at the operating-system level, so it sits over any app where you can select text, including Gmail in Chrome, Safari, Firefox, or Edge. There is nothing to install from the Google Workspace Marketplace, no extension permissions to grant, and nothing connected to your Google account. When you select a draft in the compose window and press Cmd/Ctrl+Shift+P, Rewrait reads only the text you selected, rewrites it, and puts the result back in place. The same shortcut works identically everywhere else you write — Slack, your support desk, docs — so you are not maintaining a Gmail-only tool. On the Team plan, company-context integrations connect to Notion, Confluence, and Google Docs with read-only scopes; Rewrait never connects to Gmail itself.

Gmail's built-in drafting generates a new email from a prompt. Rewrait rewrites the email you already wrote — keeping your facts, names, and intent — in a style you chose: Formal Email for clients, Native & Casual for internal threads, or a custom style trained on your team's approved docs. Every rewrite also comes with variants — Warmer, Shorter, More direct — so tone is a choice you make in one click, not a regeneration lottery. And because Rewrait is a desktop layer rather than a Gmail feature, the same shortcut and the same styles follow you into Outlook, Slack, Zendesk, and everywhere else you write. If your habit is drafting three rough sentences and wishing they were a tight, on-voice reply — without re-prompting a chatbot in another tab — that is exactly the gap Rewrait fills.

Yes, with one practical note about how it works. Rewrait rewrites the text you select — it does not read the thread. So for a long thread, the move is to braindump your reply first: the decisions, facts, and asks, in any order. Select that draft, press Cmd/Ctrl+Shift+P, and run a style like Make it Concise. You get a reply that leads with the decision and lists the asks, instead of a chronological ramble that buries them. The Free plan rewrites selections up to 1,000 characters, which covers most replies; Pro and Team raise the limit to 10,000 characters — enough for the messiest end-of-quarter thread recap. Because Rewrait only ever sees the selection, it is also safe on confidential threads: nothing about the rest of the conversation leaves your screen.

It reads only what you select, at the moment you press the shortcut. Rewrait has no Gmail integration, no inbox access, and no background scanning — it acts on the current text selection, like a smarter clipboard. Selections are processed on demand and never used to train models. Rewrite history is off by default: unless you turn it on in settings, Rewrait keeps no copy of what you rewrote. The Team plan adds a contractual no-training guarantee for the whole workspace. The integrations that power team styles — Notion, Confluence, and Google Docs — use read-only scopes and encrypted tokens, and a workspace owner approves exactly which documents are used as context. If you handle sensitive email — legal questions, compensation, candidate conversations — this is the practical difference between Rewrait and pasting a draft into a public chatbot.