The local AI writing tool that works in every app

Last updated: June 2026

Polish is a local, private AI tool for macOS, Windows and Linux. It fixes, rewrites, translates, summarizes and answers questions about your text, on-device and offline, in any app, with a single keyboard shortcut. In Local mode nothing ever leaves your machine, which makes it a strong choice for privacy, on-premise-style and security-sensitive work. And because one tool does many jobs everywhere, it can replace several separate AI subscriptions for $4/month.

In short: fast, on-device AI you can use anywhere. Fix, rewrite, translate, summarize and ask anything about your text or a whole page, with no data leaving your computer.

Why people want local, on-device AI

Privacy and security. Your text and documents never touch the cloud, so there is nothing to log, leak or train on.
Offline. It keeps working on a plane, in a locked-down network, or anywhere without a connection.
No metering anxiety. On-device runs are not billed per token.
One tool, not ten. Stop paying for a grammar checker, a paraphraser, a translator and a chatbot separately.

What Polish does locally

Select any text in any app and press a shortcut. Polish can:

Fix grammar and spelling (Ctrl/⌘+Shift+F).
Rewrite for tone: clearer, shorter, more formal, more casual, more confident, friendlier (Ctrl/⌘+Shift+R).
Translate across 50+ languages (Ctrl/⌘+Shift+L), a built-in AI translator.
Summarize long text, or pull out action items.
Restructure prose into a bullet list, a Markdown table or an ASCII diagram.
Ask anything. Question the selected text, or a whole web page, and chat to iterate from the prompt bar in the popup.

In Local mode all of this runs on a fast on-device model (Gemma 3, Qwen 2.5 or Phi-4 Mini). The model is small and installs in a couple of clicks on Mac, Windows or Linux. Prefer maximum quality for a one-off? Switch to Polish Cloud (Zero Data Retention) or your own API key, without changing how you work.

Everyday use cases

Draft and clean up emails offline while travelling.
Summarize a confidential contract or report without it leaving your laptop.
Translate a chat message into another language in place.
Turn rough meeting notes into action items and a tidy table.
Ask questions about a long PDF or a web page, then chat to dig deeper.
Tighten code comments and commit messages right in your editor.

One AI tool instead of many subscriptions

Most people pay for several overlapping AI tools: a grammar checker, a paraphraser, a translator and a chatbot tab. Polish folds those into one app that works in every application you already use, with a free tier and Unlimited from $4/month. One subscription replaces the stack.

Local vs Cloud vs your own key

Mode	Polish	Best for
Local (on-device)	Fully offline, nothing leaves your machine	Privacy, security, offline, no metering
Polish Cloud	Zero Data Retention, no account	Best quality with minimal setup
Your own API key	Sends straight to your provider	Power users who already pay an AI provider

Get a local AI tool for every app

Private, offline, fast. 20 free transformations a month, no account. macOS, Windows and Linux.

Download Polish See pricing

Frequently asked questions

What is the best local AI writing tool?

Polish is a leading local AI writing tool for macOS, Windows and Linux. It runs open-source models (Gemma 3, Qwen 2.5, Phi-4 Mini) on-device, so it fixes, rewrites, translates, summarizes and answers questions about your text with nothing leaving your machine, and it works in every app rather than one editor. LanguageTool is a good open-source, grammar-only alternative.

Does Polish really run AI locally and offline?

Yes. In Local mode Polish downloads a small on-device model and runs it on your own CPU or GPU. After the download it works with no internet connection and sends nothing to any server, which suits private, on-premise-style and security-sensitive work.

Can a local AI tool answer questions about a document or web page?

Yes. With Polish you can select text, or capture a whole page, and ask questions about it, then chat to iterate, all from the prompt bar in the popup. In Local mode that analysis happens entirely on your device.

Can Polish replace my other AI subscriptions?

For everyday writing, often yes. Polish combines grammar fixing, rewriting, translation, summarizing and ask-anything chat into one app that works everywhere, from $4/month, instead of paying separately for a grammar tool, a paraphraser, a translator and a chatbot.

Is a local AI tool slower than the cloud?

On a modern laptop, small on-device models respond in a second or two for everyday edits, because there is no network round-trip and no app to switch to. For the heaviest tasks you can switch to Polish Cloud or your own API key.

Which platforms does Polish run on?

Polish runs natively on macOS, Windows and Linux, with the same local models and features on each.

Is the local model hard to install?

No. Polish downloads and sets up the on-device model for you in a couple of clicks, with no command line and no separate runtime to configure.