Chrome extension

Better prompts, without sending a word anywhere.

PromptPolish fixes grammar, turns Hindi, Gujarati or Hinglish into simple English, and polishes your prompt as you type in ChatGPT, Claude, Gemini and more. It runs on your device. No account. No tracking.

Add to Chrome, it's free See how it works

Needs Chrome 138 or newer on desktop. Grammar checking works everywhere; on-device rewriting needs a supported device.

A prompt box with red and blue underlines under mistakes and a small card suggesting the fix "receive", with Accept, Ignore once and Add to dictionary buttons.

Everything you need to write a clear prompt

Right in the prompt box, one key press away.

Live suggestions

Grammar, spelling and clarity underlines as you type, with one-click fixes and an explanation for each.

One-key grammar fix

Press Alt+G and the whole prompt is corrected in place. Undo is one click away.

Translate to simple English

Write in Hindi, Gujarati or any language, in its own script or in English letters. Press Alt+T and get clear, everyday English.

Professional rewrite

Choose Professional, Concise, Friendly or Technical, and review a side-by-side diff before anything changes.

Your code stays untouched

Code, URLs, file paths, numbers, quotes and {{placeholders}} are protected and checked after every rewrite.

Ready for work

No sign-in, and IT can lock the site list or switch off cloud features with standard Chrome policy.

How it works

Three steps, no setup.

Install
Add PromptPolish to Chrome. There is nothing to sign up for.
Type your prompt
Open an AI chat and start typing. Mistakes are underlined; hover one to fix it.
Press a shortcut
Fix everything, translate, or polish the whole prompt, then replace it or undo.

See the changes before you accept them

The rewrite panel shows your original next to the new version, with every change highlighted. Replace it, copy it, or cancel. Ctrl+Z still works in the chat box.

The Polish panel with Rewrite, Fix grammar and Translate modes, showing the original prompt with deletions highlighted next to the rewritten prompt with insertions highlighted.

Fix the whole prompt in one key press

Press Alt+G and PromptPolish corrects grammar and spelling in place and tells you what it fixed. Changed your mind? Click Undo.

A prompt box after pressing Alt+G, with a small message above it reading "Fixed 4 mistakes." and an Undo button.

Keyboard shortcuts

Shortcut	What it does
`Alt`+`G`	Fix grammar and spelling. Runs locally in your browser.
`Alt`+`T`	Translate to simple English (Hindi, Gujarati and more, even typed in English letters).
`Alt`+`U`	Polish with your default tone.
`Alt`+`Shift`+`P`	Open the rewrite panel with all modes and a diff.
`Alt`+`E`	Elite prompt: turn a rough idea into a detailed, specific prompt.

You can change the first four shortcuts at chrome://extensions/shortcuts.

Works where you already write

Active on these sites by default. Add or remove sites in Settings.

ChatGPT
Claude
Gemini
Copilot
Perplexity
DeepSeek
Grok

PromptPolish is an independent project and is not affiliated with, endorsed by or sponsored by any of these services.

Private by design

Your text stays in your browser by default. Grammar checking runs on your device, and rewriting uses Chrome's built-in on-device AI.
No account, no analytics, no telemetry, no ads. We do not receive your prompts, ever.
Cloud is opt-in. If you add your own OpenAI, Anthropic or Gemini key, text goes only to the provider you chose, only when you ask, with code, URLs and numbers masked first.
Password fields are never touched. PromptPolish only works in recognised prompt boxes on sites you allow.

Read the full Privacy Policy and Terms of Use.

Also for the Claude desktop app and other Windows apps

Chrome extensions cannot run inside desktop apps, so there is a small Windows companion (beta).

Same shortcuts, any app

Select text and press Alt+G to fix grammar offline, or Alt+T / Alt+U / Alt+E with a provider you choose.

Private by default

Grammar fixes never leave your PC. Other actions are off until you pick a provider and confirm. Keys are encrypted with Windows.

Download for Windows

Windows 10 or 11. The app is unsigned, so Windows SmartScreen may ask you to confirm.

Questions

Do I need an account?

No. Install it and it works. There is no sign-up and no login.

Does my prompt leave my computer?

Not by default. Grammar checking and on-device rewriting happen on your device. Only if you turn on cloud mode with your own API key does text go to the provider you picked, and only when you ask for it.

Which languages can I translate from?

Hindi, Gujarati, Marathi, Urdu and many others, written in their own script or typed in English letters (for example "mare ek app banavvi chhe"). Quality is best with a cloud model; the on-device model can be less exact with English-letter text, so always review the result. Undo restores your original.

Why does on-device rewriting say it is unavailable?

Chrome's built-in AI needs a supported desktop device and a one-time model download. Without it, grammar checking and suggestions still work, and you can optionally use cloud mode.

Will it change my code or links?

No. Code, URLs, file paths, numbers, quoted text and placeholders are protected, and a rewrite that alters them is rejected so your text stays as it was.

Can my company control it?

Yes. Administrators can disable cloud mode, lock the list of sites and set a shared dictionary with Chrome enterprise policy.

How much does it cost?

The extension is free. If you use cloud mode, your provider bills you directly for your own API usage.