AI extension for Chrome

The extension is built around three things you do in a browser all day: ask questions, rewrite your own writing, and read in other languages.

• Chat in the sidebar. It can use the page you have open, so you can ask for a summary or a specific answer without copying text across. It also works with YouTube videos, with web search that cites its sources, and with PDF, Word, Excel and CSV files. See chat with PDF and YouTube summaries.
• Rewrite anywhere. Select text and a toolbar appears with direct actions and a Ctrl+K command menu. Pick a tone and length, review a word-by-word comparison, then replace the selection or insert into the field. How rewrite anywhere works.
• Translate the page. Right-click and choose "Translate this page" for a bilingual view with a progress bar. Page translation.

Copilotly is an independent AI assistant and is not affiliated with Microsoft Copilot. If you searched for "copilot for Chrome" looking for Microsoft's, this is a different product.

"ChatGPT for Chrome" usually means one thing: a way to use GPT models without leaving the tab. Copilotly includes OpenAI's GPT models and also Claude, Gemini, Grok, DeepSeek, Mistral and more in the same picker, so you can switch when one answers a question badly. Which models you can use each day depends on your plan; the ChatGPT page and the Claude page list the specifics.

If you already pay for an API key, bring your own key. Requests on your own key are never metered by Copilotly.

Free gives you fast models within a token allowance, plus per day: 10 premium-model messages, 5 web searches, 3 images, 1 deep research run, 3 full-page translations and 5 voice drafts. The details are on the free plan page.

Pro is $6.99/week, $19.99/month or $149.99/year, with a 7-day free trial for first-time subscribers. Pro lifts the premium-model limit and raises the daily caps. See pricing.

Dictation uses the browser's speech recognition. Chrome has supported it since version 33, per MDN's compatibility data, so it works here. MDN also notes that in Chrome the audio is sent to a web service for recognition, so it will not work offline. Details on the dictation page.

1. Ask about the tab you are on. Open a long article, press Alt+C and ask for the three claims that matter and where the author backs them up. Then ask what is missing.
2. Rewrite one email. Select a paragraph in Gmail, pick a tone and a length, and read the word-by-word comparison. Use undo or the version list if you prefer an earlier draft.
3. Translate a page you cannot read. The bilingual view keeps the original beside the translation, which makes it easier to spot a bad rendering.
4. Upload a spreadsheet. Drop in an Excel or CSV file and ask a question about it, or ask for a new spreadsheet, document or slide deck as a downloadable file you can preview in the extension.

Two settings change how well answers fit you. Custom instructions and memory let you tell the assistant who you are and how you like answers, so you stop repeating yourself (see memory and personalization). My Voice learns your writing style, so rewrites sound like you rather than like a generic assistant.

Chats can be incognito, shared as a link, or exported as Markdown; PDF export is on Pro.

Start with the basics. Check that the extension is enabled at chrome://extensions, then reload the tab, because extensions added while a page is open do not always attach to it. Pages such as the Chrome Web Store and Chrome's own settings pages are restricted by Chrome, and extensions generally cannot run on them, so test on an ordinary website. If Alt+C does nothing, another extension may be using the same shortcut; you can review shortcut assignments in Chrome's extension settings.

Still stuck? Sign out and back in, and make sure you are on the latest version of Chrome. If you would rather use the same account without installing anything, the web app at app.copilotly.com has the chat features.

Pin it and learn the shortcut

Pinning keeps the icon visible; Alt+C works whether or not it is pinned. If you want a different key, Chrome lets you review and change extension shortcuts in its extension settings.

Choose what the extension can see

Chrome lets you control when an extension may read a site: only when you click it, on the current site, or on all sites. Rewrite on selected text and the sidebar need to run on the page you are using, so the current-site or all-sites setting suits them best. Tighten it if you want Copilotly to act only on demand.

Decide whether it should run in Incognito

By default it does not. Allow it per extension in Manage extensions if you want it there, and use Copilotly's own incognito chats if you want a chat that is not kept in your history.

Sign in, then pick a model

A free account is enough to start. If you want to compare answers, run the same prompt in GPT and in Claude; our three-way comparison for professional work explains where each tends to be stronger.

Copilotly runs as a desktop extension in Chrome, Edge, Firefox, Brave and Opera. Arc and Vivaldi also install the Chrome Web Store build. Safari is the exception: no Safari build is published, so the Safari page covers what to use instead.

How was the dictation column checked?

Dictation uses the browser's built-in speech recognition, so it follows the browser, not Copilotly. We took the support data from MDN's SpeechRecognition page. MDN also notes that in browsers such as Chrome the audio goes to a web service for recognition, so it will not work offline. Brave is marked "not verified" because we have not tested it. Rewrite, translation and chat do not depend on speech recognition.

What about phones and tablets?

Desktop extensions do not run in mobile browsers in general. On a phone, use the iOS or Android app, which works on the free plan. Everything is listed on the download page.

Limits belong to your account, so they are the same in the extension, the web app and the mobile apps. Free covers fast models within a token allowance, plus these daily allowances:

What does Pro cost?

Pro is $6.99/week, $19.99/month or $149.99/year, with a 7-day free trial for first-time subscribers. Compare plans on the pricing page.

Do my own API keys count against these limits?

No. Requests on your own key are never metered by Copilotly; see bring your own key.

The same account works everywhere, but the surfaces are not identical.

Rows marked No for the web app and mobile reflect that those features act on the browser page you are viewing. If you rely on them, the extension in Chrome, Edge or Firefox is what you need. For the rest, see all features.

Which shortcuts and menus matter?

• Alt+C opens the sidebar widget.
• Select text to show the rewrite toolbar; Cmd/Ctrl+K opens its command menu.
• Right-click selected text for the context menu, or right-click a page and choose Translate this page.
• Undo and versions restore earlier wording after a rewrite.

How do I turn it off or remove it?

Right-click the Copilotly icon and choose Remove from Chrome, or open Manage extensions and select Remove (Chrome Help). To pause it instead, use the toggle in Manage extensions.

Where does my text go?

Content you ask about, including selected text, is sent to the AI model you choose, so avoid using it on anything you would not paste into an online service. Incognito chats are available in the product.

Ask the same prompt twice

Run a question in one model, switch the picker and run it again. A GPT answer and a Claude answer often differ in wording and sometimes in substance, so a second opinion is cheaper than finding the mistake later. Neither is right every time.

Match the model to the job

Use a fast model for quick lookups and small edits, and a premium model when a question needs careful reasoning. Free accounts get 10 premium-model messages a day, so spend them on the questions that matter. Our professional-work comparison is a good starting point.

Check what matters

For anything you will send, publish or act on, read the result and verify the facts and numbers against the original source. Turn on web search when you need cited sources, then open the citations.

Be specific about tone and length

The rewrite toolbar has tone and length pickers. "Friendlier, shorter" is a clearer instruction than a bare rewrite, and you can run it again with a different setting. See rewrite anywhere.

Read the word-level diff

The comparison shows exactly what changed against your original. Approve the parts you like, use undo for the rest, and check that names, dates and numbers are untouched.

Teach it your style

My Voice learns your writing style, and custom instructions and memory tell the assistant who you are and how you like answers. Both are covered in memory and personalization. For a one-off reword with no setup, the free paraphrasing tool works without an account.

Ask specific questions

"What does the author claim, and where is the evidence?" works better than "summarize". Ask for quotes or section names so you can check them against the page.

Work in steps on long pages

Ask for an outline first, then dig into one section. For documents, upload the PDF, Word, Excel or CSV file instead and use chat with PDF. On video pages, ask for a summary and follow up on the part you care about; see YouTube summaries.

Know what leaves the page

Only ask about pages you are comfortable sending to an AI model. Pages behind a login, such as banking or health portals, are better left alone.

Check your organisation's rules first

Many employers restrict browser extensions or AI tools. Ask your IT or security team before installing it on a work profile. This is general guidance, not legal or compliance advice.

Keep sensitive content out

Selected text and pages you ask about go to the model you choose. Do not use it on confidential client data, credentials or personal records unless your policy allows it. Incognito chats and your own API key give you more control, but they do not change what is sent for a request.

Personal profile, personal use

A separate browser profile for personal use keeps work and personal accounts apart. See pricing for plan details.