Translate a Foreign Email or PDF on Your PC With ChatRTX

Download and install ChatRTX

Open your web browser and go to the official NVIDIA product page for ChatRTX. Look for a button labeled something like Download or Get Started. Click it, then sign in with your NVIDIA developer account (or create one — it only asks for an email and a password). After the installer file finishes downloading, double-click it and follow the on-screen prompts. The installer may ask you to confirm a folder and agree to the license terms.

You'll know it worked when a new icon named ChatRTX appears in your Start menu and you can launch it without an error message.

Install your first AI model

The first time ChatRTX opens, the main window shows an empty chat area and a sidebar (the narrow panel on the left or right) with a section labeled something like Models or AI Models. That section is empty — the app itself is just a window; the actual "brain" (the LLM) is a separate download. Click the button that says Download next to the model named Mistral or Llama (NVIDIA changes the default model name from time to time, so look for whichever one has a "Download" button beside it). A progress bar appears; let it finish — this is the biggest download, so it may take several minutes on a slow connection. If your hard drive seems too small, try the smaller "Mistral 7B" option first.

You'll know it worked when the model name in the sidebar no longer has a "Download" button next to it and instead shows a small green dot or a check mark.

Paste the foreign-language email into the chat

Click inside the chat box at the bottom of the window (it usually has placeholder text like "Type a message…" or "Ask me anything…"). Then go to the foreign-language email in your browser or mail app, select the whole message with Ctrl + A, copy it with Ctrl + C, and paste it into the chat box with Ctrl + V. The text appears in your language. Press Enter to send. A short pause later — usually a few seconds — the model's answer streams in line by line.

You'll know it worked when text starts appearing word by word in the chat area, and the model ends with a clear English paragraph rather than an error message.

Ask for the translation and the summary in one go

Now send a follow-up message that tells the model exactly what you need. A good instruction names the source language, the target language, and the extra thing you want (a summary of the ask). Think of the chat box as a place where you write the prompt — the instruction you give the AI. The more specific the prompt, the better the answer.

If you don't know the source language, ask the model to detect it first:

You'll know it worked when the reply has two clearly separated parts: a translation and a short summary that names an action, a date, or a question the sender is asking about.

Add a PDF instead of plain text

For longer documents, you don't have to copy and paste by hand. Look near the chat box for a small paperclip icon, an attachment icon, or a button labeled Add file or Upload document. Click it, browse to the PDF on your computer, and select it. The file name appears above the chat box. Now type a prompt that refers to "the attached document" rather than "the text above."

If you don't see a paperclip icon, look inside a + (plus) button, a ⋯ (three dots) menu, or a separate Documents tab in the sidebar — NVIDIA occasionally moves this control between releases. You can also fall back to opening the PDF in another program, selecting all with Ctrl + A, and pasting the text into the chat as in Step 3; PDFs that are scanned images won't paste as text, in which case you'll need an OCR step (a tool that reads text out of images) first.

You'll know it worked when the model writes back using details from the PDF — names, dates, amounts — that you never typed into the chat yourself.

Save the translation for later

Most people want to keep the translation somewhere they can find it again. Click anywhere inside the model's reply in the chat to place your cursor there, then press Ctrl + A to select the whole answer and Ctrl + C to copy it. Open any text editor — Notepad, Word, Google Docs — and paste with Ctrl + V. Give the file a clear name like Supplier-email-translation-2026.txt. ChatRTX itself does not have a built-in "save" button, so this copy-and-paste step is how you keep a record.

You'll know it worked when you can close ChatRTX, reopen the saved file, and read the translation without launching the app again.