Developers have created open-source, portable GUI clients that connect to the official DeepL API. You input your DeepL API key (available with Pro subscriptions), and the client sends your text to DeepL’s servers for translation. Examples include:
One of the biggest time-saving features is the ability to translate entire documents with a single click. DeepL Pro 1.1.10 supports common formats like Microsoft Word (.docx), PowerPoint (.pptx), and Text (.txt) files. Crucially, the software preserves all your original fonts, images, and formatting. Once translated, you can edit the document further if needed. deepl pro 1110 portable
This is (requires internet), but it is portable, safe, and free (up to 500k chars/month). DeepL Pro 1
Translate massive files in seconds while keeping the original fonts, images, and formatting intact. This is (requires internet), but it is portable,
DeepL Pro subscriptions allow activation on (Windows/macOS desktop apps, mobile apps, web logins). If you frequently switch between a home PC, work laptop, and university computer, simply install the desktop app on each or use web login. No need for a problematic portable version.