These lightweight tools run directly from a USB drive (or your Downloads folder) without touching the Windows registry or leaving a trace. Here are the best truly free options that work right now.

Unlike standard software, a portable app:

(PDF Split and Merge) is the gold standard for portable PDF manipulation. While its "enhanced" version costs money, the free portable version handles 90% of daily tasks.

Editing complex documents with mixed formatting.

: Excellent for fixing typos or signing contracts quickly in-browser.

It won't edit text directly. For that, pair it with tool #2.