RED PDF is an online service for handling everyday PDF tasks through a simple browser-based interface. Designed for study and work, it brings document organization, optimization, conversion, editing, and security tools together in one place. Users can combine or split PDFs, rearrange, rotate, or delete pages, and create PDFs from images. The service also offers compression, conversion between PDF and Word or office formats, and export to image files. Editing features include adding text, images, and watermarks, while other tools can extract images, recognize text in scanned documents using OCR, and add or remove password protection.

RED PDF says its tools are designed for fast processing and ease of use, with some operations handled locally in the browser. The company states that its servers are located in Russia and that data processing is carried out in accordance with Russian personal-data requirements. Users can try the service before paying, with both one-day access and monthly plans available. RED PDF is operated by individual entrepreneur K. V. Karabanov.