File Converter Pro - Open‑source offline all‑in‑one converter for Windows
File Converter Pro (FCP) is an open-source desktop app for Windows that converts documents, images, audio and video entirely offline - no cloud uploads, no telemetry, no internet required. Built with Python + PySide6, the UI is remarkably polished: automatic Dark/Light mode following Windows, glassmorphism visuals and smooth animations, native Drag & Drop + Context Menu support, a tidy dashboard and true batch conversion capability.
Format support is extensive: Documents - PDF, DOCX, XLSX, PPTX, EPUB, HTML, CSV, JSON; Images - PNG, JPEG, WEBP, HEIC, TIFF, SVG, AVIF; Audio/Video - MP3, WAV, FLAC, MP4, MKV, WEBM (via ffmpeg). It even adds an achievement system and dashboard analytics to gamify routine file work.
Practical use cases include offline Word/Excel/PPT to PDF conversion, bulk image processing for designers/editors, fast local video/audio transcodes, handling sensitive files without uploading, and replacing web converters like ILovePDF/CloudConvert. Focused on Windows 10/11, FCP is offered as both a portable build and an installer.
#OpenSource #Windows #DeveloperTools