OmniMedia is a self-hosted media processing toolkit for video, audio, GIF, and image tasks. Compress videos with configurable quality, codecs, and resolutions; extract audio in several formats; or convert video clips to GIF with adjustable frame rate and size. Browser-based image tools let users compress, resize, crop, and convert images, create favicons and QR codes, and combine images into PDFs. The FastAPI backend uses FFmpeg for server-side video and audio processing, while image tools process files in the browser. OmniMedia supports 13 languages and can be deployed with Docker Compose. Temporary uploads and generated media are automatically cleaned up according to the configured retention period.