Jollycat is a native macOS file converter that handles images, videos, audio, documents, and PDFs — all running locally on your Mac with zero cloud uploads. Drop files in, pick a format, and Jollycat routes through 9 bundled open-source engines to find the optimal conversion path across 1,650+ possible routes. It also supports AI image upscaling, OCR, speech-to-text and text-to-speech, and others. Jollycat also ships a built-in MCP server, letting AI coding agents convert files on their own.