Alchemy is an impressive, open-source file converter built on the reliable Electron and React. It offers a variety of operations, including the ability to merge files into a PDF. Its features include an elegantly simple, drag-and-drop interface for converting and merging files, as well as the option to merge multiple images into a single PDF, with the added benefit of being able to change the file order.
Additionally, it allows for batch conversion of multiple files to various file types, making it a versatile tool for any user's needs.
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AllToMP3 is a desktop application to download and convert YouTube, SoundCloud, Spotify and Deezer in 256 kb/s MP3, with tags: cover, title, artist, genre, and even lyrics!. It supports YouTube playlists, Deezer and Spotify playlists, and also integrate a search engine so you can simply specify a song name or an album and AllToMP3 will download it.
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calibre is an e-book manager. It can view, convert, edit and catalog e-books in all of the major e-book formats. It can also talk to e-book reader devices. It can go out to the internet and fetch metadata for your books. It can download newspapers and convert them into e-books for convenient reading. It is cross platform, running on Linux, Windows and macOS.
Calibre is a strong eBook suite that do more than displaying eBook files. It offers converter to convert eBook file formats, organize your eBook library and collections, and it works seamlessly on Windows, Linux, and macOS
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HandBeak is a video converter and transcode engine for macOS, Windows and Linux. It's free and open source. I have used it several times for my videos it's really easy to use has built-in preset library, supports multiple input sources and dozens of formats and quality options.
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