How to Convert MOBI to EPUBConvert a MOBI ebook to EPUB in calibre or Calibre Zen: add the book, pick the output format and profile, end up with a real table of contents, and send it to your reader.
What Is an Opus File? The Audio Codec ExplainedOpus is an open audio format that sounds better than MP3 at the same file size. Here's what it is, where you'll meet it, and how to open and convert it.
How to Convert MOBI to AZW3Convert a MOBI ebook to AZW3 (KF8) in calibre or Calibre Zen: check what your file really is, set the output format and a Kindle profile, and move it to your Kindle by USB.
Best Open Source Apps for Linux: 2026Six free and open source apps that cover the daily jobs on a Linux desktop: books, video, images, office work, audio and streaming. All checked at their own sites in October 2026.
What Format Are Audiobooks In? M4B, MP3 and AAXAudiobooks come as M4B, MP3 or Audible's protected AAX, and streaming apps give you no file at all. Here is each format, how to check what you have, and what plays it.
How to Convert EPUB to MOBIConvert an EPUB to MOBI in calibre or Calibre Zen: add the book, pick the output format and a Kindle profile, and send the result to your reader.
Calibre Alternatives: Same Books, Different ToolsMost calibre alternatives are front ends or readers, not full replacements. Here is what each one actually keeps, and when staying on calibre is the smarter pick.
Calibre Zen vs calibre: Same Library, a Calmer InterfaceCalibre Zen is calibre with a new interface on top. Here's what's the same, what changed, and when stock calibre is still the better pick.- Ampliflare Audio 1.0: Offline Noise Removal, Now Open SourceAmpliflare Audio 1.0 strips background noise from speech on your own computer, on Mac, Windows and Linux. The same day, its source went public under the AGPL.
Ampliflare Audio 1.0Ampliflare Audio 1.0 lets you choose where results go, rebuilds the Split tool and adds licenses for commercial use. 1.0.1 bundles ffmpeg and makes the source public under the AGPL.
Calibre Zen 0.2: Move From calibre in One ClickCalibre Zen 0.2.0 brings your calibre settings, library and plugins over in one click, and adds updates from inside the app, a smaller Edit metadata window and a Flatpak.