Your files stay on your Mac.
Converting AZW3 to TXT pulls the written content out of Amazon's Kindle container and writes it as unformatted plain text. Fonts, layout markup, and embedded metadata are dropped — only the words remain. The result opens in any text editor, script, or processing pipeline without a Kindle app.
Drag one AZW3 file or an entire folder of ebooks onto Convertessa. Everything stays on your Mac — no upload, no account required.
Select Plain Text from the output format list. Convertessa will write one .txt file for every AZW3 you dropped.
Click Convert. Convertessa processes each file locally and saves the plain-text output alongside the originals.
Images, audio, video, documents, archives and eBooks — all converted natively, right on your Mac.
Pick a format you have — see everything Convertessa can turn it into.
Convert hundreds of files at once with per-type group defaults and individual overrides.
First-class support for HEIC, AVIF and WebP — encode and decode, both ways. Read JPEG XL and a dozen more modern formats too.
Drop files anywhere on the window. Native, instant, and exactly what you’d expect on a Mac.
Dial in compression, resolution and bitrate. Keep originals pristine or shrink for sharing.
Never overwrite a file by accident. Convertessa appends safe suffixes automatically.
Every job is logged locally. Re-run a previous conversion or revisit recent outputs in a click.
Bundle your converted files straight into a single ZIP, TAR or 7z — packaged and ready to share the moment a job finishes.
Right-click any file in Finder and choose Convert. A Quick Action handles it on the spot — no need to open the app first.
Shrink Convertessa to a tidy mini window that tucks into a corner — just a drop zone and a format picker for quick, one-off conversions.
No cloud. No account. No upload. Every conversion happens entirely on-device, using the power already in your Mac. What you convert is nobody’s business but yours.
Script conversions, wire them into your build, or batch a folder from the terminal. The same engine, no GUI required.
Read the full CLI documentation →Shrink Convertessa down to a small, focused window — drop, convert, done, with your recent conversions one click away.
macOS 14+ · Apple Silicon & Intel
New formats, new features, and fixes — every release, on the record.
Yes. Convertessa extracts the full body text from the AZW3 container. Decorative elements such as fonts and layout are not preserved, but every word of the book's content is written to the .txt file.
Yes — drop a folder onto Convertessa or pass a directory path via the CLI and every AZW3 inside is converted in one pass. Output files are written to the same folder with the .txt extension.
Never. Convertessa runs entirely offline. No file is uploaded to a server or third-party service at any point during conversion.