Convertessa.app
Convert images, audio, video, documents, archives & eBooks entirely on your Mac — 100% offline, no uploads, no account. $19 once, lifetime license.
A startup from Tajikistan that is founded by Daler Azimov.
Convert images, audio, video, documents, archives & eBooks entirely on your Mac — 100% offline, no uploads, no account. $19 once, lifetime license.
A startup from Tajikistan that is founded by Daler Azimov.
This page is designed to help you find out whether Convertessa.app is good and if it is the right choice for you.
Convertessa is a native macOS app that converts your files between formats — images, audio, video, documents, archives and eBooks — entirely on your Mac. Drop a file in, choose an output, and it’s done. No uploads, no account, no subscription.
Listed in
Batch Conversion
Convert hundreds of files at once with per-type group defaults and individual overrides.
Modern image formats
First-class support for HEIC, AVIF and WebP — encode and decode, both ways. Read JPEG XL and a dozen more modern formats too.
Drag & Drop Interface
Drop files anywhere on the window. Native, instant, and exactly what you’d expect on a Mac.
File Quality
Dial in compression, resolution and bitrate. Keep originals pristine or shrink for sharing.
Renaming
Never overwrite a file by accident. Convertessa appends safe suffixes automatically.
Conversion History
Every job is logged locally. Re-run a previous conversion or revisit recent outputs in a click.
Archiving
Bundle your converted files straight into a single ZIP, TAR or 7z — packaged and ready to share the moment a job finishes.
Convert from Finder
Right-click any file in Finder and choose Convert. A Quick Action handles it on the spot — no need to open the app first.
Compact Mode
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.
Convertessa is a native macOS file converter that does all its work on your Mac. Nothing is uploaded, and you don't need an account or an internet connection. It covers 1100+ conversion combinations across images, audio, video, documents, archives and eBooks, all in one app. Behind the scenes it runs trusted open-source engines through a single native interface. It also has a command-line tool that uses the same engine, plus right-click conversion in Finder.
Mac users who convert files often and care about where their files go. That includes: - Privacy-conscious people handling sensitive or confidential documents and photos - People fed up with ad-filled "convert X to Y" websites - Photographers and content creators who batch-convert, for example HEIC to JPG, or video to video - Developers and power users who want to script conversions from the terminal
A close friend of mine, who works as a photographer and videographer, once asked me to upload some of his videos to YouTube. He sent me the RAW files, and each one was around 40–60 GB.
With my internet speed, uploading them to an online converter would have taken forever. So I thought, why not build a simple tool to convert them locally?
That’s how Convertessa started. I built it for that one problem, but it turned out to be useful enough that I now use it myself almost every day.
App: Swift and SwiftUI with AppKit. Conversion engines: FFmpeg, Pandoc, libvips, LibreOffice, Calibre, fontTools.
Loves that it is built natively, works very fast
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