Your files stay on your Mac.
iTunes M4V is Apple's video container, used for movies, TV shows, and music videos. Converting M4V to FLAC extracts the audio track and encodes it as lossless audio — no quality loss, no upload. The resulting FLAC file plays in any audio player that supports the format.
Drag one file or an entire folder of M4V videos into Convertessa. Batch processing handles whole libraries in one pass.
Choose FLAC from the output format list. FLAC is lossless, so the audio track is preserved exactly as encoded in the original M4V.
Click Convert. Convertessa extracts and encodes the audio on your Mac — files never leave your device.
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.
No. FLAC is a lossless format, so the audio track from the M4V is preserved bit-for-bit. Nothing is discarded or re-encoded at lower quality.
Yes. Convertessa strips embedded metadata from the source file during conversion, so the output FLAC contains no residual tags from the original M4V.
Yes. Drop the folder onto Convertessa or run convertessa /path/to/folder --to flac from the terminal to batch-convert every M4V in the folder.