Your files stay on your Mac.
Convertessa reads your WMV files and rewraps the video and audio into an MPEG-TS container — the transport-stream format used in broadcast pipelines, hardware encoders, and streaming receivers. You choose the output quality; the converter handles the rest. Nothing is uploaded: every file is processed locally on your Mac.
Drag one WMV file or an entire folder into Convertessa. Batch mode processes every WMV in the folder in one pass.
Pick MPEG-TS from the output format list, then set quality to control how much the encoder compresses each file — higher values preserve fidelity, lower values shrink file size.
Click Convert. Convertessa processes your files locally — no upload, no account required — and writes the .ts files alongside your 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 encodes the video stream into the MPEG-TS container. Use the quality setting in step 2 to control the trade-off between file size and visual fidelity.
Yes. Drop the folder onto Convertessa or pass the folder path to the CLI with convertessa ./folder/ --to ts. Every WMV file inside is converted in one batch.
No. Convertessa runs entirely offline. Your WMV files are processed on-device and the resulting .ts files are written to your local disk — nothing is sent to a server.