Your files stay on your Mac.
Converting TAR + Gzip to TAR removes the outer Gzip compression layer, producing an uncompressed .tar archive. The directory structure and every file inside are preserved exactly. Only the compression wrapper is stripped — nothing else changes.
Drag one or more .tar.gz archives into Convertessa, or drop a whole folder to process multiple archives at once.
Pick TAR from the output format list. Convertessa will strip the Gzip compression layer and write a plain .tar archive for each file.
Click Convert. Each .tar.gz is decompressed locally and saved as a .tar file beside the original. No upload, no waiting.
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. Only the Gzip compression wrapper is removed. The TAR structure, directory layout, and all contained files are preserved exactly as they were in the original .tar.gz.
Yes. Drop a folder onto Convertessa to batch-convert every .tar.gz inside it, or use convertessa /path/to/folder --to tar from the command line.
No. Convertessa runs entirely offline on your Mac. Your archives are never uploaded or sent anywhere.