Your files stay on your Mac.
Convertessa composites every layer in a PSD file and encodes the result as a WebP image. You can set the output quality for lossy compression, and the original pixel resolution is preserved exactly. Every file is processed locally — nothing is uploaded to a server.
Drag one PSD file or an entire folder of PSDs onto Convertessa. Batch mode processes all files in one pass.
Pick WebP from the output format list. Adjust the quality slider to balance file size and visual fidelity — WebP is a lossy format, so quality is yours to set.
Click Convert. Convertessa flattens each PSD layer stack, strips EXIF and embedded metadata, and writes a WebP file beside the original.
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 composites the full layer stack of each PSD before encoding, so the output WebP reflects the final visible image.
Yes — WebP is a lossy format. Use the quality slider in the app or pass --quality <0-100> on the command line to tune the result.
Yes. Convertessa strips EXIF and embedded metadata from the WebP output. The source PSD is never modified.