Your files stay on your Mac.
Plain text files hold unformatted prose with no structural markup. Converting to Djot wraps that content in a lightweight, CommonMark-inspired markup language built for round-trip fidelity. The output is a .dj file ready for Djot-aware editors, static-site generators, and document pipelines.
Drag one .txt file or an entire folder into Convertessa. Batch mode queues every file at once — no upload, no size cap, nothing leaves your Mac.
Pick Djot from the output format list. Convertessa maps each plain text file to a .dj output, preserving line structure and encoding.
Click Convert. The .dj files land in the same folder as the originals — or your chosen destination — the moment processing finishes.
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.
Djot is a lightweight markup language created by John MacFarlane as a well-specified alternative to Markdown. It uses the .dj extension and is designed for unambiguous parsing and reliable round-trip document processing.
Convertessa wraps your plain text content in a valid Djot document structure. The raw prose is preserved; the conversion establishes the file encoding and container format expected by Djot toolchains.
Yes. Drop a folder onto Convertessa or run convertessa ./folder --to djot in the terminal. Every .txt file in the folder is converted in one pass — no file-by-file repetition needed.