Editorio

You shouldn't have to wait for your text editor.

Editorio is the fastest, quietest Markdown editor on Mac. Open a file. See it render. Write. No spinners, no progress bars, no "loading…" dialog from a web view pretending to be an app.

Built entirely with AppKit. No Electron. No Chromium. No JavaScript runtime sitting between you and your words. Native macOS, end to end.

WRITE AND PREVIEW AT THE SAME TIME

Source on the left, live preview on the right, separated by a divider you can drag. Type a heading and watch it format itself. Add a checklist and the boxes appear instantly. The render keeps up with you, not the other way around. Each pane has its own minimap so you can navigate the raw text and the rendered output independently.

Prefer one pane at a time? Switch between Source and Preview with a single keystroke. Recent edits are reflected the moment you toggle. No save, no "rebuilding preview", no waiting.

THE SPEED YOU EXPECTED A TEXT EDITOR TO HAVE

Files open in under 100 milliseconds. Scrolling runs at 60 frames per second with native scroll physics. The app launches in under half a second. Memory stays around 35 MB. Multi-megabyte Markdown files and 50 MB-plus memory-mapped text files work without breaking a sweat.

These aren't marketing numbers. This is what happens when an editor is built on native frameworks instead of a browser engine.

SYNTAX HIGHLIGHTING FOR 180+ LANGUAGES

Swift, Python, JavaScript, TypeScript, Go, Rust, C, C++, Java, Kotlin, Ruby, PHP, HTML, CSS, SQL, Bash, YAML, JSON — and 170 more. Open any source file and the right grammar is detected automatically. Open a Markdown file and fenced code blocks are highlighted in the preview pane.

DESIGNED, NOT THROWN TOGETHER

Four hand-tuned themes ship in the box: Default Dark (Monokai-inspired), Default Light (Sublime-inspired), Nord, and Solarized Dark. Editorio also follows your system appearance and flips between light and dark automatically.

A Sublime-style minimap on the right gives you a bird's-eye view of any document. Click or drag to jump anywhere. Line numbers update live as you type. The gutter and the editor body scroll in lockstep — no drift, no glitch, no compromise.

THE LITTLE THINGS

• Native macOS tabs — open multiple files in one window

• Sidebar file browser

• Distraction-free mode for long writing sessions

• Export to PDF and Print with proper page breaks

• Find and Replace with regex

• Quick Open and Symbol Outline palette

• Smart bracket and quote pairing

• Emoji shortcodes — type :rocket: and get :rocket:

• Status bar with language, word count, encoding, line and column

YOUR FILES STAY ON YOUR MAC

No accounts. No sign-in. No analytics. No telemetry. No advertising SDKs. The privacy nutrition label is "Data Not Collected" across every category. The app makes one optional network request — a once-per-day update check — and you can disable it.

SUPPORTED FORMATS

Markdown (.md, .markdown, .mdown, .mkdn), Swift, Python, JavaScript, TypeScript, Go, Rust, C/C++, Java, Kotlin, Ruby, PHP, HTML, CSS, SCSS, JSON, YAML, TOML, XML, SQL, shell scripts, LaTeX, Julia, plain text, and more.

FREE. FOREVER.

No trial. No subscription. No upgrade prompts. No feature gates. No "pro" tier. Editorio is free to download and free to use, with every capability unlocked from day one.

Download it. Open one of your files. See for yourself.