A default handler for multiple file types that opens the right editor — Velja/Choosy for files. Full control of any file type and what editor(s) open it, with radial picker and custom rules.
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sleepyfox
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filerouter.app
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FileRouter is a macOS utility that acts as a default handler for multiple file types — but it never opens anything itself. Instead, when you double-click a file, FileRouter steps in and routes it to whichever editor or app your rules specify. Think of it as Velja or Choosy, but for files: a smart intermediary that gives you full control over which application opens what, without forcing you to change system defaults one by one.
When FileRouter can’t decide on its own, a radial menu appears around your cursor, letting you pick the right editor in one quick motion. Keyboard shortcut badges are shown right on the menu, so you can learn and trigger your most-used actions without even looking.
You can create rules that map file types — or even specific files — to specific editors. For example, you can set every Markdown file to open in MMDComposer5 and Marked simultaneously, or route different file extensions to different apps based on your workflow.
FileRouter lets you define an order of preferred editors for each file type. If your top choice isn’t running or isn’t available, it falls through to the next one — giving you a graceful, predictable fallback chain without any extra clicks.
The settings panel gives you granular control over defaults, URL schemes, and rule behavior. You can fine-tune everything from general behavior to the exact order of editors, all from a clean, native macOS interface.
FileRouter is the missing link between your files and the right tool — it never opens anything, yet it decides everything.
That’s the core insight: most apps either force you into a single default or make you manually choose every time. FileRouter sits in between, applying your rules automatically while still giving you a fast, visual override when needed. It’s a genuinely new take on file handling that feels obvious once you see it — and it’s available as a free trial, on the Mac App Store, or via Setapp.
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You’re tired of fighting “Open With” dialogs, you work across multiple editors daily, or you want a consistent, rule-based way to handle every file type on your Mac. FileRouter is especially valuable for Markdown users, developers, and anyone who has ever wished their Mac just knew which app should open a file.
