KnifeLemon

Filee is a free open-source file converter built with C# and Avalonia (MIT): hold Ctrl/Option and drag files to pop up a donut toolbar of formats right at your cursor, converting 180+ formats fully offline without Office, with Windows 10/11 as the flagship and macOS/Linux in preview

v1.12.0
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Latest release

v1.12.0Oct 19, 2026, 02:24 AM
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README

Project Overview

Filee is a free, open-source file converter: hold a modifier key, drag files, and a donut of formats appears right at your cursor - drop on one and the conversion is done. It handles 180+ formats entirely offline, with no need for Office or other heavyweight software.

Drag, drop on a format, done - right where your cursor is.

Key Features

  • Donut toolbar at the cursor: hold Ctrl (Option on macOS) while dragging files; the ring shows only formats valid for that file type
  • 180+ formats offline: images, PDF, Word, Excel, PowerPoint, HWP, e-books, archives, fonts and CAD without Office installed
  • Batch in parallel: convert one file or a hundred at once; a single failure never stops the rest
  • Multi-step routes: automatically plans chained conversions (e.g. HWP → HWPX → DOCX), using the best engine per step
  • Presets: quality, size, DPI, metadata, PDF merge/split, video and audio parameters, output folder and naming can all be saved
  • Watch folders: files dropped into a chosen folder convert automatically once fully written, turning it into an inbox
  • Command line: filee convert and filee watch for scripted use
  • Reuses system engines: already-installed FFmpeg, calibre, Pandoc, Ghostscript and LibreOffice are detected and used
  • Three languages: English, 한국어 and 简体中文, following the system language

Target Audience

  • Office workers converting documents daily
  • Designers handling batches of images
  • Operations staff needing bulk format changes
  • Privacy-minded users who keep files offline

Quick Start

  1. Download Filee-*-win-Setup.exe from Releases and install (or unzip the Portable build and run it)
  2. Hold Ctrl and drag files, then drop them on a format in the donut at your cursor
  3. Results are saved next to the original files

Core Advantages

  • No window to open: the toolbar appears where you already are
  • Zero uploads: everything runs offline, files never leave your computer
  • Transparent engines: Settings lists every engine with its version and job

System Requirements

Item Requirement
Windows 10 / 11 x64 (official)
macOS 14 or later (preview, Apple Silicon / Intel)
Linux x64 / ARM64 (preview)

Notes

  • Drag gestures on Linux need an X11 session; on Wayland use the right-click action and drop zone instead
  • macOS builds are not notarized yet; allow the first start under Privacy & Security
  • Option+drag on macOS requires granting Accessibility permission
  • Some video, audio and rare formats rely on optional engines; pick them during setup

Release history

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