Fulgur
What Fulgur is
Fulgur is a free, open-source text editor for Windows, macOS and Linux. It uses GPU acceleration, supports themes, and handles text formats including Markdown, CSV and log files. Syntax highlighting is listed for more than 50 languages, while the repository describes more than 60. Editing tools include multi-cursor editing, column editing and large-file handling. A Markdown toolbar and live preview are included, and users can select curated themes or make their own. Fulgur works offline and standalone except when synchronizing files through Fulgurant. Synced files use end-to-end encryption, and users may run their own Fulgurant server. The editor can edit remote files over SSH. Fulgur is built with Rust and GPUI and remains in active development. It is licensed under Apache License 2.0. Linux synchronization-key storage requires a Secret Service provider such as GNOME Keyring or KWallet.
Who it suits
Fulgur suits developers and other users who want a no-cost editor for common text formats across major desktop systems. It also fits people needing encrypted, self-hosted synchronization or offline editing.
What it does well
- Free and open source under Apache 2.0
- Multi-cursor, column and large-file editing
- Markdown toolbar with live preview
- End-to-end encrypted file synchronization
- Remote editing over SSH
What to know first
- Linux sync keys require Secret Service
- Synchronization needs Fulgurant
- Active development status may mean ongoing changes
Verdict
Fulgur offers broad desktop support, substantial editing tools and optional encrypted synchronization without a paid plan. Users should account for the separate Fulgurant setup and Linux key-storage requirement when planning sync use.
Facts from Fulgur's own pages
- Column editing
- Yes · fulgur.app, 24 Sept 2026
- Development status
- Fulgur is under active development. · fulgur.app, 10 Oct 2026
- Downloads
- The listed packages are a signed and notarized macOS Apple Silicon DMG, a Windows x86-64 installer, and Linux x86-64 or aarch64 AppImage or DEB packages. · github.com, 10 Oct 2026
- Encrypted sync
- Files shared between devices are end-to-end encrypted, and the sync server does not see plaintext. · github.com, 10 Oct 2026
- File formats
- The editor supports text-based file formats, including Markdown, CSV, and log files. · github.com, 10 Oct 2026
- File sync
- Fulgur shares text files across devices through Fulgurant, using end-to-end encryption. · fulgur.app, 9 Oct 2026
- Free plan
- Yes · fulgur.app, 24 Sept 2026
- Large-file handling
- Yes · fulgur.app, 24 Sept 2026
- License
- Fulgur is licensed under Apache License 2.0. · github.com, 10 Oct 2026
- Linux requirement
- On Linux, storing sync encryption keys requires a running Secret Service provider such as GNOME Keyring or KWallet. · github.com, 10 Oct 2026
- Markdown
- Fulgur includes a Markdown formatting toolbar and preview. · fulgur.app, 10 Oct 2026
- Multi-cursor editing
- Yes · fulgur.app, 24 Sept 2026
- Offline use
- Fulgurant is needed only for synchronization; other Fulgur features work standalone and offline. · fulgur.app, 9 Oct 2026
- Platforms
- The official site lists Windows, macOS, and Linux as supported platforms. · fulgur.app, 9 Oct 2026
- Pricing
- The official site describes Fulgur as free to use and open source. · fulgur.app, 9 Oct 2026
- Product
- Fulgur is a native, GPU-accelerated text editor with file synchronization. · fulgur.app, 10 Oct 2026
- Remote editing
- Fulgur can edit files on remote machines over SSH and includes an integrated file browser. · github.com, 10 Oct 2026
- Self-hosting
- File synchronization uses Fulgurant, an open-source server that users can self-host. · fulgur.app, 10 Oct 2026
- Standalone use
- Fulgur’s features other than file synchronization work standalone and offline. · fulgur.app, 10 Oct 2026
- Supported platforms
- Windows,macOS,Linux · fulgur.app, 24 Sept 2026
- Synchronization setup
- Fulgur generates a unique API key for each device to connect instances to a Fulgurant server. · fulgur.app, 9 Oct 2026
- Syntax highlighting
- The repository describes syntax highlighting for 60+ languages. · github.com, 10 Oct 2026
- Technology
- Fulgur is built with Rust and GPUI. · fulgur.app, 9 Oct 2026
- Text formats
- Fulgur supports text-based file formats and syntax highlighting for 50+ languages. · fulgur.app, 9 Oct 2026
Where Fulgur stands on Freedom251
- Text Editors#32 of 82