https://github.com/fulgur-app/Fulgur

Your lightning fast, multiplatform, themable text editor, with synchronization between instances!
https://github.com/fulgur-app/Fulgur

editor fulgur gpui gpui-component linux macos multiplatform rust synchronization text-editor windows

Last synced: 3 months ago
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Your lightning fast, multiplatform, themable text editor, with synchronization between instances!

• Host: GitHub
• URL: https://github.com/fulgur-app/Fulgur
• Owner: fulgur-app
• License: apache-2.0
• Created: 2025-11-05T17:10:30.000Z (7 months ago)
• Default Branch: main
• Last Pushed: 2026-03-01T15:14:52.000Z (3 months ago)
• Last Synced: 2026-03-01T17:54:23.588Z (3 months ago)
• Topics: editor, fulgur, gpui, gpui-component, linux, macos, multiplatform, rust, synchronization, text-editor, windows
• Language: Rust
• Homepage: https://fulgur.app
• Size: 1.8 MB
• Stars: 4
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: licenses/about.hbs

Awesome Lists containing this project

• awesome-gpui - Fulgur - fast, multiplatform, fully themed text & code editor with secured file sync between devices. (Apps / Developer Tools)

README

          
# Fulgur

![](assets/icon_square.webp)

Your lightning fast, multiplatform, themable text editor, with synchronization between instances!

## Running Fulgur on MacOS

Fulgur is not signed yet. If Fulgur is tagged as damaged by MacOS, just run `xattr -dr com.apple.quarantine /Applications/Fulgur.app` and enjoy Fulgur!

## About Fulgur

### What is Fulgur?

Fulgur is a **straightforward text editor** built for speed and reliability across multiple platforms. It's not designed to replace full-featured IDEs like VS Code, IntelliJ, or Zed, nor does it aim to match the extensive capabilities of editors like Emacs or Vim. Instead, Fulgur focuses on being fast, dependable, and **built with modern technologies**.

Themes are a core part of the Fulgur experience, with several included by default.

Version 0.2.0 also introduces Sync mode, allowing you to **securely send files between Fulgur instances** similar to how you share tabs between browsers. The best part: [Fulgurant](https://github.com/fulgur-app/fulgurant), **the open source sync server, is self-hostable**, keeping your data private.

Version 0.3.0 introduces **multi-window support**, allowing you to open multiple Fulgur windows simultaneously, as well as a much more **robust and secure end-to-end encryption system** using the system's keychain. As a result it limits compatibility issues on some desktop environments on Linux.

### Screenshots

![](assets/readme/fulgur_1.webp)

↑ The main window.

![](assets/readme/fulgur_2.webp)

↑ Markdown preview and toolbar.

![](assets/readme/fulgur_3.webp)

↑ The share panel when connected to  Fulgurant server.

![](assets/readme/fulgur_4.webp)

↑ The theme selection panel.

### Limitations

Fulgur is currently in alpha development. While it has been stable in testing, several features are still being implemented and issues remain to be resolved:

* Drag and drop support

* Profiles support

* DONE in 0.3.0 ~~Multi-windows support~~

* Syntax highlighting for additional languages

* DONE in 0.2.0 ~~Sync mode functionality~~

* Various edge cases

* Compatibility issues on some desktop environments on Linux

**Note that breaking changes may occur in future releases until v1.0.0.**

### Themes

Fulgur themes use the `gpui-component` format, configured with JSON files and hexadecimal color codes. Bundled themes are located in `src/themes` and will be stored in `~/.fulgur/themes` when installed. You can modify existing themes or create your own.

## Build

### Prerequisites

#### All platforms

[Rust](https://rust-lang.org/) 1.90.0 is the minimum supported version.

Install [cargo-packager](https://github.com/crabnebula-dev/cargo-packager) with `cargo install cargo-packager --locked`. It will bundle the app with a nice icon for each platform.

Install [cargo-about](https://github.com/EmbarkStudios/cargo-about) with `cargo install cargo-about --locked`. It will generate the list of third parties licenses, as per the Apache 2.0 license's terms.

#### MacOS

Xcode must be installed (e.g. from the App Store) as well as the Xcode command line tools: `xcode-select –-install`.

#### Windows

Install the [Windows SDK](https://developer.microsoft.com/en-us/windows/downloads/sdk-archive/) matching the version of your OS and make sure that `fxd.exe` (matching your architecure e.g. x86-64, arm...) is in the path.

### Build Fulgur

Once all the prerequisites installed and set up:

* Run `cargo build --release` to build an optimized version of Fulgur. May take some time on older systems.

* Run `cd license && ./generate_license_file.sh` to update the 3rd party licences list if you plan to distribute Fulgur.

* Run `cargo packager --release` to build an optimized version of Fulgur and make a pretty executable with an icon.

## License

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.