Jummbox
JummBox lets users compose and share instrumental melodies in a browser, storing song data in the page URL.
About Jummbox
JummBox is a modification of BeepBox for sketching and sharing instrumental music. Its editor encodes song data in the browser page URL, updating the URL as edits are made, so a song is saved and shared by copying the URL.
The repository includes the editor interface, a miniature player for embedding on other sites, and synth playback code that can be reused in other projects. The code is available under the MIT license and is written in TypeScript, with separate build commands for the synth, editor, and player.
Key features
- Sketch instrumental melodies in browser-based editor
- Save and share songs by copying page URL
- Embed miniature song player on other sites
- Reuse synth playback code in other projects
- Export songs as .mp3 files
- Build synth, editor, and player separately from source
Best for: People who want to sketch instrumental melodies and share them through URLs.
Good for
- Song data is stored in the URL, copied to save and share
- Includes reusable synth code and an embeddable player
- Source code is available under the MIT license
Watch out for
- Building from source requires node, npm and extra select2 setup
- MP3 export requires the browser to download an external dependency on demand
Jummbox at a glance
- Website
- github.com/jummbus/jummbox
- Category
- Music & Audio › Audio Editing & Production
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Good for
- Creators
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
Guides for Audio Editing & Production
Jummbox alternatives
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Open source
13 alternatives
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GoldBox lets users sketch and share chiptune melodies in a browser, as a modification of JummBox and BeepBox.
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Jummbox FAQ
How do I save or share a song in JummBox?
All song data is packaged into the URL at the top of the browser and updated as you edit. Copy and paste the URL to save and share the song.
Can I use JummBox playback in my own project?
Yes. The synth/ folder contains code to play JummBox songs, which can be used in other projects such as a web game.
What is needed to compile JummBox from source?
The code is written in TypeScript and requires node and npm. Build steps are cloning the repository, running npm install, then npm run build, plus select2 and related type dependencies.
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