musescore / musescore/MuseScore
Plugin upload does not accept .mext files on musescore.org plugin area
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@shoogle is already working on this.
Since May 5, 2026.
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Description
Description
When trying to upload a plugin to musescore.org, .mext files are rejected by the upload form.
Error message:
The specified file could not be uploaded. Only files with the following extensions are allowed: ...
However, MuseScore plugins are distributed as .mext files, so this format should be accepted on the plugin upload page.
Steps to reproduce
- Go to https://musescore.org/en/plugins
- login with your musescore account
- Create a new plugin or edit an existing one
- Try to upload a new file with
.mextextension - Submit the form
- The error appears
Note: that you can upload a plugin in theqml format
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
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