§I

Submit your feed

By URL, by file, or by paste. We'll inspect it in your browser — nothing is uploaded.

Enter the URL to your appcast.xml file. We'll fetch it through our proxy and validate it for you.

Drop your appcast.xml here · or browse

Sparkle is the standard framework for delivering software updates to macOS apps. It reads an appcast.xml feed to discover new versions. This tool catches mistakes before your users do — checking signatures, versions, URLs, and sixty-odd other rules drawn from the Sparkle documentation.

§II

From the terminal

Install the CLI for local validation and CI/CD integration.

npm $ npm install -g sparkle-validator
brew $ brew install dweekly/sparkle-validator/sparkle-validator
npx $ npx sparkle-validator https://example.com/appcast.xml

--check-urls verify links --strict mode JSON output stdin support

§III

In your pipeline

Validate appcasts automatically on every push.

- uses: dweekly/Sparkle-Validator@v1
  with:
    file: appcast.xml

strict mode check-urls option JSON output View on Marketplace ↗

§IV

Schema validation

Validate offline against our XSD schema with xmllint.

$ xmllint --schema https://sparklevalidator.com/appcast.xsd \
        --noout your-appcast.xml

appcast.xsd sparkle-appcast.xsd