About Skeemrr
Skeemrr is an e-invoicing validation tool brewed in the USA by Pat at SkeeterLab. It was originally built as a tool for a client who needed reliable, multi-format Schematron validation without the overhead of Java or heavyweight XSLT pipelines.
The engine evaluates Schematron business rules natively in JavaScript using XPath 3.1, covering 21 international e-invoicing formats including FatturaPA, PEPPOL BIS 3.0, XRechnung, EN 16931, ZUGFeRD/Factur-X, and national implementations for the Netherlands, Romania, Portugal, and Denmark.
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Legal
Skeemrr is currently available to users in the United States only. Validation results are informational and do not constitute legal or tax advice.