Try a synthetic example
The demonstration above uses a fictional invoice with a missing buyer reference, then its corrected replacement. The example uploads no file. Sample results show the checks actually run when the fixtures were generated.
Inspect your own original
Use the instant check above to inspect your own XML or hybrid PDF up to 10 MiB without an account. You see the verdict and the leading findings. The check runs in your browser with the same versioned rules as the workspace; the file is not uploaded. The free workspace additionally shows every finding, the detected format and readable fields. Received originals remain read-only. For ZUGFeRD PDFs see the ZUGFeRD validator.
Track a correction
Free includes clear findings and basic downloads. Choose a Fix Pack or subscription when you want replacement comparison, a supplier correction request and evidence export. A technical pass does not guarantee tax correctness or delivery acceptance.