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Klarfile

Validate a Factur-X, UBL or XRechnung e-invoice, no upload

An invoice carries an IBAN, a turnover figure, a customer's identity. This one stays in the tab: there is no server to receive it. Drop it in, and read what would get it rejected.

What this tool does

What it does not do: This is not a certification, and we are not an accredited platform: we issue no attestation. The report says "no error detected across the N rules tested", never "compliant invoice": full PDF/A validation needs veraPDF, which nothing matches in a browser. The repair guesses nothing, and that is its limit: we only correct what changes no value. A total that does not add up, a missing VAT number, a date written "01/09/2026" (day or month?) are not corrected, and the screen says why. Repair works on one invoice at a time; batches are checked whole.

Nothing is uploaded. Cut your network connection once this page has loaded: the tool keeps working. How to check it yourself.

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