Scan, Sign & AI Chat
Mobile App
The mobile app pairs with your account via QR code and brings scanner, signature, chat and documents to your phone.
Free tool
XRechnung validator
Check XRechnung, ZUGFeRD and Factur-X against the key rules of EN 16931 and XRechnung 3.0 – with a check report in plain language. Right in your browser.
More than 60 checks Your file stays on your device
Check an e-invoice
Check XRechnung and ZUGFeRD for mandatory fields, totals and VAT rules.
Your files are processed directly in your browser and are not uploaded. They never leave your device.
How it works
Check an e-invoice in three steps
-
Open the file
Drop the XML file or the ZUGFeRD PDF into the box.
-
Read the report
Errors and notes come with the rule number, the affected field (BT) and a plain explanation.
-
Fix and keep
Download the check report as a text file and pass it on to the sender or your software provider.
What the check covers
Rules checked
- Mandatory fields under EN 16931, for example invoice number, date, currency, seller and buyer
- Calculation rules: sum of lines, net, VAT, gross and amount due
- VAT categories such as standard rate, reverse charge, intra-community supply and exemption
- XRechnung rules, for example Leitweg-ID, contact details and payment instructions
- Check digits of IBAN and Leitweg-ID as well as date and amount formats
Limits of the quick check
The browser check covers the key rules. The official KoSIT validator also checks the XML structure against the schema and all Schematron rules. Whether an invoice is accepted is decided by the recipient's check.
Common errors
- Leitweg-ID or buyer reference missing
- Seller contact details incomplete
- Totals differ because of rounding per line
- Exemption reason missing for reverse charge or intra-community supply
- Electronic addresses of seller and buyer missing (mandatory since XRechnung 3.0)
More with PaperOffice AI
Receive and process e-invoices automatically
Incoming invoices arrive as PDF, scan, photo or e-invoice. PaperOffice AI reads every format in the same workflow, checks the totals and files the invoice in order.
- XRechnung and ZUGFeRD in the same flow as PDF and scans
- Header data, line items, totals and references as fields
- Arithmetic check and audit trail for every invoice
- Filing with a retention period per document type
FAQ
Questions about checking e-invoices
Does the tool replace the KoSIT validator?
No. It checks the key rules of EN 16931 and XRechnung quickly in your browser. The official KoSIT validator also checks the schema and all Schematron rules.
Which formats can I check?
XRechnung in UBL and CII, ZUGFeRD 2.0 or later and Factur-X (PDF with embedded XML), as well as Peppol invoices.
What do BT and BR mean?
BT stands for business term, a field of the EN 16931 standard, for example BT-1 for the invoice number. BR stands for business rule, a rule a valid invoice must meet.
What is a Leitweg-ID?
The Leitweg-ID routes invoices to public authorities in Germany. It is given in the buyer reference (BT-10) and has a check digit that the tool also checks.
Is my data transferred?
No. The check runs entirely in your browser.
More tools
You might also find these useful
Free tools from PaperOffice AI for invoices, deadlines and documents.
