E-invoice viewer and validator: XRechnung, ZUGFeRD, Peppol, DANFE

An online tool for opening and checking electronic invoices: drop an XML, a ZUGFeRD or Factur-X PDF, a ZIP or an e-mail, and it shows the invoice as a readable document, says whether it is a valid e-invoice and explains every failed rule in plain words. The check runs the XML schema and the official EN 16931, XRechnung and Peppol rule sets in your browser; Brazilian NF-e get a DANFE, Saudi QR codes are decoded, Russian UPD files get a print form. You can also issue an XRechnung, a ZUGFeRD PDF or a Peppol invoice and check it before sending.

How to open and check an e-invoice

Drop the file

XML, PDF, ZIP or .eml — or paste the XML or a QR text. Several files at once make a list.

Read the answer

The top line says what the file is and whether it is a valid e-invoice; the reasons are listed under it.

Look at the findings

Each failed rule is explained in plain words; “Show in invoice” highlights the field it is about.

Save what you need

Download a PDF to read and archive (the original XML is attached inside), the XML itself, or — for a batch — a ZIP and CSV files.

Open, check and issue electronic invoices

Drop an e-invoice

XRechnung, ZUGFeRD, Factur-X, Peppol, NF-e, ZATCA, UPD — or many at once

XML · PDF (ZUGFeRD, Factur-X) · ZIP · EML · QR photo · .sig ·

Try an example: 📷 QR photo

Paste XML, a QR text or an NF-e access key

The invoice will appear here: what it is, whether it is valid and why.

Invoice

Document Invoice number Issue date Due date Delivery date Currency Buyer reference / Leitweg-ID

German public buyers give a Leitweg-ID; companies — any reference they ask for.

Order number Corrects invoice no.

Seller

Name Street and number Post code City Country (ISO code) VAT ID Tax number Contact person Phone E-mail Electronic address Address scheme

Buyer

Name Street and number Post code City Country (ISO code) VAT ID Contact person Phone E-mail Electronic address Address scheme

Payment

Payment means IBAN BIC Account holder Payment terms Payment reference

XRechnung also requires: buyer reference, seller contact person, phone and e-mail, both electronic addresses and payment details.

Lines

Check with the official rules

How the receiver will see it

The tool prepares and checks files. It does not send them to Peppol, the French portal, SEFAZ, ZATCA or an EDI operator, does not create NF-e and does not sign.

Schemas: OASIS UBL 2.1, UN/CEFACT CII D16B. Rules: CEN EN 16931 Schematron (EUPL-1.2), KoSIT XRechnung 3.0.2 (Apache-2.0), OpenPeppol BIS Billing 3.0.20. Engines: SaxonJS 2.7 © Saxonica Ltd., libxml2 (MIT).

What it does

One drop zone for every format

UBL and CII XML, PDF/A-3 with the XML inside, Peppol BIS, NF-e with protocol and events, NFC-e, ZATCA XML or a photo of its QR, UPD 5.03 with its .sig, ZIP archives and .eml files — the type is detected from the bytes.

The official check, explained

The XML schema (UBL 2.1, CII D16B), then the EN 16931, XRechnung 3.0.2 and Peppol BIS 3.0.20 rules, in the order the official validator runs them; on 1010 test files the verdict matched the German reference validator on every one.

A straight verdict

MINIMUM and BASIC WL are not invoices, a plain PDF is not an e-invoice, an NF-e without an authorization protocol is not valid, UPD 5.01 is outdated — said in one sentence with the reason.

DANFE in three layouts

A4 portrait with the access key as CODE-128C, the 80 mm NFC-e receipt with its QR, and the 100 × 150 mm label; the XML signature and the access key check digit are verified.

Batches for accountants

Drop a month of invoices: a list with verdicts, every invoice as a PDF in one ZIP, a CSV of totals and a CSV of lines for your accounting software.

Issue and self-check

XRechnung in UBL or CII, ZUGFeRD/Factur-X EN 16931 as PDF/A-3, Peppol BIS UBL and a ZATCA phase-1 QR — validated live with the same rules before you download.

Questions

An XRechnung opens as code in my browser — how do I read it?

An XRechnung has no picture of its own: it is only data. Drop the .xml here and the tool lays it out as an invoice — parties, lines, VAT breakdown, totals, bank details — and can turn that layout into a PDF.

Is the PDF made here a valid copy for my archive?

The legally relevant original of an XRechnung or ZUGFeRD invoice is the XML. The PDF from this tool is a readable copy with that original XML attached inside it, so the two travel together; keep the XML (or this PDF with it) as the record.

Why does it say a ZUGFeRD MINIMUM or BASIC WL file is not an invoice?

These two profiles carry no invoice lines. In Germany the Federal Ministry of Finance does not accept them as invoices under § 14 UStG; they only help a buyer’s bookkeeping. Ask the sender for the EN 16931 (COMFORT), BASIC, EXTENDED or XRECHNUNG profile.

Why is my DANFE marked “NÃO AUTORIZADA” or “SEM VALOR FISCAL”?

A DANFE is only valid for an NF-e that SEFAZ authorized: the file must be an nfeProc with protNFe and status 100 or 150. An NFe without the protocol is a draft or a rejected note, and a note issued in the test environment (tpAmb 2) has no fiscal value.

Can I download an NF-e XML by its access key here?

No. Since 2020 SEFAZ gives the XML by access key only to a party with a digital certificate (A1 or A3) of the issuer or recipient. Here you can check an access key — its check digit and what it encodes — and open the XML you already have.

Does the check match the official validator?

It runs what the German KoSIT validator runs, in the same order: first the XML schema (UBL 2.1 or CII D16B), then the rule files (EN 16931 1.3.16, XRechnung 3.0.2) or the Peppol BIS 3.0.20 rules. We compared the two on 1010 files — 202 official test files (the KoSIT XRechnung suite, the CEN and Peppol examples, the ZUGFeRD corpus) and 808 deliberately broken variants of them: the verdict matched on every file, and where the rules ran, the failed rules matched one for one. Not covered: the CIUS of other countries outside Peppol (the answer names them) and the separate Factur-X BASIC rule file.

Can I send the invoice to Peppol, the French portal or ZATCA from here?

No. The tool prepares and checks the file; sending goes through a Peppol access point, an accredited platform (PA) in France or a ZATCA-registered solution in Saudi Arabia. It does not create NF-e and does not sign anything.

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Who is this tool for?

📋 Productivity

Published 21 Oct 2026 Updated 23 Oct 2026 Author: The Supreme

E-invoice viewer and validator: XRechnung, ZUGFeRD, Peppol, DANFE

How to open and check an e-invoice

Open, check and issue electronic invoices

What it does

Questions

An XRechnung opens as code in my browser — how do I read it?

Is the PDF made here a valid copy for my archive?

Why does it say a ZUGFeRD MINIMUM or BASIC WL file is not an invoice?

Why is my DANFE marked “NÃO AUTORIZADA” or “SEM VALOR FISCAL”?

Can I download an NF-e XML by its access key here?

Does the check match the official validator?

Can I send the invoice to Peppol, the French portal or ZATCA from here?

Experts on this topic

How do you rate this tool?

Comments

E-invoice viewer and validator: XRechnung, ZUGFeRD, Peppol, DANFE

How to open and check an e-invoice

Open, check and issue electronic invoices

What it does

Questions

An XRechnung opens as code in my browser — how do I read it?

Is the PDF made here a valid copy for my archive?

Why does it say a ZUGFeRD MINIMUM or BASIC WL file is not an invoice?

Why is my DANFE marked “NÃO AUTORIZADA” or “SEM VALOR FISCAL”?

Can I download an NF-e XML by its access key here?

Does the check match the official validator?

Can I send the invoice to Peppol, the French portal or ZATCA from here?

Experts on this topic

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How do you rate this tool?

Comments