eInvoice Viewer Bundle KoSIT Outbound – One-File App Demo

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One-file app · Demo

eInvoice Viewer Bundle KoSIT Outbound as a one-file app.

A one-file app is a single HTML file. You open it in your browser, without installation, without a server and without an account. The invoice you drop into it is read in your browser and is not uploaded.

This demo is the website edition. It checks your own invoices within a daily limit; the sample files included always work.

Start the demo
Sample invoices

What is inside this one-file app

  • eInvoice Viewer for PEPPOL & EN16931

    Shows every e-invoice as a readable document: XRechnung, ZUGFeRD and Factur-X, Peppol BIS, in CII and UBL. Learn more

  • Identifier Check

    Checks identifiers such as VAT ID, IBAN, GLN and Leitweg-ID for structure and check digit and marks errors at the field. Learn more

  • Invoice Monitor

    Keeps incoming and outgoing invoices in lists with due dates; SEPA file and package for your tax adviser. Learn more

  • Technical Details

    Shows cardinality, data type, code list, validation rules and XML path for every field. Learn more

  • Visualizer

    Shows the invoice as a print-ready document in several layouts. Learn more

  • eInvoice Validator for VAMPIRE JS

    Validates the invoice against the official rules with VAMPIRE JS, right in the browser. Learn more

  • eInvoice Validation Explorer for VAMPIRE

    Places every message of the validation report at the field of the invoice it concerns. Learn more

  • eInvoice Validator for KoSIT

    Validates with your official KoSIT validator and shows the report in plain language. Learn more

  • eInvoice Validation Explorer for KoSIT

    Explains every message of the KoSIT report and shows it at the field of the invoice. Learn more

  • Validator Bridge

    A small program on your computer that makes the KoSIT validator or Mustang installed there reachable for the one-file app.


How to try it

  1. Click “Start the demo”. The one-file app opens in a new window.
  2. Drop an e-invoice into it: XML (XRechnung, Peppol, CII, UBL) or a PDF with an embedded invoice (ZUGFeRD, Factur-X). If you have none at hand, use one of our sample invoices.
  3. The app shows the invoice right away and offers the functions of the extensions in the toolbar and in tabs of their own.

To validate with the KoSIT validator or with Mustang, the app needs the Validator Bridge on your computer. Without it, the app shows the invoice and names what is missing for the validation.


Good to know

  • The paid edition has no daily limit and no branding of our website. You get it in the shop as a ZIP with the one-file app and the add-on files.
  • You can pass a one-file app on by e-mail, put it on a USB stick or copy it to a network drive.
  • If you need roles, daily limits and storage, use the WordPress plugins.