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Over 20 tools, one ecosystem

A toolbox for e-invoices that hold up.

invoicePress brings together WordPress plugins, Gravity Forms extensions, mapping tools and a free REST API into one continuous toolbox for XRechnung, ZUGFeRD / Factur-X, PEPPOL and KSeF.

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REST API documentation

Real output, not a mockup

Screenshot: (e)Invoice Viewer — parsed invoice with the BT identifiers shown

A screenshot of a real XRechnung CII test file.

This is not a marketing mockup. It is a real screenshot from the demo of the (e)Invoice Viewer for PEPPOL & EN16931 – die offizielle UN/CEFACT-CII-Testrechnung wurde hochgeladen und in wenigen Sekunden dargestellt. Jeder Wert trägt seine EN-16931-Kennung (BT-…) als Beschriftung.

20

plugins & tools

4

tool categories

Four categories

Everything for your e-invoicing workflow

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WordPress plugins

Read, validate and explain invoices directly on your own site.
(e)Invoice Viewer for PEPPOL & EN16931 · Validation Explainer · KoSIT-Validator

Tools Tools

Gravity Forms extensions

Invoice fields in the form, finished PDF/A-3 invoices out of Gravity PDF.
EN16931 fields · SEPA / VAT-ID / EPC-QR field types · ZUGFeRD / Factur-X for Gravity PDF (Mustang Project) · KSeF (Poland)

Brush Brush

Mapping & conversion

Map any source onto EN 16931 — with or without WordPress and Gravity Forms.
EN16931 Mapping Studio (SAP eDocuments XML → EN16931) · Word add-in (tag invoice fields inside a Word document)

Adjust Adjust

Developer Tools

Reference data and checks over a REST API, with no data of your own to maintain.
UN/ECE and UNTDID code lists · Leitweg-ID check (MOD 97-10 checksum) · REST API

Validation Explainer

A rule code becomes a sentence anyone can read.

The Validation Explainer reads a KoSIT validation report, maps every finding to its EN 16931 term and puts the rule, the explanation and the actual and expected values side by side — on your own server, with nothing stored.

See a sample report

Screenshot: Validation Explainer — verdict, validation steps and the first finding BR-CO-10 with its BT identifiers


Validator

The official KoSIT validator — on your own server.

One shortcode puts the KoSIT validator on your page: check XRechnung and ZUGFeRD files against the official scenario configurations, with the authoritative report or a plain-language version. The same tool the reference body itself uses — free of charge.

To the eInvoice Validator

KoSIT validation report: rejected with four errors, each finding with its rule identifier and location in the document


  • GDPR-friendly

    Processed in memory only, never stored, no external services.

  • Measured, not claimed

    Every coverage figure is measured against official sample documents.

  • Modular

    Every tool works on its own — combined they add up to a workflow.

  • International

    XRechnung, ZUGFeRD / Factur-X, PEPPOL and KSeF (Poland).

Ready to assemble your e-invoicing workflow?

Combine WordPress plugins, Gravity Forms fields, mapping tools and the API into a stack of your own.

Explore the products
REST API documentation