ZUGFeRD Validator — Validate, Fix & Download Free

Validate your ZUGFeRD/Factur-X invoices against EN 16931 and all profiles. Structural errors are auto-fixed — free, no account required.

CII D16BEN 16931Factur-X 1.0PDF/A-3

MinimumBasic WLBasicEN 16931 (Comfort)Extended

Initializing Engine

Loading validation rules and remediation pipeline…

150+ rules5 formatsKoSIT daemon

What We Check

EN 16931 Core Rules

Mandatory fields (BR-01 through BR-65)
Tax calculation and rounding
Code list validation (currency, country, unit codes)
CII namespace and document structure

ZUGFeRD/Factur-X Profiles

Profile detection (Minimum through Extended)
Profile-specific mandatory fields
DATEV import compatibility
Extended profile XRechnung compliance

PDF/A Embedding

PDF/A-3b conformance (ICC profile, embedded fonts)
Factur-x.xml attachment extraction
Profile match between PDF and XML
Metadata and XMP validation

How It Works

Step 1

Upload PDF or XML

Upload your ZUGFeRD PDF or extracted CII XML. Your file never leaves your browser.

Step 2

Engine validates

Over 150 rules are checked: EN 16931, profile requirements, PDF/A-3 structure. Fixable errors are auto-repaired.

Step 3

Download compliant invoice

Download the fixed file or generate an evidence pack for your compliance documentation.

Common ZUGFeRD Errors

FORMAT-002PDF/A-3 conformance failure (missing ICC profile)FORMAT-004Profile mismatch between PDF and XML CII-SR-001Invalid CII namespace declaration CII-SR-002Missing ExchangedDocumentContext BR-DE-01Missing Leitweg-ID (Extended profile B2G)

Browse all error guides

Frequently Asked Questions

What is the difference between ZUGFeRD and Factur-X?+

Technically identical — same specification, same file format. ZUGFeRD is the DACH region name (Germany, Austria, Switzerland), Factur-X is the French variant. Files are fully interchangeable.

Which profiles are supported?+

All five ZUGFeRD profiles: Minimum, Basic WL, Basic, EN 16931 (Comfort), and Extended. The Extended profile is XRechnung-compatible for German B2G submissions.

Is PDF/A-3 structure validated?+

Yes. We check ICC color profile, embedded fonts, factur-x.xml attachment, and metadata. Many PDF generators create standard PDFs instead of PDF/A-3 — our validator catches this immediately.

Is my data secure?+

Yes. Validation runs entirely in your browser — your file is not uploaded to our servers. For auto-repair, the file is transmitted encrypted and deleted immediately after processing.

Is there an API for automated validation?+

Yes. Our REST API validates and fixes ZUGFeRD files programmatically. Structured results with error codes, XPath locations, and automatic corrections. Ideal for DATEV, SAP, and Lexware integration.