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Terms of Use

Effective as of August 2026

Facturx Validator is a free tool: there is no paid tier and no billing. These Terms of Use govern the entire service, with no separate commercial terms.

Article 1 — Purpose

These Terms of Use define the conditions under which Kortilabs provides the "Facturx Validator" service: a free online tool and REST API for checking the compliance of electronic invoices against the EN 16931 standard, for the formats actually implemented (Factur-X/CII and UBL 2.1).

Article 2 — Access to the service

Access to the web tool requires no registration. Access to the REST API is subject to a rate limit of 60 requests per minute per IP address, with no authentication required at this stage.

Article 3 — Scope of validation and limits

The service only validates Factur-X/CII and UBL 2.1 documents against the EN 16931 rules implemented by the validation engine. Formats identified as "roadmap" (Peppol BIS Billing 3.0, FatturaPA, Verifactu) are not implemented: any submission of these formats returns an explicit HTTP 501 response, never a simulated compliance result.

A "compliant" result reflects only the rules implemented by this engine at the time of the request. It does not constitute legal, tax or accounting advice, and does not replace the validation carried out by an official platform (e.g. Chorus Pro, a PDP/PPF, or any partner validation portal).

Article 4 — No data retention

Files and XML content submitted for validation are processed entirely in memory and are never persisted, stored, or logged by Kortilabs. See the Privacy Policy for details.

Article 5 — Availability

The service is provided on a best-effort basis, with no uptime guarantee. Kortilabs reserves the right to modify, suspend or discontinue the service at any time, in particular in case of abuse or excessive load.

Article 6 — Liability

Kortilabs cannot be held liable for any direct or indirect damage resulting from the use of the service, including in the event of an incorrect validation result, unavailability, or reliance on the service for a legal or fiscal obligation.

Article 7 — Governing law

These Terms of Use are governed by French law. Any dispute falls under the exclusive jurisdiction of French courts.

Conditions Générales d'Utilisation | Facturx Validator