Which free Peppol validator should you use?

Five free services check a Peppol BIS Billing 3.0 invoice: the European Commission's eInvoice Validator, Peppol Validator, e-invoice.be's validator, B2Brouter's validator and Klarbon. All apply the official EN 16931 rules; four also apply the Peppol BIS rules. They differ in the rule versions they state, batch uploads, accounts, explanations, and what happens to your file.

Every fact about another service comes from its own page, read on 7 November 2026. Where a page does not say something, the table says "not stated", not a guess. ecosio's validator page could not be loaded on that date, so it is not described here.

How do the five validators compare?

"Not stated" means the provider's page does not say. Klarbon's facts come from its own Peppol validator page and its shared limits; its checking is in beta.

When is the European Commission's validator the right choice?

When you want the public-sector reference for the European standard. The eInvoice Validator is a service of the European Commission's DG DIGIT, part of the Interoperability Test Bed, and validates against the requirements of EN 16931; on 7 November 2026 it offered UBL Invoice, UBL Credit Note and CII Invoice at release 1.3.17, with REST and SOAP APIs (ITB). Its page lists the EN 16931 validation types; for Peppol BIS rules, use a tool that states them.

When is Peppol Validator the right choice?

When you check many files at once or want to share a result with a colleague. It states its rule versions, including Peppol BIS Billing 3.0.20, offers batch upload, shareable result links and no rate limits, and needs no signup (Peppol Validator). It also lists clearly what the official rules do not check, such as whether a VAT ID or Peppol ID is registered.

When is e-invoice.be the right choice?

When you want a quick check with an explicit storage statement. e-invoice.be checks UBL 2.1 and CII against EN 16931 and the Peppol BIS 3.0 rules, free and without an account, takes files of up to 5 MB, and says the file is processed in memory and never stored (e-invoice.be). It also offers a Peppol registration check for any company.

When is B2Brouter the right choice?

When you may later send and receive e-invoices through the same provider. B2Brouter's free validator checks structure, syntax and business rules, with XSD and Schematron, across UBL, CII, Peppol BIS and PINT and several European formats, and verifies electronic signatures where applicable (B2Brouter). B2Brouter is a certified Peppol access point; you can start on its platform at no cost, with Peppol features according to the plan.

When is Klarbon the right choice?

When you want each error explained in plain words, in your language, and a way to correct the file. The Peppol validator applies EN 16931 and the Peppol BIS Billing 3.0 rules, shows the rule code with guidance where available, and is free within a daily limit, which a free account raises (see pricing); the checking is in beta. Fix corrects the invoice in a form and returns a validated file; the download costs credits, charged only when the file passes. Klarbon checks the file, not the network: it is not an access point and does not look up participants.

What a passed check does not prove

A valid result means the file passed the official rules at a given version. It does not prove that the VAT number, the Peppol ID or the bank details are real, or that your customer can receive on Peppol. Look up a participant with the Peppol lookup or in the Peppol Directory, and check the data against your records. For how Peppol relates to UBL, see Peppol or UBL?.

Related

• Validate a Peppol BIS invoice
• Validate an e-invoice
• Free e-invoice viewers compared