KSeFusz.pl
Free KSeF, PEF and UPO invoice visualization to PDF - entirely inside your browser
KSeFusz.pl turns structured invoice XML files from the Polish National e-Invoicing System (KSeF) and the Electronic Invoicing Platform (PEF) into readable PDF documents. The tool also renders Official Receipt Confirmations (UPO). Parsing and PDF generation happen locally in the browser - invoices are never sent to any server. We publish it free of charge, with no sign-up and no limits.
Interface language: Polish
Open the tool
The tool interface is in Polish - KSeF and PEF are Polish e-invoicing systems. The generated PDF document can be rendered in Polish, English, German, French or Ukrainian.
What it does
Support for KSeF schemas: FA(1), FA(2), FA(3) and FA_RR
PEF invoices in the Peppol BIS Billing 3.0 standard (EN 16931) - basic, corrective and public procurement variants
UPO visualization compliant with schema v4_2
Document template in five languages: Polish, English, German, French and Ukrainian
KSeF number and QR code on the generated PDF when the number is part of the file name
A set of sample XML files for testing the tool
Live status of the KSeF environments
When to use it
- • Check how a structured invoice looks to your counterparty before it enters circulation
- • Hand a readable PDF over to your accounting team or bookkeeping office
- • Verify that the XML file produced by your ERP system is correct
- • Archive invoices in a format a human can read, not just a machine
- • Visualize B2G invoices from public procurement delivered through PEF
Privacy
Files never leave your device. The whole process - XML parsing and PDF generation - runs in the browser. You can verify it by disconnecting from the internet after the page loads: the generator still works.
Technologies and competences
Rolling out KSeF in your company?
KSeFusz came out of our own e-invoicing projects. If you need KSeF or PEF integrated with an ERP system, a document workflow or your own application - we will build it for you.
Talk to us about KSeF integration