Formats · Invoice preflight checker
Identify common XML, JSON and national electronic invoice signatures.
Open toolPrimary formatOnline Számla
Formats and networksNAV XML
Official authorityNemzeti Adó- és Vámhivatal
Last reviewed2026-08-02
Working tools
Hungary
Explore electronic invoicing formats, identifiers, rules, deadlines and free technical tools for Hungary.
NAV XML
Implementation
Online Számla
1
Formats and networksNAV XML
2
IdentifiersInvoice number
3
What the tool checksInvoice preflight checker · Timeline
4
Official sourcesNemzeti Adó- és Vámhivatal
Invoice viewer
Read supplier, buyer, dates, currency, totals and line items.
Open toolInvoice preflight checker
Check parseability, core fields, identifiers and arithmetic before submission.
Open toolArithmetic checker
Reconcile net, tax, gross, paid and payable amounts.
Open toolIdentifier checker
Check the structure of VAT, GST and national business identifiers.
Open toolInvoice viewer ⇄ Invoice viewer
Compare two files and highlight changed fields and totals.
Open toolPrivacy · Invoice viewer
Replace common names, addresses, tax IDs, emails and bank details locally.
Open toolInvoice viewer · Print view
Create a clean browser print view from structured invoice data.
Open toolInvoice preflight checker ×
Inspect multiple structured invoice files and export a summary.
Open toolInvoice preflight checker · ID
Find exact and likely duplicates using file hashes and invoice keys.
Open toolFormats · XML / JSON
Search field names, values and document paths.
Open toolReadiness wizard
Find the likely format, channel and checks for a transaction.
Open toolRequirements
Online Számla · NAV XML
- Invoice number
- Issue date · Due date
- Seller · Seller identifier
- Buyer · Buyer identifier
- Currency
- Net amount · Tax · Amount payable
Implementation
Current statusOnline Számla
Formats and networksNAV XML
Delivery modelTax reporting, certified billing software or structured exchange depending on transaction.
Mandate scopeElectronic invoice or transaction-reporting rules with country-specific technical requirements.
Country-specific review points
These checks reflect the documented workflow and technical profile for Hungary. They are reviewed separately from the shared file parser.
- Online Számla format or profile signals
- Local tax/business identifier structure
- Core invoice fields and arithmetic consistency