Graphic Design Invoice Generator
Bill design work with concepts, revisions, artwork and usage rights itemised.
Invoice XML Validator
Find the exact line and column where invoice XML breaks, then check what it says.
Or drop an XML file here
Try a sample
Quick Tool Overview
The Invoice XML Validator finds the exact line and column where invoice XML stops being well-formed, explains the fault, and then checks what the XML says — EN 16931 rules for UBL and CII, recomputed totals for plain invoice XML, a structure report for anything else.
- What it does
- Validates invoice XML files
- You give it
- Any XML invoice
- You get back
- Syntax faults located and invoice checks
- Best for
- Hand-edited and exported XML
About the Invoice XML Validator
Most rejected XML invoices are not wrong about VAT. They are not XML: an ampersand in a company name written as a bare &, a tag closed in the wrong order after a hand edit, a namespace prefix nobody declared, a second root element pasted onto the end. Parsers report these badly, and a receiving system often just says the file is invalid.
This checks invoice XML in two layers. First the syntax, with the exact line and column of the first fault, a plain explanation and the offending lines shown with a marker. Then, once the XML is well-formed, what kind of invoice it is: a UBL or CII e-invoice is checked against the EN 16931 business rules; the category’s plain invoice XML has its stated totals recomputed from its lines; any other XML gets a structure report of its root, namespaces, depth and elements.
The file is read by a strict parser in your browser, which behaves the same in every browser and never uploads the invoice.
Key features of the Invoice XML Validator
Strict parser
The same result in every browser.
Fault excerpt
The broken lines shown with a marker.
Namespace checks
Undeclared prefixes and wrong namespaces caught.
Invoice-aware
Business rules or recomputed totals once it parses.
Private
Nothing leaves your browser.
How to use the Invoice XML Validator
-
1
Paste or drop the XML
Any size; it is parsed locally.
-
2
Fix syntax errors first
The line and column are marked, with what the parser expected.
-
3
Read the invoice checks
Business rules for e-invoices, recomputed totals for plain XML.
-
4
Check the structure
Root element, namespaces and element counts.
Frequently asked questions
That the file follows XML’s own grammar: one root element, every tag closed in order, attribute values quoted, special characters escaped, namespace prefixes declared. A file that is not well-formed cannot be read at all.
No. Valid means it also follows a schema and its rules — the right elements, in the right order, with consistent figures. This checks well-formedness fully and the invoice rules for UBL and CII.
Because & starts an entity in XML. A company called Smith & Sons must be written Smith & Sons inside the file.
Not with a full XSD engine, which browsers do not include. It checks well-formedness, namespaces and the business rules, which is where real invoice files fail.
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