Copy only numbers
Use anonymous strings from your own document. This page does not accept names, descriptions, addresses, identifiers, or free text.
Review Production · exact zero tolerance
Check the math
before the paperwork moves.
Recompute anonymous invoice line values and net weights with exact decimal arithmetic.
Browser-onlyBigInt decimal mathNo invoice upload
Anonymous input
Recompute line by line.
Use 1–50 rows. Keep one weight unit throughout; the label is displayed only.
No result yet. Enter anonymous numbers, then run the check.
A visible method
Every number stays inspectable.
Recompute exactly
Products, totals, and differences use coefficient/scale arithmetic with zero tolerance. There is no currency conversion or rounding.
Read the boundary
A mechanical difference or gross/net warning is a prompt to recheck copied values, not a legal or customs conclusion.
Read this beside every result
A math check, not a declaration.
Arithmetic agreement does not prove customs compliance, a correct declared value, origin, classification, or acceptance.
A private-by-default Production for checking copied numbers. It does not receive or create an invoice.
Source notes
Context, not validation.
3 published context notes are available only after an explicit button activation.
- DHL commercial invoice field contextField context only; it does not define a universal destination rule.
- DHL import-document field contextField context only; it does not validate a declaration or destination requirement.
- U.S. CBP commercial-invoice backgroundU.S. background only; not a general arithmetic or destination rule.