Free browser tools

Free browser tools for checking a Chinese supplier and its costs

Every tool here runs in your browser on the figures you enter: nothing is sent to a server and nothing queries a registry. Use them to pre-check a supplier's codes and to compare costs, then send the documents to Free Triage (USD 0) before paying a deposit.

Start Free Triage (USD 0) See membership plans

Last reviewed: November 15, 2026.

Browser tools

USCC and SWIFT beneficiary pre-check: check digit, registration type and area code of an 18-character USCC, and the SWIFT country of the payee.
Sourcing fee model calculator: percentage fee with a minimum vs built-in markup vs an open-book flat monthly plan.
LCL vs FCL calculator: revenue tons, LCL total vs one 20-foot container, break-even.
Sample consolidation calculator: separate courier parcels vs one consolidated parcel.
China landed cost and QC calculator: duty, fees, freight assumptions and inspection sampling for one order.
Direct factory vs trading middleman estimator: opaque percentage-fee route vs open-book route.

Machine-readable rules

uscc-rules.json: the GB 32100-2015 character set, check-digit weights and formula, registration type codes, province-level area codes and the ISO 9362 SWIFT code layout used by the pre-check, as static JSON.

What this tool does not do

ChinaPayCheck is not a freight forwarder, customs broker, bank, escrow service or law firm. The calculators run in your browser on the figures you enter; nothing is sent anywhere, and the results are arithmetic, not quotes or advice.

To check the company behind a quote before paying, send the PI and the payment instruction to Free Triage (USD 0). Ongoing sourcing runs on flat monthly workspace plans with no percentage sourcing fee.

Work with a China sourcing agent

ChinaPayCheck is a China sourcing agent for overseas buyers, sold as a monthly membership: the ChinaPayCheck workspace app plus sourcing help from our China desk. We find and verify suppliers, check them before you pay, and follow production, quality control and shipping.

Membership: Free USD 0, Starter USD 20 a month, Growth USD 100 a month, Pro USD 200 a month. Cancel any time; a paid plan runs to the end of the period you paid for.

See membership plans Talk to our team

1. Free Triage First ($0): Send one Chinese supplier, one Proforma Invoice (PI), and one payment instruction via Free Triage. We confirm fit by email before any paid review.

2. Single-Case Pre-Payment Review ($49): Offered only after Free Triage acceptance for one supplier and one payment decision (modeled on Case Reference EXAMPLE-CPC-001).

3. Ongoing Workspace & Sourcing Desk (app.chinapaycheck.com): Monthly memberships—Free $0, Starter $20/mo, Growth $100/mo, Pro $200/mo (cancel anytime; runs to the end of the paid period; supplier goods and shipping are billed separately).

Explicit Evidence Boundary: ChinaPayCheck is an independent buyer-side evidence review, not a law firm, bank, escrow agent, insurer, or recovery agency. We never guarantee supplier safety, account ownership, product quality, shipment, or legal outcomes. Never submit passwords, banking logins, card numbers, or one-time codes.