Fintech Validation Tools
Built for Developers
Validate IBANs, cards, BIC/SWIFT codes, and payment files in one place. Fast, browser-based tools for debugging payment workflows.
ISO 20022 Payments
Generate, validate, and simulate pain.001 and pain.002 payment flows.
Flow Simulator
Simulate the complete payment lifecycle: create a payment, generate pain.001, get a simulated bank response, and view the parsed pain.002 result. Step by step.
Payment Initiation
Generate pain.001 XML from templates or a form, then validate structure, IBAN formats, control sum, and duplicate EndToEndIds.
Payment Status
Parse bank-returned pain.002 files. Extracts group status, per-transaction outcomes, and rejection reason codes with plain-English explanations.
Validation & Lookup
Validate IBANs and BIC/SWIFT codes against financial standards.
IBAN Validator
Validate any IBAN against mod-97 checksum and country-specific length rules. Supports 70+ countries.
BIC / SWIFT Checker
Parse and validate BIC/SWIFT codes. Checks format, country code, dataset lookup, and flags test or passive BICs.
Card Toolkit
Validate card numbers with Luhn + IIN detection, or generate structurally valid test cards for sandbox environments.
Bulk IBAN Validator
Validate a batch of IBANs in one pass. Paste one per line — get a valid/invalid breakdown with error details.
Built for engineers who care about correctness
Payment systems run on standards. FinDevKit implements those standards accurately — IBAN mod-97 checksums, BIC parsing per ISO 9362, pain.001 field validation, and Luhn-correct card generation.
- IBAN mod-97 checksum (ISO 13616)
- BIC/SWIFT structure parsing (ISO 9362)
- pain.001 field validation with CtrlSum cross-check
- Luhn-correct test card generation
- Client-side only — your data never leaves the browser
{
"isValid": true,
"transactionCount": 2,
"controlSum": 1500.00,
"computedSum": 1500.00,
"issues": []
}