Local toolkit
Payment tools that keep sensitive work in your browser.
Use test data and synthetic payloads. PaymentKits Phase 1 does not host a webhook inbox, connect to a PSP, or retain your input.
Common Tools · Signature and Security
API Signature
Generate and verify HMAC signatures.Common Tools · API Collections
OpenAPI / Postman
Import API definitions and export request collections.Common Tools · Webhook
Webhook Inbox
Receive and inspect callback requests in a local lab.Common Tools · Webhook
Webhook Signature Verifier
Verify incoming webhook signatures against PSP-specific schemes.Common Tools · Currency
Currency & Minor Units
Convert between major units and ISO 4217 minor units without float drift.Common Tools · Signature and Security
JWT / JWS Inspector
Decode JWT header/payload and verify HS/RS/ES signatures.Common Tools · Encoding
Bytes / Encoding Converter
Convert between UTF-8, Base64, Base64URL, and Hex.Card · Card
Luhn / Brand / Mask
Validate test PAN, detect brand, mask safely.Card · Card
ISO8583 BitMap
Mark present fields from a hexadecimal bitmap.Card · Card
ISO8583 Builder
Build profile-aware message skeletons and bitmaps.Card · 3DS Authentication
EMV 3DS Viewer
Inspect AReq/ARes/CReq/CRes/RReq/RRes messages.Card · Card
EMV TLV Parser
Inspect DE55 and common EMV tags.Card · 3DS Authentication
CAVV Decoder
Decode Base64 or hex CAVV bytes.Card · 3DS Authentication
AAV Decoder
Decode Base64 or hex AAV bytes.Card · 3DS Authentication
CAVV Calculator
Generate deterministic sandbox CAVV fixtures.Card · 3DS Authentication
SPA AAV Calculator
Generate deterministic sandbox SPA AAV fixtures.Card · Wallet Tokens
Apple Pay / Google Pay Token
Parse wallet payment tokens and inspect encrypted payment data.Wallet / QR · Wallet / QR
QR Generator / Parser
Build QR payloads, images, and deep links.Bank Transfer · Bank Transfer
Mock Bank Transfer
Generate a redirect payment page and return payloads.Bank Transfer · Bank Transfer
IBAN Validator & Parser
Validate ISO 13616 IBAN checksums and structure.Reference Data · Bank Identifiers
BIC / SWIFT Validator
Validate ISO 9362 BIC/SWIFT codes and inspect bank identifiers.Reference Data · Merchant Codes
MCC Lookup
Look up Merchant Category Codes (MCC) and high-level categories.Reference Data · ISO 8583
ISO 8583 Response Codes
Look up ISO 8583 authorization response codes and their meanings.Reference Data · Validation
Check Digit Calculator
Compute and validate check digits (Luhn, mod-10/11/97, Damm, Verhoeff).Compare · Compare