EMV QR Hub
EMV QR Hub
EMVCo QR Support Center

Frequently Asked Questions

Short answers about EMV QR Hub, local processing, and EMVCo merchant-presented QR. For tag-level detail, use the Academy articles.

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Explore technical learning resources through EMVCo Academy and understand QR payload structures, TLV encoding, CRC validation, payment interoperability, and EMV QR architecture.

What is EMV QR

TLV Format

CRC Validation

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Technical Disclaimer: EMV QR Hub provides technical tools and educational resources for QR generation, payload validation, interoperability testing, TLV analysis, and EMVCo QR learning. We are not a payment processor, acquiring bank, or financial institution. Always test payment payloads before production usage.

Is EMV QR Hub an official EMVCo product?
No. It is an independent toolkit and academy operated by Pankaj Kalra. EMVCo is a trademark of EMVCo, LLC. We describe compatibility with Merchant-Presented Mode; we are not sponsored or endorsed by EMVCo. Read specifications on emvco.com.
Do you save my payment payloads?
The generator and decoder run in your browser. We do not store those payloads on our servers. Do not paste live secrets into support emails.
What is an EMVCo merchant QR?
A QR whose payload is a TLV string defined by EMVCo for merchant-presented payments: format indicator, point of initiation, merchant account template, MCC, numeric currency, country, name, city, and CRC-16.
Why did a wallet reject a CRC-valid QR?
CRC only proves the string was not corrupted. The wallet still needs a scheme GUID it can pay (PromptPay, SGQR, Bharat QR, UPI rails, etc.). See QR Interoperability.
Should Tag 53 be INR or 356?
356. Tag 53 is ISO 4217 numeric. Alphabetic codes are a common defect. See the ISO 4217 article.
What is the difference between Tag 01 values 11 and 12?
11 is static (reusable). 12 is dynamic (one transaction). Pair 12 with Tag 54 amount. See Point of Initiation.
How do I verify a payload?
Paste it into the QR Decoder, confirm CRC, POI, currency, and merchant name, then scan with a real customer app. Academy samples are not live merchants.
Will you show ads on the generator?
No. AdSense, if approved, is limited to informational pages. Tool canvases stay clear.
Does the site work offline after load?
You need the network to load the app. Generation and decode then run locally. The Android app is built around the same privacy-first idea.

EMV QR Generator

Generate EMVCo-compliant merchant payment payloads with TLV formatting support.

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QR Decoder

Inspect QR payload structures, CRC validation, EMV tags, and TLV formatting.

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About EMV QR Hub

Learn about our vision, EMVCo Academy, technical platform, and QR ecosystem goals.

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Still have questions?

Need help with EMV QR payloads, interoperability testing, TLV validation, CRC verification, QR parsing, or technical platform usage? Reach out to our support team.

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Legal Disclaimer:EMV QR Hub is a technical utility. We do not process financial transactions or store sensitive payment data. Not affiliated with EMVCo, LLC.