About

In the high-stakes world of cryptocurrency, a single typo in a wallet address results in the permanent loss of funds. This tool mitigates that risk by generating machine-readable QR Codes that strictly adhere to industry standards like BIP-21 for Bitcoin and EIP-681 for Ethereum.

Unlike generic QR generators, this utility constructs a semantic Uniform Resource Identifier (URI). This means when a user scans the code, their wallet doesn't just see a random string of characters; it recognizes a Payment Request, automatically pre-filling the address, amount, and label fields. This reduces friction and eliminates human error during transactions.

Formulas

The QR Code generation process relies on encoding a URI string that wallets can parse. For Bitcoin, the BIP-21 format is constructed as follows:

URI

scheme:address?params

Where the parameters are concatenated using standard URL encoding:

params = amount=x & label=y & message=z

To ensure scannability when a logo is embedded, we use Reed-Solomon Error Correction Level H (High), which allows for up to 30% data recovery:

Capacity_recoverable = Codewords_total - Codewords_data2

Reference Data

Asset	URI Scheme	Example URI Structure	Validation Regex (Simplified)
Bitcoin (BTC)	bitcoin:	bitcoin:addr?amount=x&label=Rent	^[13][a-km-zA-Z0-9]{25,34}$
Ethereum (ETH)	ethereum:	ethereum:addr?value=wei	^0x[a-fA-F0-9]{40}$
Litecoin (LTC)	litecoin:	litecoin:addr?amount=x	^[LM3][a-km-zA-Z0-9]{26,33}$
Monero (XMR)	monero:	monero:addr?tx_amount=x	^4[0-9AB][1-9A-HJ-NP-Za-km-z]{93}$
Ripple (XRP)	ripple:	ripple:addr?dt=tag	^r[0-9a-zA-Z]{24,34}$
Dogecoin (DOGE)	dogecoin:	dogecoin:addr?amount=x	^D{1}[5-9A-HJ-NP-U]{1}[1-9A-HJ-NP-Za-km-z]{32}$
Bitcoin Cash (BCH)	bitcoincash:	bitcoincash:addr?amount=x	^((bitcoincash:)?(q\|p)[a-z0-9]{41})$
Dash (DASH)	dash:	dash:addr?amount=x	^X[1-9A-HJ-NP-Za-km-z]{33}$
Cardano (ADA)	cardano:	cardano:addr?amount=lovelace	^addr1[a-z0-9]+$
Solana (SOL)	solana:	solana:addr?amount=lamports	^[1-9A-HJ-NP-Za-km-z]{32,44}$

Frequently Asked Questions

Not all wallets support BIP-21 (Bitcoin) or EIP-681 (Ethereum) URI schemes fully. While the QR code contains the data, some lightweight wallets may only parse the address and ignore the query parameters like "amount" or "label". Ensure you are using a compliant wallet.

It can, if done incorrectly. This tool automatically sets the Error Correction Level to "High" (H) when a logo is detected. This redundant data allows the QR scanner to reconstruct the missing part covered by the logo. However, keep the logo size reasonable (usually under 20-25% of the area).

Yes. For ERC-20 tokens (on Ethereum), you generally use the Ethereum address. Some wallets support specific contract interactions via URI, but the safest method for general payments is to generate an Ethereum QR code and specify in the "Message" or "Label" that it is for USDT.

This tool generates STATIC QR codes. The data is encoded directly into the image pattern. If you need to change the destination address or amount later, you must generate a new QR code. There is no central server redirecting the scan.