We Crypto
& Blockchain

Frequently Asked Questions

Everything you need to know about CryptoQR

General Questions

CryptoQR is a free online tool that generates payment request QR codes for cryptocurrencies. When someone scans your QR code with their crypto wallet, the payment details (your address and amount) are automatically filled in, making it easy to receive payments.
Yes! CryptoQR is completely free for basic usage. You can generate unlimited QR codes for any supported cryptocurrency. We offer a Pro plan with additional features like custom colors and logo embedding for power users.
No account is required! CryptoQR works entirely in your browser. We don't store any of your data - not your wallet addresses, not your generated QR codes, nothing. Your privacy is fully protected.
We fetch real-time cryptocurrency prices from CoinGecko, a trusted price aggregator. When you enter an amount in USD, we convert it to the equivalent crypto amount using the current market rate. Note that crypto prices can be volatile, so the actual value may change between generating the QR and receiving payment.
For maximum wallet compatibility, some cryptocurrencies (like USDT, TRON tokens, and EVM chains) use address-only QR codes. This is because not all wallets support the full payment URI format (like EIP-681 for Ethereum tokens). The address-only format works with virtually all wallets.

Supported Cryptocurrencies

We support 25+ cryptocurrencies across 18 blockchains:

BTC
Bitcoin (BTC) Bitcoin
ETH
Ethereum (ETH) Ethereum
USDT
Tether (USDT) ERC-20, BEP-20, TRC-20
USDC
USD Coin (USDC) ERC-20, SPL
BNB
BNB BNB Smart Chain
SOL
Solana (SOL) Solana
XRP
XRP XRP Ledger
ADA
Cardano (ADA) Cardano
DOGE
Dogecoin (DOGE) Dogecoin
TRX
TRON (TRX) TRON
TON
Toncoin (TON) TON
LTC
Litecoin (LTC) Litecoin

Plus: Polygon, Avalanche, Arbitrum, Optimism, Base, Sui, NEAR, Cosmos, SHIB, PEPE, DAI

Wallet Compatibility

Most major crypto wallets support our QR codes:


  • Bitcoin: BlueWallet, Electrum, Coinbase Wallet, Trust Wallet
  • Ethereum/EVM: MetaMask, Trust Wallet, Coinbase Wallet, Rainbow
  • Solana: Phantom, Solflare, Backpack
  • TON: Tonkeeper, TON Wallet
  • Multi-chain: Trust Wallet, Coinbase Wallet, Exodus, OKX Wallet

Technical Details

We use official blockchain standards:


  • Bitcoin/Litecoin/Doge: BIP-21 - bitcoin:address?amount=X
  • Ethereum: EIP-681 - ethereum:address?value=wei
  • Solana: Solana Pay - solana:address?amount=X
  • Cardano: CIP-13 - web+cardano:address?amount=X
  • TON: ton://transfer/address?amount=nanoton
  • Stablecoins/L2s: Address-only (most compatible)

Our QR codes are optimized for fast, reliable scanning:


  • Size: 280×280 pixels (optimal for most screens)
  • Error Correction: Level M (15% damage tolerance)
  • Format: SVG for display, PNG for download
  • Contrast: Black on white (maximum readability)
  • Quiet Zone: 10px margin for scanner detection

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