# Bitcoin & Crypto Tools — Wallets, Fees & Converters > Browse crypto tools for local Bitcoin and multi-coin wallet creation, transaction inspection, fee calculations, public addresses, network data and encoding. 40 core tools: local Rust/WASM calculations, local wallet utilities and public mainnet lookup APIs. Multi-coin generation supports Bitcoin, Ethereum, Litecoin and Dogecoin with the documented network limits. Brain wallets are educational only and unsafe for real funds. [EVM wallet generator](https://qbitcoin.live/tools/evm-wallet-generator/index.md) reuses Ethereum account creation and explains network boundaries. ## Wallets & keys - [Bitcoin Wallet Generator & Creator](https://qbitcoin.live/tools/bitcoin-wallet-generator/index.md): Create a Bitcoin wallet locally: generate a BIP39 seed phrase and legacy, SegWit or Taproot address on your chosen network. - [Ethereum Wallet Generator & Creator](https://qbitcoin.live/tools/ethereum-wallet-generator/index.md): Create an Ethereum wallet locally with a BIP39 seed phrase and EIP55 address. Keys stay on your device; Ethereum mainnet account derivation. - [Litecoin Wallet Generator](https://qbitcoin.live/tools/litecoin-wallet-generator/index.md): Generate a Litecoin mainnet mnemonic and legacy address locally. - [Dogecoin Wallet Generator](https://qbitcoin.live/tools/dogecoin-wallet-generator/index.md): Generate a Dogecoin mainnet mnemonic and legacy address locally. - [Multi-Coin Wallet Generator & Creator](https://qbitcoin.live/tools/multi-coin-wallet-generator/index.md): Create a Bitcoin, Ethereum, Litecoin or Dogecoin mainnet wallet locally. Generate one wallet for your selected coin, with a private seed backup. - [BIP39 Seed Phrase Generator](https://qbitcoin.live/tools/bip39-seed-phrase-generator/index.md): Generate an English BIP39 mnemonic using cryptographic randomness locally. - [BIP39 Seed Phrase Validator](https://qbitcoin.live/tools/bip39-seed-phrase-validator/index.md): Understand mnemonic word-list and checksum validation. - [Mnemonic to Seed Converter](https://qbitcoin.live/tools/mnemonic-to-seed/index.md): Learn the distinction between a mnemonic phrase and its derived seed. - [HD Wallet Derivation Explorer](https://qbitcoin.live/tools/hd-wallet-derivation/index.md): Derive a bounded set of Bitcoin addresses locally from a seed and path. - [Private Key to Bitcoin Address](https://qbitcoin.live/tools/private-key-to-address/index.md): Understand the relationship between a private key and Bitcoin addresses. - [WIF Converter](https://qbitcoin.live/tools/wif-converter/index.md): An overview of Bitcoin private-key export encoding. - [XPUB / XPRV Decoder](https://qbitcoin.live/tools/xpub-xprv-decoder/index.md): Understand extended-key metadata and the risks of sharing it. - [Bitcoin Paper Wallet Generator](https://qbitcoin.live/tools/bitcoin-paper-wallet-generator/index.md): Learn the limitations of printing a Bitcoin key backup. - [Brain Wallets: Security & Risks](https://qbitcoin.live/tools/brain-wallet-generator/index.md): Why memorable phrases are unsafe for protecting real Bitcoin funds. ## Transactions & fees - [Raw Transaction Decoder](https://qbitcoin.live/tools/bitcoin-transaction-decoder/index.md): Learn what a Bitcoin transaction decoder can reveal without broadcasting. - [Raw Transaction Broadcaster](https://qbitcoin.live/tools/bitcoin-transaction-broadcast/index.md): Understand the explicit review step before broadcasting a signed transaction. - [TXID Calculator](https://qbitcoin.live/tools/bitcoin-txid-calculator/index.md): Understand transaction identifiers and their distinction from witness identifiers. - [Bitcoin Fee Estimator](https://qbitcoin.live/tools/bitcoin-fee-estimator/index.md): Calculate Bitcoin transaction fees from virtual size and a fee rate in sat/vB. Review the resulting fee in satoshis. - [Transaction Size & Weight Calculator](https://qbitcoin.live/tools/bitcoin-transaction-size-calculator/index.md): Understand serialized bytes, transaction weight and virtual bytes. - [RBF Fee Bump Calculator](https://qbitcoin.live/tools/rbf-calculator/index.md): Learn the review process for increasing a replacement transaction fee. - [CPFP Fee Calculator](https://qbitcoin.live/tools/cpfp-calculator/index.md): Learn how a child transaction can affect a transaction package’s fee rate. - [PSBT Decoder](https://qbitcoin.live/tools/psbt-decoder/index.md): Inspect the purpose of a partially signed Bitcoin transaction. - [PSBT Combiner & Finalizer](https://qbitcoin.live/tools/psbt-combine-finalize/index.md): Understand combining signatures and preparing a transaction for extraction. - [Bitcoin Script Decoder](https://qbitcoin.live/tools/bitcoin-script-decoder/index.md): Read the role of script bytes and opcodes in Bitcoin spending conditions. - [Bitcoin Message Sign & Verify](https://qbitcoin.live/tools/bitcoin-message-sign-verify/index.md): Understand the difference between message signing and transaction authorization. ## Addresses & payments - [Bitcoin Address Generator](https://qbitcoin.live/tools/bitcoin-address-generator/index.md): Generate a Bitcoin receiving address from a public key. Choose legacy, SegWit or Taproot and validate the intended network. - [UTXO Checker](https://qbitcoin.live/tools/bitcoin-utxo-checker/index.md): Check a Bitcoin mainnet transaction outpoint for an unspent output. - [Bitcoin Payment URI Generator](https://qbitcoin.live/tools/bitcoin-uri-generator/index.md): Learn how a Bitcoin payment request can include an address and amount. - [Bitcoin QR Payment Generator](https://qbitcoin.live/tools/bitcoin-qr-code-generator/index.md): Understand QR codes for sharing a Bitcoin payment request. - [Bitcoin Address Validator](https://qbitcoin.live/tools/bitcoin-address-validator/index.md): Learn what address-format validation can and cannot tell you. - [Bitcoin Address Balance Checker](https://qbitcoin.live/tools/bitcoin-balance-checker/index.md): Understand a public address balance and its privacy implications. ## Network & mining - [Transaction Confirmation Estimator](https://qbitcoin.live/tools/bitcoin-confirmation-estimator/index.md): Learn why confirmation-time estimates remain uncertain. - [Bitcoin Mempool Dashboard](https://qbitcoin.live/tools/bitcoin-mempool/index.md): Understand pending transactions, fee conditions and snapshot freshness. - [Difficulty Adjustment Countdown](https://qbitcoin.live/tools/bitcoin-difficulty-adjustment/index.md): Learn how a countdown estimates the next Bitcoin difficulty adjustment. - [Bitcoin Halving Countdown](https://qbitcoin.live/tools/bitcoin-halving-countdown/index.md): Understand a block-based estimate for Bitcoin’s next subsidy halving. - [Bitcoin Block Reward Calculator](https://qbitcoin.live/tools/bitcoin-block-reward-calculator/index.md): Learn the difference between block subsidy and total miner reward. ## Converters & encoding - [BTC to Satoshi Converter](https://qbitcoin.live/tools/btc-satoshi-converter/index.md): Understand Bitcoin units: one BTC equals 100,000,000 satoshis. - [BTC to Fiat Calculator](https://qbitcoin.live/tools/bitcoin-price-calculator/index.md): Convert a BTC amount to fiat using a price you supply. - [Bech32 / Bech32m Encoder Decoder](https://qbitcoin.live/tools/bech32-decoder/index.md): Understand checksummed encoding and Bitcoin witness address context. - [Base58Check Encoder Decoder](https://qbitcoin.live/tools/base58check-decoder/index.md): Understand Base58Check payloads, version bytes and checksums. 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