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All tools(17)
Ethereum Address Validator
Validate ETH addresses with full EIP-55 checksum verification — 100% in your browser.
APY ↔ APR Converter
Convert Annual Percentage Rate to Annual Percentage Yield and back — DeFi-grade precision.
DCA Calculator
Simulate dollar-cost averaging into any asset — see total invested, units held, and average cost.
Satoshi ↔ BTC Converter
Convert satoshis to bitcoin and back with millisecond precision — the sats standard.
ETH Unit Converter
Convert between Wei, Gwei, Finney and Ether — gas, balances and DeFi in one place.
Bitcoin Address Validator
Validate BTC addresses — Legacy (P2PKH), SegWit (P2SH), and Bech32 (Native SegWit + Taproot).
Staking Rewards Calculator
Project staking yield over time — daily, weekly, monthly compounding with restake modeling.
Crypto Tax Calculator
Compute capital gains P&L on crypto trades — FIFO, LIFO and HIFO methods.
Portfolio Rebalancer
Compute exact buys and sells to reach your target asset allocation.
Crypto Payment QR Generator
Generate a payment QR for BTC, ETH, SOL, LTC — copy-paste into any wallet.
Crypto Denomination Reference
Lookup table for BTC, ETH, SOL units — sats, gwei, lamports and more.
BIP39 Seed Phrase Validator
Check recovery phrases word-by-word against the BIP39 wordlist and verify the checksum.
