Crypto Tools
Validate Bitcoin and Ethereum addresses, convert between crypto units (satoshi, gwei, wei), check BIP39 seed phrases, calculate staking rewards, and track DCA strategies. Every tool runs in your browser — no address, seed phrase, or transaction data ever leaves your device.
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Frequently Asked Questions
- Is it safe to enter a seed phrase or private key into a browser tool?
- Only if the tool is verifiably client-side. Open DevTools → Network tab before entering any sensitive crypto data and confirm zero outbound requests. brevio crypto tools make no network requests during processing. For seed phrase validation, additionally disconnect from the internet before entering.
- Do these tools store any wallet addresses or transaction data?
- No. brevio crypto tools run in your browser and store nothing. No data is sent to a server, logged, or persisted between sessions.
- Are conversion calculations exact for large numbers?
- Yes. Ethereum unit conversions use BigInt arithmetic to handle the full range of wei values (up to 10^77) without floating-point rounding errors. Bitcoin and Solana conversions use exact integer arithmetic.
- Do these tools provide financial advice?
- No. Calculators (DCA, staking rewards, APY) illustrate mechanics and estimates — they are not financial advice. Actual returns depend on market conditions, protocol parameters, and tax treatment. Consult a qualified financial professional.