KeySense
Crypto key math is confusing. KeySense makes it visible: derive, inspect, and export keys across multiple chains and curves, mine vanity EVM addresses, and see exactly how a passphrase turns into a wallet.
It runs entirely in your browser, with zero network requests, so it works fully air-gapped on an offline device.
What it is
Most wallets hide how a seed phrase becomes an address on Ethereum, Bitcoin, Solana, and Tron. Different wallets also use different derivation paths for the same coin, so restoring the same seed phrase into a new wallet can show a $0.00 balance even though the funds are still there, just at a different path.
KeySense derives keys across secp256k1 and Ed25519, and handles Bitcoin's script types (Legacy, Wrapped SegWit, Native SegWit, Taproot), EVM chains, Tron, and Solana's SLIP-0010 curve side by side, so a path mismatch is visible instead of hidden.
Everything runs client-side. No seed, key, or passphrase is ever sent over the network, so it can run fully air-gapped on an offline machine.
What you get
- Derivation engine
- Multi-chain, multi-curve derivation across Bitcoin, Ethereum and EVM chains, Solana, Tron, Litecoin, and Dogecoin (secp256k1 and Ed25519, full SLIP-0044 coin registry)
- Developer mode
- Extended key engine (XPUB/XPRV) at account root and leaf nodes, relative child derivation from a pasted xpub/xprv, a side-by-side Bitcoin UTXO matrix (Legacy, Nested SegWit, Native SegWit), and batch generation of up to 50 sequential addresses
- Vanity address miner
- Offline EVM address mining by prefix, suffix, or contains pattern, entirely in-browser, with a live hash-speed counter and difficulty estimate
- Brain wallet lab
- SHA-256 entropy hashing from a passphrase into a 24-word BIP39 mnemonic, with a live entropy-strength meter and built-in warnings about dictionary and rainbow-table attacks
- Path reference guide
- Interactive breakdown of the m / purpose' / coin_type' / account' / change / index hierarchy, hardened vs. normal keys, and the SLIP-0044 coin registry
- Execution
- One hundred percent client-side. Zero network requests, no backend, no tracking. Can be saved as a single HTML file and run on an offline machine
Common questions
Does KeySense ever send my seed phrase or private keys anywhere?
No. Everything runs client-side in your browser. There are zero network requests, so it works fully air-gapped on an offline device.
Why did my wallet show a $0.00 balance after I restored my seed phrase?
Different wallets often use different derivation paths for the same coin, for example m/44'/60'/0'/0/0 versus m/44'/60'/0'/0. A path mismatch shows an empty wallet even though the funds are still there, at a different path. KeySense lets you check a seed against multiple paths at once.
Is KeySense a wallet?
No. It does not hold funds and does not connect to any network or exchange. It is a derivation, address-mining, and education workbench.
Which chains and curves does it support?
secp256k1 for Bitcoin, Ethereum and EVM chains, Litecoin, Dogecoin, and Tron. Ed25519 via SLIP-0010 for Solana.
Is the code open source?
Yes. The source is on GitHub.
KeySense is a derivation, address-mining, and education tool. It is not a wallet: it does not hold funds and does not connect to any network or exchange. Brain wallets are shown for education only; use standard BIP39 entropy for real funds. Never enter a seed you use for real funds into a device you do not fully control.