ChainFile provides automated cryptographic verification of your on-chain holdings. Generate IRS-compliant Form 8949 and Schedule D directly from your wallet — accepted for the 2026 tax season.
Compatible with all major wallets
Four steps — your private key never leaves your wallet.
Link any Web3 wallet. We support MetaMask, Trust Wallet, Coinbase Wallet, and WalletConnect.
Sign a single cryptographic attestation. No gas fees — the signature is generated off-chain.
Your transaction history is analyzed. Form 8949 and Schedule D are generated automatically.
Download your completed forms. Compliance status is confirmed and documented.
Comprehensive analysis across 50+ chains and DeFi protocols.
Full trade history across Ethereum, BSC, Solana, Polygon, Arbitrum, Optimism, and 50+ additional chains. Every swap, transfer, and contract interaction is indexed, classified, and valued at the time of the transaction.
FIFO, LIFO, and specific identification cost basis methods — realized and unrealized positions.
LP rewards, staking yields, airdrops, and lending interest — classified under IRS Publication 544.
Cryptographic attestation under IRC §6045 — verifiable on-chain without exposing your private key.
IRS-compliant PDF with all dispositions, acquisition dates, cost basis, and gain/loss per lot.
AES-256-GCM for all data in transit. Wallet private keys are never transmitted or stored.
Select based on your portfolio value. All tiers include Form 8949 generation.
Select your wallet provider to begin verification. Your private key is never shared.