Paste an address. Get a Koinly-ready CSV. Nothing is uploaded — the request goes straight from this tab to a public block explorer, and the file is built on your machine.
Does: reads ERC-20 Transfer events and native transactions for one address on one chain, from that chain's public Blockscout instance, and writes Koinly and raw CSV.
Does not: classify your trades, compute cost basis, or handle multiple wallets at once. Native transfers only appear on chains whose explorer exposes them. Anything ambiguous is left unlabelled rather than guessed.
Privacy: there is no backend. Your address is sent only to the explorer you pick, from your own IP, exactly as if you opened that explorer yourself. No analytics, no cookies, no storage.
Speed: up to 20 pages of history per run. Very active wallets will be truncated; use the CLI for full history.
Need many wallets, every chain, and full history? The $19 command-line version does that offline. This page stays free.