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Import Base (Basescan) into Koinly / KoinX

Last updated: 2026-10-10. This page explains how the free CryptoTax converter helps you prepare a Koinly Universal CSV or KoinX Custom File (.xlsx) from Base wallet history via Basescan CSV exports. It is not tax, legal, or financial advice — see Terms.

Steps

1. Export CSV from Basescan — normal / internal / token-transfer CSVs for your public address (e.g. basescan.org/exportData). Never paste a private key or seed.
2. Convert in browser — use the free converter on this site (EVM mode; select your CSV files; runs in your browser only).
3. Download CSV / XLSX — save the Koinly Universal CSV and/or KoinX Custom File (.xlsx).
4. Import in Koinly / KoinX — upload that file in your own account (their import UI).
5. Review — check transactions in Koinly or KoinX; verify everything yourself.

Links

• Free converter (this site) — browser-only, no signup
• Koinly CSV landing — same converter, Koinly Universal CSV path
• KoinX Custom File landing — same converter, KoinX .xlsx path
• Tron USDT (TRC-20) landing — TronGrid / Tron history path
• Ethereum (Etherscan) landing — Etherscan CSV → Koinly / KoinX
• BSC (BscScan) landing — BscScan CSV → Koinly / KoinX
• Polygon (Polygonscan) landing — Polygonscan CSV → Koinly / KoinX
• Arbitrum (Arbiscan) landing — Arbiscan CSV → Koinly / KoinX
• Optimism (Optimistic Etherscan) landing — Optimistic Etherscan CSV → Koinly / KoinX
• Avalanche (Snowtrace) landing — Snowtrace CSV → Koinly / KoinX
• Fantom (FtmScan) landing — FtmScan CSV → Koinly / KoinX
• Cronos (Cronoscan) landing — Cronoscan CSV → Koinly / KoinX
• Gnosis (Gnosisscan) landing — Gnosisscan CSV → Koinly / KoinX
• Linea (Lineascan) landing — Lineascan CSV → Koinly / KoinX
• zkSync Era (explorer.zksync.io) landing — zkSync Era explorer CSV → Koinly / KoinX
• Scroll (Scrollscan) landing — Scrollscan CSV → Koinly / KoinX
• Mantle (Mantlescan) landing — Mantlescan CSV → Koinly / KoinX
• Celo (Celoscan / explorer.celo.org) landing — Celoscan / explorer.celo.org CSV → Koinly / KoinX
• Blast (Blastscan) landing — Blastscan CSV → Koinly / KoinX
• Mode (Modescan) landing — Modescan CSV → Koinly / KoinX
• opBNB (opBNBScan) landing — opBNBScan CSV → Koinly / KoinX
• Taiko (Taikoscan) landing — Taikoscan CSV → Koinly / KoinX
• Moonbeam (Moonscan) landing — Moonscan CSV → Koinly / KoinX
• Metis (MetisExplorer) landing — MetisExplorer / Andromeda explorer CSV → Koinly / KoinX
• Free vs Pro — honest feature comparison
• Guides hub · FAQ · Terms
• FREE MIT on Getly
• PRO on Getly (USDC)
• GitLab MIT core
• Live guide (dev.to) — Tron USDT TRC-20 → Koinly CSV walkthrough; same free converter also exports KoinX Custom File (.xlsx)

Disclaimer

Not affiliated with Base, Basescan, Koinly, or KoinX. Not tax advice. Reformatting only — no capital-gains calculation, no filing. Always verify imports and consult a qualified professional for tax questions. Never enter a private key or seed phrase.

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GitLab: MIT core · Getly: FREE · PRO