Free tool

What did this transaction do?

Paste any transaction hash. We'll tell you which protocol it used, what assets moved, and whether it's taxable in the UK.

Supports Ethereum, Arbitrum, Optimism, Base, and Polygon — chain is detected automatically.

How it works

1

Read

We pull the full transaction data from the blockchain — every token transfer, interaction, and internal call.

2

Classify

Our engine runs the transaction through 24 protocol-specific classifiers covering Uniswap, Aave, Lido, Curve, and more.

3

Explain

You get a plain English breakdown — what happened, what it's worth in GBP, and whether HMRC considers it taxable.

Want your full wallet classified?

This tool classifies one transaction at a time. Add your wallet to ChainTax to classify everything, calculate your capital gains, and generate an HMRC-ready tax report.

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