The Ethereum explorer guide, with a live search built in

How to choose the right block explorer for Ethereum

There is no single best explorer, only the best one for a particular job. After testing them side by side on the same set of transactions, wallets and contracts, we judge them on six things: how clearly a transaction page explains what happened, how much a wallet page tells you about tokens and history, how well contracts are decoded and verified, what the API offers for free, how the site treats your privacy, and whether the code is open. Here is how the main contenders compare on the jobs people ask us about most.

For everyday checks, the difference between the top explorers is small, and familiarity is worth a lot. Most wallets link to Etherscan by default, so it is where most people start. If you are privacy-minded or you want to avoid depending on one company, Blockscout gives you nearly the same core experience with publicly available code you can host yourself. For power users, the interesting tools are the specialists: beacon chain explorers for validators, blob explorers for rollup data, mempool tools for pending transactions, and layer 2 explorers for Arbitrum, Base and OP Mainnet, where most day-to-day activity now happens.

Is there an official Ethereum block explorer?

This is one of the most searched questions about Ethereum explorers, and the honest answer is no. Ethereum has no company behind it and the Ethereum Foundation does not operate an explorer. Etherscan feels official because it was first to market in 2015, because MetaMask and many other wallets link to it, and because its name has become a verb. But it is an independent business based in Malaysia. The ethereum.org page on block explorers lists several options side by side. That independence is healthy: if one explorer goes down or makes a mistake, others show the same chain. We explain the history in our Etherscan review.

What you can look up: transactions, wallets, tokens and blocks

Almost everything you do with an explorer starts with one of four identifiers. A transaction hash is the receipt number for a single action and always looks like 0x followed by 64 hexadecimal characters. A transaction page shows whether it succeeded, how much ETH moved, what it cost in gas, and which tokens changed hands along the way. Our Ethereum transaction explorer guide takes you through every field, including the ones that confuse most people, like the difference between the “to” address and the real recipient of a token transfer.

An address is 42 characters long and belongs either to a wallet controlled by a private key or to a smart contract. Since the Pectra upgrade in May 2025, a normal wallet can also delegate to contract code through EIP-7702, which is why some explorers now label familiar wallets as “smart accounts”. Address pages show balances, token holdings, NFTs and the full history of interactions. The Ethereum address and wallet explorer guide explains how to use them to check approvals and spot address-poisoning scams. Many addresses also have a human-readable ENS name such as vitalik.eth, which you can type directly into our search.

Token contracts deserve their own mention because they are where most losses happen. Anyone can deploy a token called USDT with the same logo and ticker. The only thing that cannot be faked is the contract address. Our token explorer guide and smart contract explorer guide show what to check before you buy or approve anything: verified source code, holder concentration, owner privileges and the history of the deployer. For collectibles, the NFT explorer guide covers provenance and fake collections.

Finally, blocks are the heartbeat of the chain. A block page tells you who proposed it, how full it was, how much ETH was burned under EIP-1559 and how many blob transactions from rollups it carried. You rarely need a block page for personal finance, but it is the best way to understand network conditions, which is also why we built a live Ethereum gas tracker that turns the latest block data into a simple estimate of what a transfer costs right now.

How Ethereum’s upgrades changed what explorers show

Explorers have had to reinvent themselves several times, because Ethereum keeps changing under their feet. Each major upgrade added new fields to transaction and block pages, and knowing where they came from makes those pages much easier to read.

The next upgrade, Glamsterdam, is in testing as of September 2026. It is expected to bring enshrined proposer-builder separation and block-level access lists, which will once again change how block pages describe who built a block and how it was executed. We update our reviews whenever a new field shows up, so the guides stay current.

Mainnet, testnets and the wider Ethereum family

When people say “Ethereum explorer” they usually mean mainnet, the network where ETH has real value. But developers spend much of their time on test networks, and each one has its own explorers. Sepolia is the recommended testnet for applications and smart contracts. Hoodi, launched in March 2025, is the testnet for validators and staking infrastructure after Holesky was retired. Older networks such as Goerli, Ropsten and Rinkeby have been shut down, although their names still appear in old tutorials. Our Ethereum testnet explorer guide maps every network to its current explorers, and our live tool supports Sepolia and Hoodi out of the box.

Beyond Ethereum itself, there are two other families worth knowing. Layer 2 rollups like Arbitrum, Base and OP Mainnet process transactions off the main chain and settle back to it, and each has a dedicated explorer. And there are forks: Ethereum Classic, which kept the original chain after 2016, and EthereumPoW, a proof-of-work fork created at the Merge. Sending funds to the right address on the wrong chain is a surprisingly common mistake, so it pays to know which explorer belongs to which network.

For developers: APIs and explorers you can run yourself

If you are building a wallet, a dashboard or a trading bot, you will probably talk to an explorer through its API rather than its website. The landscape changed in 2025 and 2026 as Etherscan tightened its free tier, moved several chains to paid plans and reduced the number of records per request. Blockscout, by contrast, still offers a REST API without a key, which is what powers our own explorer. Public JSON-RPC nodes cover the basics when you need raw chain data. Our Ethereum explorer API comparison lays out the free tiers, rate limits and trade-offs, with short code examples.

For full control, you can run an explorer yourself. Blockscout’s code is public (source-available since its 2026 licence change, GPL-3.0 before that) and powers the official explorers of dozens of networks. Otterscan runs alongside an Erigon or Reth node and gives you a fast, private explorer on your own machine, with no third party seeing what you look up. Teams running private or permissioned Ethereum networks use the same tools. The open-source and private Ethereum explorer guide compares the projects on GitHub and explains what each one needs to run.

Why you can trust our reviews

ethexplorer.org is independent. We are not affiliated with the Ethereum Foundation or with any explorer we review, and no explorer pays for a place in our rankings. We test on mainnet with real transactions, compare results across explorers, and record where each one is faster, clearer or more accurate. When we recommend where to buy ETH, we point to an exchange that operates under registrations you can check yourself: we link to CEX.IO, which has been operating since 2013, is registered with FinCEN in the United States and holds a cryptoasset registration with the UK Financial Conduct Authority. You can verify any provider in the FCA register or the FinCEN MSB search. Read more about our methodology on the about page.

Nothing here is financial advice. Crypto assets are volatile, and the most useful thing an explorer can give you is not a prediction but a fact: what actually happened on the chain. Learn to read those facts and you will make fewer mistakes, whichever explorer you prefer.