Blockchain tools

PoW 51% Attack Cost

A collection of coins and the theoretical cost of a 51% attack on each network.

BlockTrail

Bitcoin API and Block Explorer. Bitcoin data and payments made easy for developers, enterprises and service providers.

BTProof

Trusted timestamping on the Bitcoin blockchain.

bitcoinmonitor.net

Monitor your coins. We offer a secure payment solution. Unlike other services we don't need access to your wallet, and the customers directly pay to your wallet. No need to have bitcoin running on your webserver. You only need to provide your Bitcoin addresses and a callback url - We will inform you immediately when a payment has been done.

BitNodes

Cheap managed node VPS hosting services for every crypto coin, with community support.

Coinb.in

A Bitcoin Wallet written in Javascript. Supports Multisig, Custom Transactions, nLockTime and more!

Proof of Existence

Use our service to anonymously and securely store an online distributed proof of existence for any document. Your documents are NOT stored in our database or in the Bitcoin blockchain, so you don't have to worry about your data being accessed by others.

Bitaps

Bitaps is a Bitcoin Block Explorer (Browser) with embedded wallet and merchant API for commerce. Bitaps provides a platform based on full Bitcoin node with blockchain network events.

bitkoin.io

Bitcoin unit & currency calculator. Convert between global currencies and bitcoin, millibits, and microbits. Live exchange rates and public address balance lookups.

Bitcoin fees

Predicting bitcoin fees for transactions. Fees are displayed in Satoshis/byte of data. Miners usually include transactions with the highest fees first.

Smartbit

Smartbit Bitcoin Block Explorer. We are a passionate team in Melbourne Australia dedicated to building digital currency tools on the bitcoin blockchain.

Rootstock

Smart contracts platform powered by Bitcoin. RSK is the first open-source smart contract platform with a 2-way peg to Bitcoin that also rewards the Bitcoin miners via merge-mining, allowing them to actively participate in the Smart Contract revolution. RSK goal is to add value and functionality to the Bitcoin ecosystem by enabling smart-contracts, near instant payments and higher-scalability.

BtcBalance

BtcBalance is a service wich you can use to store your Bitcoin addresses to view their current balance and total received balance. You can add up to 50 addresses to your account and make as many accounts as you want. So if you're at school or work for instance and don't have access to your Bitcoin wallet, then you can add your addresses to your BtcBalance account and view their status.

WalletHQ

Get email notifications when your wallet's status changes

Chainalysis

Chainalysis provides anti-money laundering software for Bitcoin.