Cointoolkit Welcome to the Blockchain


Be your own bank, take control of your own money and start using NuBits today!

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Open Source

Cointoolkit is an open source web based wallet written in javascript and released under the MIT license which means it's free to use and edit.


This is the first tool that supports combining signatures in a multi signature transaction. Verify your first transaction, click the number of signatures and combine the other versions

Raw Transactions

Create, verify, sign and broadcast custom raw transactions online with advanced features and minimal effort!


Quick access to an online wallet where only you have access to your own private keys!


We support regular addresses but also multisig and stealth, and access to your own private keys!


Use what we've built to write your own projects! See our documention (coming soon), or contribute at github.

Open Wallet browser based wallet

QR Code Generator transfer data easily between devices

You can store anything from an address to a entire transaction or a private key

Create new address

Any keys used you will need to manually store safely as they will be needed later to redeem the coins.

Address Options

You can use the advanced options below to generate different kind of keys and addresses.

New Multisig Address Secure multisig address

Public keys can be generated in your browser or from your wallet.

Enter the public keys of all the participants, to create a multi signature address. Maximum of 15 allowed. Compressed and uncompressed public keys are accepted.

Enter the amount of signatures required to release the coins


New HD Address making bip32 even easier

Use the form below to generate a master hierarchical deterministic address.

Address Options

You can use the advanced options below to generate different kinds of master addresses.

New Transaction Create a new transaction

Use this page to create a raw transaction

Address, WIF key or Multisig Redeem Script:

Advanced Options

Enter the address and amount you wish to make a payment to.

Enter the details of inputs you wish to spend.

Verify transactions and other scripts

Enter the raw transaction, redeem script, pubkey, hd address or wif key to convert it into a readable format that can be verified manually.


Sign Transaction once a transaction has been verified

Once you have verified a transaction you can sign and then broadcast it into the network.

Broadcast Transaction into the network

Enter your hex encoded transaction

Development Javascript framework, API and more

This section is currently under development and is subject to change.

About open source toolkit


What is Bitcoin?

Bitcoin is a type of digital currency in which encryption techniques are used to regulate the generation of units of currency and verify the transfer of funds, operating independently of a central bank. See for more information.

If you are looking to buy some Bitcoin try

This toolkit supports multiple cryptoassets other than bitcoin


Cointoolkit is a free and open source project released under the MIT license, originally released by OutCast3k as in 2013, and modified to work with Peershares assets by


Please donate here if you found this project useful or want to see more features!


Customize the wallet settings to allow using the toolkit in other cryptoassets.


Select which network you'd like to use for key pair generation.

Unspent outputs:

Select the provider you wish to retreive your unspent inputs from

Input amount:

Select the provider you wish to retreive transactions input amounts


Select the provider you wish to broadcast the transaction via

This page uses javascript to generate your addresses and sign your transactions within your browser, this means we never receive your private keys, this can be independently verified by reviewing the source code on github. You can even download this page and host it yourself or run it offline!