HashRaw Welcome to the Blockchain

Bitcoin. It's your money!

Full support for Legacy, Segwit and Bech32 addresses!

Multi-Input / Multi-Output

Create a new transaction ยป

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Open Source

HashRaw 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.


We offer a fully transparent multisig solution which works seamlessly offline and with other bitcoin clients.

Raw Transactions

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


We support regular addresses, multisig, segwit / bech32 and stealth all with 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.

About open source bitcoin wallet


Compatible with bitcoin core

Wallet code itself cutted out, improved manual transaction processing

Legacy, Segwit and Bech32 addresses are supported

Please donate to 1LovzBsPqwHnY8gd3WCLUhpBNLDqUa3LAv if you found this project useful or want to see more features!

Transaction create a signed raw transaction

Use this page to create a signed raw transaction.

WIF key: Format:

Enter the address and amount you wish to make a payment to.
[Legacy, SegWit/Bech32 supported] Donate!

Address: Amount:
Input: Output: Miners Fee:                               
Sort Input/Output: Satoshi Per Byte [Optional]:

New Address create a new address

Brain Wallet. Random Address

Entropy Generated Address.

New Multisig Address Secure multisig address

Public keys can be generated in your browser or from your bitcoin client.

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.

Public Keys:

Enter the amount of signatures required to release the coins

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.

Broadcast Transaction into the bitcoin network

Enter your hex encoded bitcoin transaction

Create a Double-spending Transaction

  • Unsigned double-spending transaction will generated at server side and returned back
  • Private Key will be never sent out from your computer, new transaction will be signed in your browser! (Open Source code)
  • You need to specify Private Key of any your Address from the previous still unconfirmed transaction, only this Input will be double-spent
  • If more than one Input with the same Address in the unconfirmed transaction - Input with the highest amount will be selected and double-spent
  • All other Inputs (if any) will become available again in your wallet after new double-spending transaction confirmed by network
  • You may doublespend each Input (if multiple Inputs) as new transaction or doublespend just any one Input Address
  • New transaction will be broadcasted to the BTC network via our own specially configured nodes (no txn-mempool-conflict error)
  • Double-spending time can not be estimated but usually this is less than 48 hours, even a few minutes for RBF-enabled transactions
  • You will be able to verify New Transaction and check all Outputs and Amounts before Broadcast at Verify Tab
  • Bitcoin (BTC) is only supported for double-spending, no Bitcoin Cash, Gold or other bitcoin forks
  • This is not free-of-charge service. No refund under any circumstances.
  • Service fee BTC address will be automatically added to newly generated transaction
  • Service fee is 10% of Input Amount, but no less than 0.005 BTC (min) and no more than 0.05 BTC (max)

Please provide details for a new double-spending transaction

(will be used only locally within your browser, service will never send it out from your PC)

(need to be more than previous one)

Submitting button below you will request new double-spending transaction.
It will not be broadcasted to the Network without your approval at the next step!

Development Javascript framework, API and more

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

Settings making coinb.in even better!

These simple settings below make coinb.in one of the most decentralized wallets in the world.


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


Select the network you wish to broadcast the transaction via

Unspent outputs:

Select the network you wish to retreive your unspent inputs from

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!