<p>It looks like a testnet option was merged in early 2017, but I'm not sure if it was released:</p>

<p><a href="https://github.com/spesmilo/electrum/commit/d042d6e970389f97331e9caae196bf7a3af1e293" rel="nofollow noreferrer">https://github.com/spesmilo/electrum/commit/d042d6e970389f97331e9caae196bf7a3af1e293</a></p>

<p><a href="https://github.com/spesmilo/electrum/issues/541" rel="nofollow noreferrer">https://github.com/spesmilo/electrum/issues/541</a></p>

CC BY-SA 3.0
2017-06-23T17:17:15.173Z
2017-06-23T17:17:15.173Z
Rich Apodaca
<p>Testnet transactions have the same format as mainnet transactions, so you can just create a raw transaction on your online testnet wallet, and get it signed by Electrum with a private key it thinks is associated with a mainnet address (the version byte is different, so the same hexadecimal private key will generate a different address on the testnet and on the mainnet, but the signature will still be valid).</p>

CC BY-SA 3.0
2016-11-25T12:53:26.637Z
2016-11-25T12:53:26.637Z
maservant
<p>Electrum can be started with the <code>--testnet</code> option to run on testnet.</p>

CC BY-SA 3.0
2017-06-23T23:55:12.507Z
2017-06-23T23:55:12.507Z
Ava Chow
<p>I appreciate I can do offline singing with bitcoin-core, but it's complex.  To make it easier, I would have to download the entire blockchain.</p>

<p>I have searched up electrum, but can't seem to find a testnet option.  </p>

<p>Any ideas?</p>

<testnet><offline><thin-clients><offline-transactions>
Does a thin client testnet wallet exist which allows offline signing?
user43545
# Does a thin client testnet wallet exist which allows offline signing?

(Asked by: username_0 on 2016-11-25)

I appreciate I can do offline singing with bitcoin-core, but it's complex. To make it easier, I would have to download the entire blockchain.

I have searched up electrum, but can't seem to find a testnet option.

Any ideas?

**Tags:** testnet, offline, thin-clients, offline-transactions


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## 3 answers

### Answer by username_1 on 2017-06-23. Score: 1

It looks like a testnet option was merged in early 2017, but I'm not sure if it was released:

<https://github.com/spesmilo/electrum/commit/d042d6e970389f97331e9caae196bf7a3af1e293>

<https://github.com/spesmilo/electrum/issues/541>


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### Answer by username_2 on 2016-11-25. Score: 1

Testnet transactions have the same format as mainnet transactions, so you can just create a raw transaction on your online testnet wallet, and get it signed by Electrum with a private key it thinks is associated with a mainnet address (the version byte is different, so the same hexadecimal private key will generate a different address on the testnet and on the mainnet, but the signature will still be valid).


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### Answer by username_3 on 2017-06-23. Score: 0

Electrum can be started with the `--testnet` option to run on testnet.


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