<p>As of November 2013, Bitcoin-qt generates a QR code.</p>

<p>Click the Addresses button at the top of the window, highlight the wallet address you want, and then click the "Show QR Code" button at the bottom of the window. Add a message, if you want, or not, and then click the "Save As" button. It will be saved as a PNG image file.</p>

CC BY-SA 3.0
2013-11-06T15:48:53.243Z
2013-11-06T15:48:53.243Z
user7551
<p>Nowadays pretty much every device has a camera built in so it is much easier to scan the QR code rather than typing very long Bitcoin account address. If you have wallet in your mobile phone and you want to send money to someone he can email you the QR code and you will be able to scan it quickly with your phone and send the money. Without that you would have to type in on your phone the whole Bitcoin address.</p>

<p>The same goes to receiving Bitcoins, you can easily send QR code to someone. If you make face to face transactions with Bitcoin you can exchange Bitcoin addresses just in few seconds, without typing.</p>

<p>To generate a QR code you can use one of the free online tools like <a href="http://qrcode.kaywa.com/" rel="nofollow">http://qrcode.kaywa.com/</a> or <a href="http://goqr.me/" rel="nofollow">http://goqr.me/</a>, after generating the code you can save it as a JPG file, print it and keep it in your wallet or even order a custom t-shirt so people can donate you some Bitcoins in the shopping centre just by pointing their cameras at you :D</p>

CC BY-SA 3.0
2013-03-04T17:27:36.843Z
Good answer, but how would you produce the QR code in the first place?
Nick ODell
CC BY-SA 3.0
2013-03-04T17:36:01.487Z
Good question, I have just extended my answer :)
NatWeb Solutions
CC BY-SA 3.0
2013-03-04T16:42:27.847Z
2013-03-04T17:35:45.777Z
2013-03-04T17:35:45.777Z
NatWeb Solutions
<p>The easiest way to create a bitcoin qr code is to use www.btcfrog.com/qr and just fill in the address and maybe amount boxes and press "generate QR code".</p>

<p>It also has an option to generate html code to embed on your site. The code is an image tag that references a php script so you can have javascript, asp, php etc change the amount and regenerate the "image".</p>

<p><img src="https://i.sstatic.net/J6tFc.png" alt="Btcfrog.com qr app download"></p>

<p>This also makes it ideal for adding in BB-code or other kinds of posts.</p>

CC BY-SA 3.0
2014-01-31T11:08:07.223Z
2014-01-31T14:36:26.913Z
2014-01-31T14:36:26.913Z
Anonymoose
<p>When using bitcoin to pay at the point-of-sale or for a face-to-face transaction, there is the problem of how to communicate the Bitcoin address to be paid in a way that the person paying can use.  </p>

<p>A bitcoin address is just data, but it is between 27 and 34 characters so that is way to much info to expect the person paying to have to manually type in.</p>

<p>A QR code can easily represent this amount of data in a machine-readable manner and do so reliably.  The QR code can contain other information as well -- such as an amount and a message and other fields as well -- thanks to a <a href="http://en.bitcoin.it/wiki/URI_Scheme" rel="noreferrer">URI scheme for Bitcoin</a>.</p>

<p>So with a mobile, a convenient way to pass that data is for the payment recipient (e.g., a merchant) to display a QR code with the Bitcoin address for the transaction, and then for the person paying to scan that QR code to obtain the bitcoin address. </p>

<p>A mobile app called <a href="https://play.google.com/store/apps/details?id=com.google.zxing.client.android" rel="noreferrer">Barcode scanner</a> from ZXing is the most widely used app on Android for this.  </p>

<p>If you are paying using the Blockchain for Android mobile app, then that app will let you touch the QR code button to launch the Barcode scanner app.  When the scan is complete, the Bitcoin address field (and amount field if the QR code contained the amount) will then be populated with the data from the QR code.  The person paying then hits send and the bitcoin transaction gets created and broadcasted by the mobile app.  Web-based wallets (e.g., Instawallet.org) can use a QR code as well, except the user may need manually do a paste of the clipboard contents after scanning.</p>

<p>The merchant or trader might use the same mobile app (e.g., Blockchain for Android) which has a built-in method to create and display the QR code for the customer to send payment to which occurs in just one step.  Many clients (including Bitcoin-Qt), <a href="http://en.bitcoin.it/wiki/Category%3aEWallets" rel="noreferrer">EWallets</a> and payment processors such as <a href="http://bitpay.com" rel="noreferrer">BitPay</a> and <a href="http://walletbit.com" rel="noreferrer">WalletBit</a> will show a QR code (or a method to get the QR code displayed) for receiving payment.</p>

<p>For those wishing to <a href="http://www.bitcoinmoney.com/post/9678390130" rel="noreferrer">create a QR code manually</a> can do so using a web-based service such as Wolfram Alpha or several other methods.  This does introduce a vulnerability however in that the provider of the QR code could detect that this is a Bitcoin address and maliciously interject another address that the provider controls -- thus directing the consumer to pay the wrong address.  So using only a trustworthy source to generate the QR codes is recommended.</p>

CC BY-SA 3.0
2013-03-04T20:03:19.237Z
2013-03-04T20:03:19.237Z
Stephen Gornick
<p>What are QR codes ?</p>

<p>How do you use the QR code for payment function on the wallet ?</p>

<p>When would you use it ?</p>

CC BY-SA 3.0
2013-03-04T15:13:05.983Z
See http://en.wikipedia.org/wiki/QR_code for your first question. With Bitcoin you generally scan the code with your smartphone app to know to which address to send the bitcoins.
Meni Rosenfeld
<transactions><wallet><qrcode>
What are QR codes and How do you use them as request payment from Wallet?
BitCoin New Guy
# What are QR codes and How do you use them as request payment from Wallet?

(Asked by: username_0 on 2013-03-04)

What are QR codes ?

How do you use the QR code for payment function on the wallet ?

When would you use it ?

**Tags:** transactions, wallet, qrcode

> **Comments:**
> **username_1**: See http://en.wikipedia.org/wiki/QR_code for your first question. With username_0 you generally scan the code with your smartphone app to know to which address to send the bitcoins.  

---

## 4 answers

### Answer by username_6 on 2013-03-04. Score: 6 | Accepted answer

When using username_0 to pay at the point-of-sale or for a face-to-face transaction, there is the problem of how to communicate the username_0 address to be paid in a way that the person paying can use.

A username_0 address is just data, but it is between 27 and 34 characters so that is way to much info to expect the person paying to have to manually type in.

A QR code can easily represent this amount of data in a machine-readable manner and do so reliably. The QR code can contain other information as well -- such as an amount and a message and other fields as well -- thanks to a [URI scheme for username_0](http://en.username_0.it/wiki/URI_Scheme).

So with a mobile, a convenient way to pass that data is for the payment recipient (e.g., a merchant) to display a QR code with the username_0 address for the transaction, and then for the person paying to scan that QR code to obtain the username_0 address.

A mobile app called [Barcode scanner](https://play.google.com/store/apps/details?id=com.google.zxing.client.android) from ZXing is the most widely used app on Android for this.

If you are paying using the Blockchain for Android mobile app, then that app will let you touch the QR code button to launch the Barcode scanner app. When the scan is complete, the username_0 address field (and amount field if the QR code contained the amount) will then be populated with the data from the QR code. The person paying then hits send and the username_0 transaction gets created and broadcasted by the mobile app. Web-based wallets (e.g., Instawallet.org) can use a QR code as well, except the user may need manually do a paste of the clipboard contents after scanning.

The merchant or trader might use the same mobile app (e.g., Blockchain for Android) which has a built-in method to create and display the QR code for the customer to send payment to which occurs in just one step. Many clients (including username_0-Qt), [EWallets](http://en.username_0.it/wiki/Category%3aEWallets) and payment processors such as [BitPay](http://bitpay.com) and [WalletBit](http://walletbit.com) will show a QR code (or a method to get the QR code displayed) for receiving payment.

For those wishing to [create a QR code manually](http://www.bitcoinmoney.com/post/9678390130) can do so using a web-based service such as Wolfram Alpha or several other methods. This does introduce a vulnerability however in that the provider of the QR code could detect that this is a username_0 address and maliciously interject another address that the provider controls -- thus directing the consumer to pay the wrong address. So using only a trustworthy source to generate the QR codes is recommended.


---

### Answer by username_2 on 2013-11-06. Score: 5

As of November 2013, username_0-qt generates a QR code.

Click the Addresses button at the top of the window, highlight the wallet address you want, and then click the "Show QR Code" button at the bottom of the window. Add a message, if you want, or not, and then click the "Save As" button. It will be saved as a PNG image file.


---

### Answer by username_3 on 2013-03-04. Score: 4

Nowadays pretty much every device has a camera built in so it is much easier to scan the QR code rather than typing very long username_0 account address. If you have wallet in your mobile phone and you want to send money to someone he can email you the QR code and you will be able to scan it quickly with your phone and send the money. Without that you would have to type in on your phone the whole username_0 address.

The same goes to receiving Bitcoins, you can easily send QR code to someone. If you make face to face transactions with username_0 you can exchange username_0 addresses just in few seconds, without typing.

To generate a QR code you can use one of the free online tools like <http://qrcode.kaywa.com/> or <http://goqr.me/>, after generating the code you can save it as a JPG file, print it and keep it in your wallet or even order a custom t-shirt so people can donate you some Bitcoins in the shopping centre just by pointing their cameras at you :D

> **Comments:**
> **username_4**: Good answer, but how would you produce the QR code in the first place?  
> **username_3**: Good question, I have just extended my answer :)  

---

### Answer by username_5 on 2014-01-31. Score: 1

The easiest way to create a username_0 qr code is to use www.btcfrog.com/qr and just fill in the address and maybe amount boxes and press "generate QR code".

It also has an option to generate html code to embed on your site. The code is an image tag that references a php script so you can have javascript, asp, php etc change the amount and regenerate the "image".

![Btcfrog.com qr app download](https://i.sstatic.net/J6tFc.png)

This also makes it ideal for adding in BB-code or other kinds of posts.


---

