# BrowserSync [![Build status] (https://ci.appveyor.com/api/projects/status/r5vung2ipn9uj4sy)](https://ci.appveyor.com/project/shakyShane/browser-sync) [] (https://travis-ci.org/shakyShane/browser-sync) [](https://coveralls.io/r/shakyShane/browser-sync?branch=master) [](http://npmjs.org/package/browser-sync)
> Keep multiple browsers & devices in sync when building websites.
BrowserSync is developed and maintained internally at JH, follow @BrowserSync on twitter for news & updates.
##Features
1. **Scroll** - I can keep your pages in sync when scrolling.
2. **Forms** - You fill out a form in one browser, I'll copy the data to all the others.
3. **Links** - I'll watch your clicks and make all the other browsers follow you.
4. **CSS injecting** - I can even watch your CSS files & inject them when they change.
5. **Live Reload** - I can also watch files like HTML and PHP & when they change I can reload all browsers for you.
6. **Built-in Server** - Yep, I can serve static files too if you need me to (uses Connect).
7. **Use with any back-end setup** - I even have a proxy option so that I can be used with existing PHP, Rails, Python, Node or ASP.net setup.
8. **Public URL** - View your website via a URL that any internet connected device can access & maintain all BrowserSync features.
9. **Browser Stack support** - Use the all of my features when viewing your site through Browser Stack.
##When is it useful?
It's pretty useful when used with a single browser, watching a CSS file for changes & injecting it. But the real power comes when you're building responsive sites and using multiple devices/monitors because it can keep all browsers in sync & make your workflow much faster.
##Requirements
BrowserSync works by injecting an asynchronous script tag (``) right after the `` tag
during initial request. In order for this to work properly the `` tag must be present. Alternatively you
can provide a custom rule for the snippet using [snippetOptions](http://www.browsersync.io/docs/options/#option-snippetOptions)
##Install
```
npm install -g browser-sync
```
##How to use it
1. [Command line](http://www.browsersync.io/docs/command-line/)
2. [API](http://www.browsersync.io/docs/api/)
## Using Grunt?
There's a [separate plugin](https://github.com/shakyShane/grunt-browser-sync) for that
## Using Gulp?
No problem, here's a [setup guide](http://www.browsersync.io/docs/gulp)
## Using Brunch?
Enjoy the [browser-sync-brunch plugin](https://github.com/ocombe/browser-sync-brunch)
## Screencasts
[Some listed here](https://github.com/shakyShane/browser-sync/wiki/Screencasts)
Want any more? Something specific? ask me nicely [@shaneOsbourne](http://www.twitter.com/shaneOsbourne)
##Support
If you've found Browser-sync useful and would like to contribute to its continued development & support, please feel free to send a donation of any size - it would be greatly appreciated!
[](https://www.gittip.com/shakyshane)
[](https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=shakyshane%40gmail%2ecom&lc=US&item_name=browser%2dsync)
## Contributors
```
778 Shane Osbourne
29 Shinnosuke Watanabe
19 Shane Daniel
13 Hugo Bessa
11 Paul Kinlan
8 shinnn
3 Marek 'saji' Augustynowicz
3 Werner van Deventer
3 Adam Lynch
2 Paul Robertson
2 Dan Tello
2 Hugo Dias
2 Michael Branch
2 Olivier Combe
2 Piotr Kaleta
2 brutaldev
2 chase_chou
1 Dave Hall
1 mericson
1 Robert Vock
1 Craig Morris
1 Cedric Kastner
1 Carl Henderson
1 Sylvain Emery
1 Tony Holdstock-Brown
1 Victor Fernandez de Alba
1 Cameron Spear
1 Yazhong Liu
1 Jory Graham
1 BenjamÃn Eidelman
1 viktor hesselbom
1 Guillaume Lambert
1 Peter Blazejewicz
```
## License
Copyright (c) 2014 Shane Osbourne
Licensed under the GPL license.