A whirlwind tour of Sinatra’s most interesting features.

Configuring Settings

Detailed documentation on all of Sinatra’s built-in settings and using set, enable, and disable to configure them.

Testing Sinatra with Rack::Test

Guide to testing Sinatra apps.


A collection of common Sinatra extensions, that tries to include the stuff developers ask for a lot and isn’t part of Sinatra.

Using Extensions

How to use Sinatra extensions in your application and links to extensions in the wild.

Writing Extensions

How to add new functionality to Sinatra using the extension APIs.


This gem protects against typical web attacks. Should work for all Rack apps, including Rails.

Project Information

Frequently Asked Questions

Answers to those questions most frequently asked on the mailing list and in #sinatra.

Release Notes

See the CHANGELOG for notes about each release.

API Documentation

RDoc documentation courtesy of

In the Wild

List of applications, libraries, websites and companies using Sinatra.

The Sinatra Book

An in-depth look at building and deploying Sinatra applications. Maintained by Chris Schneider and Zachary Scott.

Screencasts and Presentations

Sinatra, rack and middleware

Ben Schwarz presents Sinatra and his realisations of its inner workings in regard to Rack and Rack middleware at Melbourne RORO shortly after RailsConf (US).

RubyConf 08: Lightweight Web Services

Adam Wiggins and Blake Mizerany present Sinatra and RestClient at RubyConf 2008. The talk details Sinatra’s underlying philosophy and reflects on using Sinatra to build real world applications.

Meet Sinatra (PeepCode)

Dan Benjamin introduces Sinatra in an hour-long screencast. Build an ad server with DataMapper, JavaScript, HAML, and Sinatra. In collaboration with Sinatra creator Blake Mizerany. Only $9.

Classy Web Development with Sinatra (Prag’s Screencast Series)

Adam Keys and The Pragmatic Programmers have started a series of screencasts on Sinatra. The first two episodes cover creating a tiny web app and creating a REST service. $5 a pop.

Sinatra at Locos x Rails, in Buenos Aires

By Nicolás Sanguinetti, April 2009.

Introduction to Sinatra (

The first episode in’s Sinatra series.

An introduction to sinatra as a rest server from WebNet Conference

Sinatra autopsy by Aleksander Dabrowski

Around The Web

Peter Cooper’s compendium with links to tutorials, example applications, and presentations.

Using Compass for CSS in your Sinatra application