If you are into making music but have no skill or hardware, one of the best ways to start is by using your computer browser to create new sounds and awsome ideas. This is a list of the best free online sites where you can create and collaborate music. Happy producing.

Audiotool
https://www.audiotool.com

Start making music in the cloud. Audiotool is a powerful online music production studio right in your browser. Some of the best features are 

• Modular Structure
• Over 250 000 Samples And Presets
• All Your Work Is Saved In The Cloud
• Huge Effects And Instruments Collection
• Tutorials

Soundtrap
https://www.soundtrap.com

With Soundtrap you make music online. You can plug in your own instrument, use the software instruments available in Soundtrap or just record a song directly with your computer microphone.
Some of the best features are

• Works On Multiple Platforms (Win, Mac, iPad, Android)
• Collaborations
• Recording
• Live Looping

Soundation
https://soundation.com

Soundation is a powerful online music studio with professional features like recording, effects, virtual instruments and over 700 free loops and sounds.
Some of the best features are

• Chrome And Flash Version
• Virtual Instruments And Effects
• Education Edition 
• Tutorials

AudioSauna
http://www.audiosauna.com

AudioSauna transforms your web browser into a fast and flexible music production studio with built in synthesizers and live effects. AudioSauna is a full-featured audio workstation with an easy-to-use and straightforward user interface. It enables using several advanced polyphonic synthesizers, samplers and live effects in real-time in the browser.
Some of the best features are

• Mixer With Level, Pan, Mute, Solo And AUX1 And AUX2 Levels
• Built-In Effects
• Snap To Grid
• Virtual Analog Synthesizer
• Frequency Modulation Synthesizer
• Advanced Sampler
  

Looplabs
https://looplabs.com/

Looplabs is a collaborative cloud based music studio that lets anyone, regardless of technical skills or ability, quickly and easily make professional quality music anywhere, anytime and with anyone. Stocked with tens of thousands of royalty-free sounds, you can easily make amazing music.
Some of the best features are

• Easy To Use
• Daily Updated Library
• Tutorials

UJAM
https://www.ujam.com

The UJAM Studio is your personal, easy to use, cloud-based studio that lets you make your own music – even if you don't have musical or technical knowledge.As UJAM uses real instruments recorded by professional producers, so the result will always sound great. Want your song to sound like Rock, Hip-Hop or Jazz? Every style is just one click away. You can even combine instruments from different genres and create your own custom style.
Some of the best features are

• Remix Songs By Other UJAM Artists
• Jam-a-Gram Turns Your Spoken Message Into Music - No Need To Sing
• Opportunities, Contests And Competitions

patatap
http://www.patatap.com

Patatap is a portable animation and sound kit. With the touch of a finger create melodies charged with moving shapes. While easy to pick up there is a wide range of possibilities. Switch between multiple color palettes and matching soundscapes on the fly. Whether its on your laptop, desktop, mobile phone, or tablet Patatap invites creators of all ages to engage the mind and senses in a different type of creation process.
Some of the best features are

• Play Sounds With Your Keyboard
• iOS And Android Apps
• Animated Sound
• Highly Addictive

Type Drummer
http://typedrummer.com

Write anything and create ASCII beats.
Some of the best features are

• Simple And Fun
• Two Sound Kits
• Share Your Beat