Comixology is a cloud based digital comics platform by Amazon where you can buy Marvel comics, DC comics, Graphics novels, and also Managa and Indie comics too.
If you are interested in reading comics online you can get a lot of FREE comics from the website. You will have to create a new account or else you can use your amazon account (if you have one, or create one for FREE) to get the magazines. Visit the Free comic section of the website using this link where you can see many free comics like
Captain America 75th Anniversary Magazine Issue #1
Superman/Batman: Batman v. Superman: Dawn of Justice Special Edition #1
Superman/Batman: Batman v. Superman: Dawn of Justice Special Edition Issue #1
Marvel Avengers Alliance (2016) #1
Marvel Avengers Alliance (2016) Issue #1
Overwatch #1
Avenging Spider-Man (2011-2013) #1
Alterna AnniverSERIES: FUBAR
Star Wars Movie Sampler (2015) #1
Alterna AnniverSERIES: The Big Bad Book
Bucky Barnes: The Winter Soldier (2014-2015) #1
Hellboy 20th Anniversary Sampler #0
Batman Adventures: Halloween ComicFest Special Edition (2015) #1
Marvel's Jessica Jones #1
Amazing Spider-Man (1999-2013) #546
Titan Comics/LICAF: Lost in Space Anthology #1
Star Wars Previews #1
Hitman: Agent 47: Official Movie Prelude
Just add them into the cart and check out.
View then in My Library section of the website
Read them
You will not need a credit card to buy the Free Comics.
Thank you Ashwin.