Twitter said the change, part of its efforts to simplify its microblogging service, will happen in the next few months.
"A few simple changes to make conversations on Twitter easier! And no more removing characters for images or videos!" Chief Executive Jack Dorsey said in a 115-character tweet.
Twitter's stock touched a record low at $13.72 on Tuesday, while investor sentiment around Twitter stock plunged on social media, according to Reuters data.
Additional changes include the ability to retweet and quote-tweet a person's own posts.
Dorsey has said that the company, whose user growth has been stagnating, would simplify its product to attract new users.
Links currently take up to 23 characters of a tweet, limiting the commentary that users can offer when sharing articles or other content.
Many Twitter users took to social media to cheer the change.