If you are also searching for an alternative for replacing Adobe Flash Player in 2021, our team has already found the best five flash players for you! 5 Best Adobe Flash Player Alternatives to Use in 2021 Unfortunately, Adobe’s security and outdated features have been pulling it down and encouraging users to look for the best Adobe Flash Player alternatives. It supports multimedia content, helps in executing internet-rich applications, and streams audio and video files. Undoubtedly, Adobe Flash Player is the most popular and powerful flash player out there.