Redl file extension .Redl file extension is an extension that uses the newest variant of STOP (djvu) ransomware to mark files that have been encrypted. Ransomware is malware created by criminals that restricts access to the victim’s files by encrypting them and demands a ransom for a pair of key-decryptor, necessary for decrypting files. Files … Continue reading .Redl file extension. Remove Redl virus. Restore, Decrypt .redl files.