Free services often display fake "Passwords found: 98%" progress bars. After waiting for 10 minutes, they tell you, “Server overloaded. Pay $49 to continue.” They have made money, and you have wasted your time.
You use a script to extract the "hash" of the 7zip file, then let your own computer's graphics card (GPU) try millions of combinations. 100% free, private, and uses your full hardware power. Requires some technical comfort with a command line. 2. The "Solid" Paid Service (If you give up) If you don't have a powerful PC, LostPassword.com (Passware) 7zip password unlocker online free top
Top 7-Zip Password Unlockers: How to Recover Your Files for Free Online Free services often display fake "Passwords found: 98%"