World's largest crackmes (reverse engineering challenges) collection with solutions. 4,000 crackmes across x86/x64, Windows/Linux, and more. Since 2017.

Joined January 2026
Photos and videos
Crackmes.one retweeted
Hot off the press! Come grab a free RE//verse edition @pagedout_zine at the registration desk!
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Crackmes.one retweeted
الحمدلله, Finished 26th place at @CrackmesOne Reverse Engineering CTF. Had a lot of fun and enjoyed every challenge. The competition had 1500 players and ran for a full week. Great learning experience, definitely planning to play the next edition!
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Less than a week from the CrackmesOne CTF start -- are you ready? crackmesone.ctfd.io/

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If you enjoy #flareon, you should check out the Crackmes.one CTF (crackmesone.ctfd.io/). All RE challenges, one week in Feb, all challenges unlocked, solo mode, with nice prizes!
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