Modern versions of the software check keys against online servers. If you are using an older, "fixed" version, the server may have blacklisted the key.
If the current version of Freemake remains problematic, several reputable, free, and open-source alternatives offer similar or superior functionality without the need for activation keys: Top 10 Freemake Alternatives & Competitors in 2026 - G2 freemake audio converter 11913 key fix
was a specific release of the Freemake Audio Converter designed to handle over 50 audio formats (MP3, AAC, WMA, FLAC, etc.) and extract audio from videos. Modern versions of the software check keys against