The website takes your uploaded .mp3 file, passes it through a script that changes the file extension text to .flp , and forces a download. When you try to open this file in FL Studio, you will receive a "File Corrupted" or "Unknown File Format" error because the file is still just raw audio data with a fake name.
If you want to replicate a specific song structure, let me know: What you are running mp3 to flp converter online
If you want to extract the notes, chords, or melodies from an MP3 to play with your own software instruments (VSTs) inside FL Studio, you need a MIDI converter. Bear Audio Tool, AudioToMIDI, or Convertio. The website takes your uploaded
: Tools like ConvertHelper may output a file with the .flp extension, but this rarely results in a functional project with separated stems or MIDI notes. Bear Audio Tool, AudioToMIDI, or Convertio
Drag your MP3 file (or your AI-separated stems) directly from your desktop into the playlist tracks.