loper

Loper · Sound & music

Open .rpp files on your Mac.

.rpp

REAPER keeps whole sessions as plain text: tempo, tracks, volume, routing and items.

Loper is a free, minimal editor for macOS that opens REAPER project (.rpp) instantly and colors every part of the file, so you find the value you need at a glance and can fix it right there. No IDE, no project to load, no gray wall of text.

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NightShift_Mix.rpp opened in Loper: REAPER project (.rpp) with color-coded Plain Text
Show the file as text
<REAPER_PROJECT 0.1 "7.22/macOS-arm64" 1792968000  TEMPO 120 4 4  SAMPLERATE 48000 0 0  <TRACK {8A1C2F3E-0000-4D1B-9C1A-7E2B5F0A1D11}    NAME "Dialog Boom"    VOLPAN 0.891 0 -1 -1 1    <ITEM      POSITION 12.48      LENGTH 6.2      <SOURCE WAVE        FILE "Audio/A001C003_Boom.wav"      >    >  >>

How to open .rpp files

  1. Download Loper (free, Apple silicon, signed and notarized) and move it to Applications.
  2. Double-click your .rpp file, drag it onto the Loper window, or right-click it and choose Open With › Loper.
  3. Want every .rpp file to open in Loper? Choose Loper › Make Loper the Default Editor….

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