loper

Loper · Developers

Open .py files on your Mac.

.py

Scripts and tools, readable at a glance without opening a project.

Loper is a free, minimal editor for macOS that opens Python 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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render.py opened in Loper: Python with color-coded Python
Show the file as text
import osfrom pathlib import Path ROOT = Path(os.environ.get("MEDIA_ROOT", "/Volumes/RAID"))  def clips(day: str) -> list[Path]:    """Every .mov shot on a given day."""    return sorted((ROOT / day).glob("*.mov"))  if __name__ == "__main__":    print(len(clips("2026-10-25")), "clips")

How to open .py files

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

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