loper

Loper · Subtitles, captions & localization

Open .sami files on your Mac.

.sami .smi

Microsoft's HTML-like caption format, still used in web and broadcast workflows.

Loper is a free, minimal editor for macOS that opens SAMI captions (.smi) 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_EN.smi opened in Loper: SAMI captions (.smi) with color-coded HTML
Show the file as text
<SAMI><HEAD>  <TITLE>Night Shift</TITLE>  <STYLE TYPE="text/css">    .ENCC { Name: English; lang: en-US; }  </STYLE></HEAD><BODY>  <SYNC Start=1000><P Class=ENCC>You said midnight.</P></SYNC>  <SYNC Start=3400><P Class=ENCC>&nbsp;</P></SYNC></BODY></SAMI>

How to open .sami files

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

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