IMSC → SAMI
Convert IMSC to SAMI
Free online IMSC to SAMI subtitle converter. Transform IMSC (Netflix Timed Text) (.xml) files to SAMI (.smi) format instantly in your browser. No upload required.
Format Comparison
| IMSC | SAMI | |
|---|---|---|
| Full Name | IMSC (Netflix Timed Text) | SAMI |
| Extension | .xml | .smi |
| Category | xml | xml |
| Key Features | TTML-based, Netflix compliance, Rich styling, Region positioning, Precise timing | Multi-language support, CSS styling, HTML-like syntax, Class-based language switching |
| Common Uses | Netflix delivery, Streaming platforms, Professional localization, Broadcast-to-streaming workflows | Windows Media Player, Microsoft platforms, Multi-language captioning |
| Limitations | Complex XML structure, Strict validation requirements, Requires TTML knowledge | Windows-centric, Verbose syntax, Limited modern tool support |
How to Convert IMSC to SAMI
- 1
Open the subtitle converter
Go to the Subtitle Tool and select your source IMSC file by pasting the text or uploading the .xml file.
- 2
Set your framerate
Choose the framerate that matches your video (e.g., 23.976, 25, 29.97). This ensures frame-accurate timestamp conversion.
- 3
Select SAMI as output format
Choose SAMI (.smi) from the output format dropdown.
- 4
Download your converted file
Click the download button to save your converted SAMI file. You can also copy the output text directly.
Frequently Asked Questions
How do I convert IMSC to SAMI?
Upload or paste your IMSC (Netflix Timed Text) (.xml) file into the converter, select SAMI as the output format, and click Convert. The tool processes everything in your browser — no file uploads to a server.
What is the difference between IMSC and SAMI?
IMSC is imsc (internet media subtitles and captions) is a w3c profile of ttml used by netflix and other streaming platforms. SAMI is sami (synchronized accessible media interchange) is a microsoft-developed caption format using html-like markup. They differ in features like ttml-based (IMSC) versus multi-language support (SAMI).
Is the IMSC to SAMI converter free?
Yes, completely free with no limits. The converter runs entirely in your browser using the timecodes library — no server processing, no sign-up, no watermarks.
Will I lose formatting when converting from IMSC to SAMI?
SAMI has some limitations: windows-centric. Timing accuracy is preserved using frame-based conversion through the timecodes library, but format-specific features like ttml-based and netflix compliance may not carry over.