SAMI → IMSC
Convert SAMI to IMSC
Free online SAMI to IMSC subtitle converter. Transform SAMI (.smi) files to IMSC (Netflix Timed Text) (.xml) format instantly in your browser. No upload required.
Format Comparison
| SAMI | IMSC | |
|---|---|---|
| Full Name | SAMI | IMSC (Netflix Timed Text) |
| Extension | .smi | .xml |
| Category | xml | xml |
| Key Features | Multi-language support, CSS styling, HTML-like syntax, Class-based language switching | TTML-based, Netflix compliance, Rich styling, Region positioning, Precise timing |
| Common Uses | Windows Media Player, Microsoft platforms, Multi-language captioning | Netflix delivery, Streaming platforms, Professional localization, Broadcast-to-streaming workflows |
| Limitations | Windows-centric, Verbose syntax, Limited modern tool support | Complex XML structure, Strict validation requirements, Requires TTML knowledge |
How to Convert SAMI to IMSC
- 1
Open the subtitle converter
Go to the Subtitle Tool and select your source SAMI file by pasting the text or uploading the .smi 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 IMSC as output format
Choose IMSC (Netflix Timed Text) (.xml) from the output format dropdown.
- 4
Download your converted file
Click the download button to save your converted IMSC file. You can also copy the output text directly.
Frequently Asked Questions
How do I convert SAMI to IMSC?
Upload or paste your SAMI (.smi) file into the converter, select IMSC 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 SAMI and IMSC?
SAMI is sami (synchronized accessible media interchange) is a microsoft-developed caption format using html-like markup. IMSC is imsc (internet media subtitles and captions) is a w3c profile of ttml used by netflix and other streaming platforms. They differ in features like multi-language support (SAMI) versus ttml-based (IMSC).
Is the SAMI to IMSC 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.