SAMI → DFXP
Convert SAMI to DFXP
Free online SAMI to DFXP subtitle converter. Transform SAMI (.smi) files to DFXP (TTML) (.dfxp) format instantly in your browser. No upload required.
Format Comparison
| SAMI | DFXP | |
|---|---|---|
| Full Name | SAMI | DFXP (TTML) |
| Extension | .smi | .dfxp |
| Category | xml | xml |
| Key Features | Multi-language support, CSS styling, HTML-like syntax, Class-based language switching | TTML-based, XML structure, Styling support, Layout regions |
| Common Uses | Windows Media Player, Microsoft platforms, Multi-language captioning | Subtitle distribution, Platform interchange, Legacy TTML workflows |
| Limitations | Windows-centric, Verbose syntax, Limited modern tool support | Superseded by IMSC, Verbose XML, Inconsistent implementations |
How to Convert SAMI to DFXP
- 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 DFXP as output format
Choose DFXP (TTML) (.dfxp) from the output format dropdown.
- 4
Download your converted file
Click the download button to save your converted DFXP file. You can also copy the output text directly.
Frequently Asked Questions
How do I convert SAMI to DFXP?
Upload or paste your SAMI (.smi) file into the converter, select DFXP 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 DFXP?
SAMI is sami (synchronized accessible media interchange) is a microsoft-developed caption format using html-like markup. DFXP is dfxp (distribution format exchange profile) is a profile of ttml (timed text markup language) for subtitle distribution. They differ in features like multi-language support (SAMI) versus ttml-based (DFXP).
Is the SAMI to DFXP 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.