Free online SMI to ASS converter
How to convert SMI subtitle files to ASS format using Aegisub and online tools for advanced styling.
Convert SMI to ASS online - free
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Import a file from a URL
Paste a direct link to the file. We download it to our server and it is converted exactly like an upload.
How it works
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Upload your .smi file
Click to browse to select your file you want to convert or simply drag & drop your file into selected area.
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Perform .smi to .ass conversion
After successful file upload, click to convert when you are ready.
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Download converted .ass file
Conversion result is ready to download.
How to convert smi to ass file
- Video subtitles
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1yr
Understanding smi and ass subtitle file formats
SMI (SAMI, Synchronized Accessible Media Interchange) is a subtitle file format developed by Microsoft. It is commonly used for multimedia presentations and supports basic styling and multiple languages. SMI files are structured in HTML-like syntax, making them readable and editable with any text editor.
ASS (Advanced SubStation Alpha) is a more advanced subtitle format widely used for anime and video fansubbing. It supports complex styling, positioning, karaoke effects, and precise timing, making it ideal for high-quality subtitles.
Why convert smi to ass?
Converting smi to ass allows you to take advantage of the advanced styling and formatting features of the ASS format. This is especially useful for projects requiring custom fonts, colors, or effects that SMI cannot provide.
Best software for smi to ass conversion
The most recommended tool for converting SMI to ASS is Aegisub, a free, open-source subtitle editor. It offers robust support for ASS and can import SMI files for conversion and editing.
How to convert smi to ass using Aegisub
- Download and install Aegisub from the official website.
- Open Aegisub and go to File → Open Subtitles... to load your .smi file.
- Review and edit the subtitles as needed, taking advantage of ASS styling features.
- To save as ASS, go to File → Export Subtitles... and select Advanced SubStation Alpha (*.ass) as the output format.
- Click Save to complete the conversion.
Alternative online converters
If you prefer not to install software, online converters like Subtitle Edit Online or Subtitle Converter can also handle SMI to ASS conversion. Simply upload your SMI file, choose ASS as the output format, and download the converted file.
Tips for successful conversion
- Check the converted ASS file for formatting or timing issues, as some SMI features may not map perfectly to ASS.
- Use Aegisub's preview and styling tools to enhance your subtitles after conversion.
Note: This smi to ass conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
SMI vs ASS: format comparison
How the SMI and ASS formats compare on the properties that matter most for this conversion.
| Property | .SMI SAMI Caption File | .ASS Advanced SubStation Alpha |
|---|---|---|
| Text styling | Extensive | Extensive |
| On-screen positioning | Yes | Yes |
| Timing precision | Centiseconds | Centiseconds |
| Storage | Embedded in the file | Both |
| Player support | Limited | Wide |
| Plain-text readable | Yes | Yes |
| Typical file size | Very small | Small |
| Open standard | Partly open | Partly open |
| Introduced | 1998 | 1998 |
| Developer | Microsoft | Pavlov company / community (originally by Kotus) |
| MIME type | application/smil+xml | text/x-ass |
Suggested software and links: smi to ass converters
Frequently asked questions
Is the SMI to ASS converter free?
Yes, converting SMI to ASS on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my SMI file be?
You can upload SMI files up to 100 MB and convert up to 100 files at once in a single batch.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert SMI to ASS?
No. The SMI to ASS conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid SMI file for this SMI to ASS conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.