SMI to TXT Subtitle Converter
Fast. Private. Perfect.
100% local processing in your browser. No upload. No waiting.
Drag & drop your SMI file here
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Supports .smi, .sami, .html files up to 50 MB
More Subtitle Tools
How It Works
Upload SMI File
Drag & drop or select your .smi file
Convert Instantly
We process it locally in your browser
Download TXT
Get your .txt file immediately
Why Choose AllSubConverter?
Your Privacy Matters
Everything runs in your browser. Your files are never uploaded.
Lightning Fast
Optimized processing engine converts files in seconds.
Free & Local
Each file can be up to 50 MB. Batches can contain up to 200 files or 1 GB total.
Works Everywhere
Works on Windows, Mac, Linux, iOS, Android - any modern browser.
Free Online SMI to TXT Converter
Our SMI to TXT converter reads Synchronized Accessible Media Interchange input and produces Plain Text output entirely in your browser. All timing and styling are stripped so you are left with a clean text transcript. The conversion runs client-side, so your subtitle files are never uploaded to a server.
Input Format
SMISMI (SAMI, Synchronized Accessible Media Interchange) is a Microsoft subtitle format built from HTML-like <SYNC> elements whose Start attribute is given in milliseconds. SMI supports multiple language tracks through CSS classes and was widely used for Windows Media Player captions and accessibility content.
Output Format
TXTTXT (Plain Text) output strips away all timing, sequence numbers, and formatting, leaving subtitle text as a clean transcript. This is useful for extracting scripts, building searchable transcripts, feeding text into translation or AI tools, or repurposing subtitle content as plain documents.
Features
Why Convert?
Format Differences
Common Use Cases
Transcript Extraction
Pull a clean plain-text transcript from subtitles for notes, scripts, or documentation.
Search & Indexing
Index subtitle content as searchable text without timing noise.
AI & Translation Input
Feed clean text into translation tools, summarizers, or other AI workflows.
Related Formats
Frequently Asked Questions
It reads a Synchronized Accessible Media Interchange file, parses each cue's timing and text, removes timing and formatting for Plain Text, and writes a valid .txt file.
Absolutely. Every conversion runs client-side in your browser. No subtitle data, file contents, or metadata is ever transmitted to a server.
Yes. SMI timing, styling, and markup are removed. Cue text is retained and separated by newlines; existing multi-line cues keep their internal line breaks.
Yes, completely free with no sign-up, no watermarks, and files up to 50 MB each. All processing happens in your browser, so your files are never uploaded to a server.
Timestamps are removed because TXT has no timestamp structure.
Yes. The converter is fully responsive and works in any modern mobile browser on iOS and Android.