SMI to TXT Converter
Fast. Private. Perfect.
100% local processing in your browser. No upload. No waiting. No limits.
Drag & drop your SMI file here
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Supports .smi files up to any size
More Subtitle Tools
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.
Truly Unlimited
No file size limits. No daily limits. Completely free.
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. Timing is normalized to TXT's expected format. All timing and styling is stripped so you are left with a clean transcript of the spoken text. 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 only the spoken dialogue 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, normalizes the structure for Plain Text, and writes a valid .txt file. Timing is normalized to TXT's expected format.
Absolutely. Every conversion runs client-side in your browser. No subtitle data, file contents, or metadata is ever transmitted to a server.
SMI carries styling or markup that TXT cannot represent, so that formatting is removed; only the dialogue text and timing are preserved.
Yes, completely free with no sign-up, no watermarks, and no file size limits. All processing happens in your browser, so your files are never uploaded to a server.
Timing is normalized to TXT's expected format.
Yes. The converter is fully responsive and works in any modern mobile browser on iOS and Android.