SMI to LRC Subtitle Converter
Transform Synchronized Accessible Media Interchange subtitles into LRC format instantly and privately in your browser.
Drag & drop your SMI file here
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Supports .smi, .sami, .html files up to 50 MB
Free Online SMI to LRC Converter
Our SMI to LRC converter reads Synchronized Accessible Media Interchange input and produces Lyrics output entirely in your browser. Source SMI timing (whole milliseconds (Start=...)) is converted to LRC timing ([mm:ss.xx] minute-second-centisecond). SMI styling and markup that the target format cannot represent are stripped, leaving valid, ready-to-use output. The conversion runs client-side, so your subtitle files are never uploaded to a server.
SMI to LRC Code Syntax & Structure Inspection
Side-by-side code inspection illustrating header definitions, timestamp syntax, and cue payload formatting
SMI vs LRC Technical Specifications
SMI
SMI (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.
LRC
LRC (Lyrics) is a timestamped lyrics format for music players and karaoke apps. Each lyric line is prefixed with a [mm:ss.xx] timestamp. LRC has no end times (a line ends when the next begins) and no styling, making it ideal for synced song lyrics rather than film subtitles.
Format Differences
Conversion Troubleshooting & Gotchas
Practical solutions for player compatibility, character encoding, and timing synchronization
Subtitle timing drifts or appears out of sync on media players
Video files frequently differ in framerate (e.g., 23.976 fps vs 25 fps). If the timing drifts steadily, use our Subtitle Sync tool to adjust the global offset or framerate stretch.
Characters appear as garbled symbols or question marks (Mojibake)
Legacy files saved in Windows-1252, Shift-JIS, or GBK may render incorrectly. Our exporter standardizes output to clean UTF-8. Use our Subtitle Encoding Converter if the source file is corrupted.
Overlapping captions when multiple speakers talk simultaneously
Different formats handle overlapping dialogue differently. If your target player cannot render stacked cues cleanly, open the file in our Subtitle Editor to adjust individual cue timings.
Video editing software (Premiere, DaVinci, Final Cut) rejects the file
Professional NLE software enforces strict syntax rules. Our converter eliminates malformed line breaks and non-standard tags, producing clean, standardized files.
Features
Why Convert?
Common Use Cases
Synced Lyrics
Turn timed subtitles into LRC lyric files for music players that display synced song lyrics.
Karaoke
Produce LRC files for karaoke applications that read line-synced lyrics.
Music Apps
Generate LRC for MiniLyrics, Poweramp, and other lyric-capable music players.
Related Formats
SRT (SubRip)
The universal plain-text alternative: convert to SRT for maximum device compatibility.
VTT (WebVTT)
The web alternative: convert to VTT if your target is HTML5 video or YouTube.
TXT (Plain Text)
The transcript alternative: convert to TXT for a clean plain-text transcript.
How It Works
- 1
Upload your .smi file by dragging it in or browsing.
- 2
The parser reads the Synchronized Accessible Media Interchange structure and extracts each cue's start, end, and text.
- 3
Source SMI timing (whole milliseconds (Start=...)) is converted to LRC timing ([mm:ss.xx] minute-second-centisecond).
- 4
SMI styling and markup are stripped, and cues are formatted to the LRC specification.
- 5
The output .lrc file is generated and ready to download.
More Subtitle Tools
Frequently Asked Questions
It reads a Synchronized Accessible Media Interchange file, parses each cue's timing and text, strips SMI markup, and writes a valid .lrc file. Source SMI timing (whole milliseconds (Start=...)) is converted to LRC timing ([mm:ss.xx] minute-second-centisecond).
Absolutely. Every conversion runs client-side in your browser. No subtitle data, file contents, or metadata is ever transmitted to a server.
SMI styling and markup are removed. Cue start times are truncated to centisecond precision and end times are not represented. Multi-line cue text remains multi-line, with only the first line receiving the timestamp.
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.
Source SMI timing (whole milliseconds (Start=...)) is converted to LRC timing ([mm:ss.xx] minute-second-centisecond).
Yes. The converter is fully responsive and works in any modern mobile browser on iOS and Android.
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