Subtitle Converter
Convert subtitle files between SRT, VTT, and SMI formats. Auto-detects encoding, preserves timestamps, and handles CP949 Korean subtitles.
SRT
VTT
Convert subtitle format
Drop files here or choose files
SRT, VTT, SMI, SAMI · Up to 1 files
Have an old SMI subtitle that modern players won't open, or need a VTT file for YouTube but only have SRT? Convert between SRT, VTT, and SMI in one click. CP949-encoded Korean subtitles are handled without garbled characters.
Key features
- Convert freely between SRT, VTT, and SMI (all 6 directions)
- Auto-detect encoding (UTF-8 and CP949)
- CP949 (Korean) output encoding option
- Preview converted result before downloading
- Millisecond-accurate timestamp preservation
- Processed in your browser — files never leave your device
How to use
- Drop or choose a subtitle file (SRT, VTT, or SMI).
- Confirm the detected format and pick the output format.
- Preview the first 5 cues to verify the conversion.
- Click "Convert" and download the result.
When to use
- When an old SMI subtitle won't open in a modern player
- When you need a VTT file for YouTube but only have SRT
- When CP949-encoded Korean subtitles show garbled text
- When you need to convert SRT subtitles to SMI for a legacy player
- When a subtitle editor doesn't support the format you have
Frequently asked questions
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