Subtitle Conversion & Sync

SRT ↔ SMI Conversion

1. Select File: Drag and drop your .srt or .smi file, or paste raw text.
2. Choose Target: Select either SMI or SRT.
3. Download: Download the converted subtitle file.

Sync Adjustment

• If subtitles appear too late: Click -0.5s or -1s to shift earlier.
• If subtitles appear too early: Click +0.5s or +1s to shift later.
• You can also enter custom millisecond values directly.

Merging two subtitles

In the Merge tab:

1. Provide two subtitle files (or paste the text). Any language pair works — matching is done on timing alone.
2. Choose which one goes on top. Setting each track's language is optional; it is used for the language tag when exporting SMI.
3. If the two tracks have different time baselines, adjust their sync offsets separately.
4. Click Download Merged Subtitle.