Pick the correction that matches the problem
Use a constant offset for a fixed delay, one-point sync to align a reference, or two-point sync when the timing error grows across the file.
Subtitle tools
Subtitle Time Shifter & Sync
Correct a constant subtitle delay, align two reference points, or compensate for timing drift without retyping cue timestamps.
Your subtitle file is processed in your browser and is not uploaded to Voice2Sub.
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Frame-rate conversion changes timing, not text
FPS conversion rescales cue timestamps. Subtitle text stays unchanged, and negative results are reported before download.
How to use this tool
- Choose a subtitle file.
- Select the operation and review cue diagnostics or loss warnings.
- Preview the result, then export if this operation provides an output.
Supported input and output
- Input
- SRT · VTT · ASS · SSA · TXT · CSV · JSON · LRC
- Output
- Same subtitle format
Questions about this tool
Should I use an offset or two reference points?
Use an offset when the delay is constant from start to finish. Use two points when the mismatch grows steadily, choosing accurately matched moments far apart.
Do my files or text leave this device?
Your source content is processed in this browser, not uploaded for processing. The browser may download a processing engine from Voice2Sub’s CDN. Those engine requests do not contain your source file.
Need subtitles created automatically from audio or video?Voice2Sub can transcribe spoken audio when you need a complete subtitle workflow instead of a file utility.
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