Subtitle Merger
Layer subtitle files, style each one, adjust timing, preview over video, then merge.
Drop subtitle files here (or click). Each file becomes a controllable layer.
SRT, VTT, ASS, SMI, TTML, SBV, LRC, MicroDVD, SubViewer
Frequently asked questions
When to use concat vs interleave?
Concat: when each file represents sequential content (Part 1 → Part 2). Interleave: when files are timed against the same video and should be merged (e.g. dialogue.srt + signs.srt).
How does concat handle the gap?
Each file’s cues are shifted to start after the previous file’s last cue plus the gap you set (default 2000ms).
Can I mix formats?
Yes. Drop SRT, VTT, ASS together — we parse each in its native format and emit one unified output in the format you choose.
Which output keeps font, color, size, and position?
ASS keeps the styling and per-layer positions. SRT, VTT, SMI, TTML, SBV, LRC, and MicroDVD keep the merged timing/text but do not preserve the visual layer styling.