Subtitle Merger
Layer subtitle files, style each one, adjust timing, preview over video, then merge.
- In your browser
- Files never uploaded
- Free
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 should I use concat or interleave?
Use concat when each file represents sequential content (Part 1 → Part 2). Use interleave when files are timed against the same video and should be merged, such as dialogue.srt plus 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, and 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 styling and per-layer positions. SRT, VTT, SMI, TTML, SBV, LRC, and MicroDVD keep merged timing and text but not visual layer styling.