Guides
Short, practical explanations that go with our tools.
- SRT vs VTT vs ASS: Which Subtitle Format Should You Use?A plain-English comparison of SRT, WebVTT and ASS subtitle formats: features, compatibility, styling and when to choose each one — with conversion links.
- How to Fix Out-of-Sync Subtitles: Delay, Drift and FPSSubtitles too early, too late or slowly drifting? Learn how to diagnose the problem and fix it with a shift, a two-point sync or a frame-rate conversion.
- Why Subtitles Show Strange Characters (and the Fix)Question marks, “é” or boxes instead of letters? Learn how text encodings work, how to recognise the cause of garbled subtitles and repair the file.
- Subtitle Timing and Reading Speed GuidelinesHow long should a subtitle stay on screen? Learn the standard limits for characters per second, line length, lines per cue, minimum and maximum duration.
- How to Add Subtitles to an HTML5 Video With WebVTTAdd captions and subtitles to the HTML5 video element with a track tag and a WebVTT file. Covers languages, default track, styling, CORS and common problems.
- How to Extract Subtitles From an MKV or MP4 Video FilePull embedded subtitle tracks out of an MKV or MP4 video with MKVToolNix or FFmpeg, and learn what to do with image-based PGS and VobSub subtitles.