ScribeVids can export subtitles in three formats. They look similar at a glance but have very different capabilities. Here is the short version, then a deeper comparison.
Quick recommendation
- Use SRT for YouTube, podcast hosts, video editors and 99% of upload destinations.
- Use VTT when you are embedding subtitles in an HTML5 <video> element on the web.
- Use ASS when you need styled, positioned or animated captions (anime fansubs, kinetic typography).
Side-by-side comparison
| Capability | SRT | VTT | ASS |
|---|---|---|---|
| Plain text captions | Yes | Yes | Yes |
| Italic / bold styling | Limited | Yes | Yes |
| Custom fonts & colors | No | Limited | Yes |
| Per-line positioning | No | Yes | Yes |
| Animations & karaoke | No | No | Yes |
| Cue metadata / regions | No | Yes | Limited |
| Browser <track> support | No | Yes | No |
| YouTube upload | Yes | Yes | No |
| File size | Smallest | Small | Largest |
| Human-readable | Yes | Yes | Less so |
SRT (SubRip Subtitle)
SRT is the universal lowest-common-denominator. Numbered cues, a timestamp range, then plain text. Every video editor, YouTube, Vimeo, TikTok caption uploader and OTT platform accepts it.
When to use SRT
- Uploading captions to YouTube, Vimeo, LinkedIn or TikTok.
- Importing into Premiere Pro, Final Cut, DaVinci Resolve or CapCut.
- Sending to a translator or proofreader in a plain editor.
VTT (Web Video Text Tracks)
VTT is the W3C standard for HTML5 video. It is the only format the browser <track> element accepts natively. Adds cue settings (position, alignment, line) and CSS-style metadata.
When to use VTT
- Embedding captions in a custom HTML5 video player on your own site.
- Streaming via HLS or DASH (VTT is the standard sidecar format).
- Audio descriptions and chapters in addition to captions.
ASS (Advanced SubStation Alpha)
ASS is the heavyweight. Originally developed for anime fansubs, it supports per-line styling, positioning anywhere on screen, fade and movement animations, karaoke effects and embedded fonts.
When to use ASS
- You want styled, branded captions that match a graphic identity.
- You are doing kinetic typography or animated lower-thirds.
- You are mastering a localized version with regional formatting.
Can I convert between them?
Yes. ScribeVids generates all three from the same transcription, so you do not need to convert manually. If you only have one format and need another, ffmpeg can convert between them with: ffmpeg -i input.srt output.vtt