Subtitle Formats Compared
A side-by-side comparison of all major subtitle formats - SRT, VTT, ASS, SSA, LRC, SBV, and TXT - to help you choose the right one.
There are many subtitle formats, each designed for a specific purpose. SRT is the universal standard for video subtitles. VTT is the web standard for HTML5 video. ASS and SSA are powerful styled formats for desktop playback. LRC is for synced lyrics in music players. SBV is YouTube legacy subtitle format. TXT is plain text with no timing. Understanding the differences helps you pick the right format and convert between them when needed.
All Subtitle Formats at a Glance
| Feature | Simple Formats | Advanced / Specialized Formats |
|---|---|---|
| SRT | Universal video subtitles | Plain text, no styling, all devices |
| VTT | Web video (HTML5) | CSS styling, browser-native, W3C standard |
| ASS | Styled desktop subtitles | Fonts, colors, effects, karaoke |
| SSA | Legacy styled subtitles | Predecessor of ASS, v4 format |
| LRC | Synced song lyrics | Time-tagged text for music players |
| SBV | YouTube legacy subtitles | Comma-separated timestamps |
| TXT | Plain text only | No timestamps, just words |
| Best for | SRT (devices), VTT (web) | ASS (styling), LRC (lyrics) |
Video Subtitle Formats: SRT, VTT, ASS, SSA
These four formats are used for video subtitles. SRT is the most compatible, working on virtually every device and player. VTT is the web standard, native to HTML5 browsers. ASS is the most feature-rich, supporting full styling and effects for desktop playback. SSA is the older version of ASS, now mostly legacy. For most users, SRT covers general needs, VTT covers web needs, and ASS covers styling needs.
Lyrics Format: LRC
LRC is a time-synced lyrics format used by music players. Each line of lyrics is prefixed with a timestamp like [00:15.30], telling the player when to display that line. LRC files (.lrc) are used by music apps, karaoke software, and lyric display plugins. LRC is simpler than subtitle formats because it only needs line-level timing, not the precise in/out timing of video subtitles.
YouTube Legacy Format: SBV
SBV (SubViewer) is a subtitle format historically used by YouTube for community-contributed subtitles. It uses comma-separated timestamps (HH:MM:SS.mmm,HH:MM:SS.mmm) similar to SRT but without cue numbers. While YouTube now primarily uses its own timed text format, SBV files still circulate and may need conversion to SRT or VTT for use in other tools.
Plain Text: TXT
TXT is not a subtitle format in the traditional sense. It is the result of stripping all timing and formatting from a subtitle file, leaving only the spoken text. Converting subtitles to TXT is useful for creating transcripts, searching through dialogue, feeding text into analysis tools, or reading the content without a video player.
How to Choose the Right Format
Start with your target platform. For devices and desktop players, SRT is the safe default. For web video, use VTT. For styled releases (anime, karaoke), use ASS. For song lyrics, use LRC. If you have a file in one format and need another, use a converter. The most common conversions are SRT to VTT (for web) and ASS to SRT (for compatibility).
Quick Format Selector
Simple Formats
- ▸SRT - universal device and player compatibility
- ▸VTT - HTML5 web video and browser playback
- ▸TXT - extracting plain text transcripts from subtitles
Advanced / Specialized Formats
- ▸ASS - styled subtitles with fonts, colors, and effects
- ▸LRC - synced lyrics for music and karaoke
- ▸SBV - working with legacy YouTube subtitle files
Subtitle Formats FAQ
Which subtitle format is the most compatible?
SRT (SubRip) is the most universally supported subtitle format. Virtually every video player, smart TV, mobile app, and streaming platform can read SRT files. If compatibility is your priority, choose SRT.
Which subtitle format is best for web video?
VTT (WebVTT) is the standard for HTML5 web video. It is natively supported by the track element in all modern browsers and supports CSS-based styling and cue positioning.
Which subtitle format supports the most styling?
ASS (Advanced SubStation Alpha) supports the most styling features: custom fonts, colors, sizes, outline, shadow, positioning, rotation, transforms, and karaoke effects. It is the format of choice for visually rich subtitles.
What is the difference between subtitles and lyrics formats?
Subtitle formats (SRT, VTT, ASS) have precise start and end timestamps for each line, synced to video. Lyrics formats (LRC) have only a start time per line, synced to music. LRC is simpler and used by music players, not video players.
Can I convert between any subtitle formats?
Yes, with AllSubConverter you can convert between SRT, VTT, ASS, SSA, LRC, SBV, and TXT. Converting to TXT strips timing; converting from TXT to a timed format is not possible because TXT has no timing data.