Subtitle Edit

the subtitle editor :)

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Supported Subtitle Formats

Subtitle Edit supports a wide range of subtitle formats for reading and writing. Below is a summary of the major categories. For the full machine-generated list of formats the build currently knows about, run seconv formats from the command line.

Text-Based Formats

Format	Extension(s)	Documentation
SubRip	.srt	Format Reference
WebVTT (Web Video Text Tracks)	.vtt, .webvtt	Format Reference
Advanced SubStation Alpha (ASSA)	.ass	Format Reference
SubStation Alpha (SSA)	.ssa	Format Reference
MicroDVD	.sub
SAMI	.smi
Timed Text (TTML)	.ttml, .xml, .dfxp
iTunes Timed Text (iTT)	.itt
EBU STL	.stl
Spruce STL	.stl
Scenarist Closed Captions (SCC)	.scc
DVD Studio Pro	.txt
Cavena 890	.890
PAC	.pac
Cheetah	.cap
Avid DS	.txt
JSON (various)	.json
LRC (Lyrics)	.lrc
and many more…

See also:

• SubRip Format Reference — Complete guide to SRT format
• WebVTT Format Reference — Complete guide to WebVTT format (HTML5 standard)
• ASSA Format Reference — Complete guide to ASS/SSA format
• ASSA Override Tags Reference — Complete list of ASS/SSA override tags for styling and animation

Image-Based Formats

Format	Extension(s)
Blu-ray PGS (SUP)	.sup
VobSub (DVD)	.sub/.idx
BDN XML	.xml

Container Formats (with embedded subtitles)

Format	Extension(s)
Matroska (MKV/MKS)	.mkv, .mks
MP4 / MOV (text tracks)	.mp4, .m4v, .m4s, .3gp
Transport Stream (teletext, DVB-sub)	.ts, .m2ts, .mts
MacCaption	.mcc

Video Formats (for loading video)

Format	Extension(s)
Matroska	.mkv
MPEG-4	.mp4
Transport Stream	.ts
QuickTime	.mov
MPEG	.mpeg
Blu-ray Transport Stream	.m2ts

Note: Subtitle Edit ships with parsers/writers for 380+ text-based formats, plus a handful of binary and image-based ones. The format is auto-detected when you open a file.