Subtitle Edit is a free, portable editor for video subtitles.

Subtitle Edit might be free, but as subtitle editors go, it could pass as a professional program. Because of the length of a possible full review, we'd suggest you check our list of features, our screenshot below, or even try it first online.

Here is the list of features:

Create/adjust/sync/translate subtitle lines
Convert between SubRip, MicroDVD, Advanced SubStation Alpha, Sub Station Alpha, D-Cinema, SAMI, youtube sbv, and many more (280+ different formats!)
Cool audio visualizer control - can display waveform and or spectrogram
Video player uses DirectShow, VLC media player, or MPlayer
Visually sync/adjust a subtitle (start/end position and speed)
Auto Translation via Google translate
Rip subtitles from a (decrypted) DVD
Import and OCR VobSub sub/idx binary subtitles
Import and OCR Blu-ray .sup files - bd sup reading is based on Java code from BDSup2Sub by 0xdeadbeef)
Can open subtitles embedded inside Matroska files
Can open subtitles (text, closed captions, VobSub) embedded inside mp4/mv4 files
Can open/OCR XSub subtitles embedded inside DivX/Avi files
Can open/OCR DVB and teletext subtitles embedded inside .ts/.m2ts (Transport Stream) files
Can open/OCR Blu-ray subtitles embedded inside .m2ts (Transport Stream) files
Can read and write both UTF-8 and other Unicode files and ANSI (support for all languages/encodings on the pc!)
Sync: Show texts earlier/later + point synchronization + synchronization via other subtitle
Merge/split subtitles
Adjust display time
Fix common errors wizard
Spell checking via Open Office dictionaries/NHunspell (many dictionaries available)
Remove text for hearing impaired (HI)
Renumbering
Swedish to Danish translation built-in (via Multi Translator Online)
Effects: Typewriter and karaoke
History/undo manager (Undo=Ctrl+z, Redo=Ctrl+y)
Compare subtitles
Multiple search and replace
Change casing using names dictionary
Merge short lines/split long lines
Export to PNG images (+bdn XML), Adobe Encore FAB image script, VobSub, Blu-ray sup, EBU STL, PAC, and plain text

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