1. The subtitle file

SubRip (.srt), WebVTT (.vtt), and the dialogue lines of SubStation Alpha (.ass, .ssa).

Drop a subtitle file here, or open one Nothing leaves the machine. You can pull the network cable out first.

No file open yet.

2. The video or audio, if you have it

Open the media beside the subtitles and check the cues by eye and ear.

3. The cues

Nothing open.

Open a file and the cues appear here. Every field is editable where it sits.

4. Timing

Every one of these can be taken back with Undo.

Shift by, in seconds

Which cues

Frame rate change

Multiply every time by

A rate change is a multiplication, not a shift: the further into the file a cue is, the further it moves.

New start for the selected cue

Move everything after it by the same amount

5. Find and replace

Find

Replace with

Match upper and lower case exactly

Plain text, not a regular expression.

6. What might be wrong

The counts are live. Go to walks through the cues one at a time and selects each one.

Frame rate, for the frame counts

Shortest readable cue, in seconds

Longest cue, in seconds

Reading speed limit, characters a second

Longest line, in characters

Most lines in a cue

7. Save it

Keep the source file's byte-level habits: byte order mark, line endings, decimal marks, cue numbering and the spacing between cues Put timestamps in the plain transcript

Files are written in this tab and handed to the browser's own download.

Doing this often? OBSCURA Sound edits the soundtrack the subtitles follow: cuts, fades, noise reduction and the loudness for broadcast or a podcast. On its own, US$4 a month; with everything else, US$9 a month or US$79 a year. 7 days free.

Edit, retime and convert subtitles SUBS