Break on sentence flow
Cues follow the shape of speech and never split a word. Oversized passages break where a viewer naturally pauses.
Private, on-device subtitle authoring
Subtitles that fit the picture.
Generated on your Mac.
Turn video and audio into properly timed subtitles. The speech model is bundled inside the app—nothing to download, and nothing ever leaves your Mac.
Download on theMac App Store
$24.99One-time purchase · No subscription
interview-final.mov
CUES
We built it to work where your footage lives—right here on your Mac.
00:14:2000:14:2200:14:2400:14:26
42We built it to work where your footage lives—
43right here on your Mac.
TRANSCRIPTION IS ONLY THE START
Speech blocks are not subtitles.
Raw speech recognition produces long blocks with arbitrary timing. Real subtitles have rules: they must read naturally, fit the frame, remain visible long enough, and hand off cleanly to the next cue.
SubtitleForge applies those rules after transcription, turning words into cues made for watching.
Balance two-line cues
Line breaks are redistributed to avoid one long line floating above a short one. The picture stays calm and readable.
Enforce reading speed
When a cue is too fast, SubtitleForge extends its timing instead of cutting words. Reading speed is measured in characters per second.
Protect every boundary
No cue remains on screen when the next begins. Every cue also respects your minimum and maximum duration.
Review5 issues
Reading too fast21.4 cps
Sitting too briefly0.82 s
Running too long8.14 s
Overflowing a line47 / 42 ch
Overlapping next cue−0.18 s
Every figure links to its exact cue
REVIEW WITH EVIDENCE
Know exactly what needs attention.
The review pass lists cues that read too fast, sit too briefly, run too long, overflow a line, or overlap the next. Every warning includes the exact figure, so you can fix with confidence instead of scrubbing and guessing.
YOUR RULES, BUILT IN
Broadcast defaults.
Fully adjustable.
Start with dependable broadcast settings: 42 characters per line, two lines, and 17 characters per second. Then adjust line length and reading speed for your delivery format.
42 characters / line2 lines17 characters / second
Subtitle rules Broadcast
123
Shift the whole file
Move every cue earlier or later with one timing control. Useful when the edit changes but the words do not.
Export what you need
Deliver SubRip .srt, WebVTT .vtt, or a clean plain transcript.
ONE APP. ONE PURCHASE.
Your footage stays yours.
SubtitleForge runs entirely on your Mac, with the speech model included. No account. No cloud queue. No subscription.
Download on theMac App Store
$24.99 USDmacOS 14+ · Apple silicon & Intel