Automatic local transcription
Generate timed subtitles from a video's audio directly on your Mac.
Create automatic video subtitles on your Mac.
LegenDay is a native subtitle editor for Mac. Choose a video, transcribe speech locally, correct text and timing, translate subtitle groups on-device when you need another language, preview a caption style, and export a new file without changing the original.
macOS 14.6+ · Apple SiliconLocal media processingFree 3-day trial
A native subtitle editor built for macOS
LegenDay is a focused Mac subtitle editor with automatic transcription, subtitle review, on-device group translation, styling, preview, and video export. Your media is processed locally; internet access is used only for license checks and app updates.
Why choose LegenDay for Mac subtitle editing
If you are comparing subtitle editors for Mac, these are the practical criteria LegenDay is built around.
Native on Apple Silicon
Designed for macOS 14.6+ on Apple Silicon—not a web wrapper.
Local transcription
Video and audio stay on your Mac. Nothing is uploaded for transcription.
Edit text, timing, and style
Fix captions, adjust start and end times, and preview styles before export.
Safe new-file export
Export a new MKV with selectable subtitle tracks. The original file is never overwritten.
Free 3-day trial
Evaluate the full workflow before purchasing a license.
Create and refine subtitles in one workflow
Move from spoken audio to reviewed subtitles—and optional translated tracks—then export a new video without sending media to a transcription server.
Choose the audio track
Select which audio track to transcribe when a video contains more than one.
Edit text and timing
Correct subtitle text and adjust each caption's start and end time while previewing the video.
Use existing subtitles
Open supported subtitle tracks already included in a video and continue editing them.
Caption styles and preview
Choose a ready-made style and preview captions over the video before export.
Translate subtitle groups
Generate a new subtitle group in Portuguese, English, Spanish, French, or German with Apple on-device translation. Timings stay the same so you can export multiple tracks.
Safe new-file export
Export a new MKV video with selectable subtitle tracks. LegenDay does not overwrite the original.
Latest from the blog
Notes on LegenDay, subtitle workflows, and how it stacks up against other tools.
From video to reviewed subtitles
See every step, from choosing an audio track to saving a new video with selectable subtitle tracks.
See how LegenDay works →Designed for private, local media work
Transcription, editing, preview, and export happen on your Mac. LegenDay requires Apple Silicon and macOS 14.6 or later. License activation, periodic checks, purchase, and updates use an internet connection.
Privacy →Subtitle editor for Mac: common questions
Clear answers about Mac subtitle editing, local processing, trial access, and exported files.
What does LegenDay do?
LegenDay is a Mac subtitle editor that generates timed subtitles from video audio, lets you edit text and timing, optionally translate subtitle groups on-device, previews caption styles, and exports a new video with selectable subtitle tracks.
Does transcription work offline?
Video and audio processing run locally on your Mac. Internet is still required for license activation and checks, purchases, and app updates.
Do my videos leave my Mac?
No media is uploaded for transcription or subtitle translation. Your video, audio, and subtitle processing stay on your Mac. Apple Translation may download a system language pack the first time you translate into a language.
Which Macs are supported?
LegenDay requires an Apple Silicon Mac running macOS 14.6 or later. Intel Macs are not supported. Subtitle group translation requires macOS 15 or later.
Does LegenDay change the original video?
No. Export creates a new file and leaves the source video unchanged.
What does the exported file contain?
When generated subtitles are included, LegenDay currently exports a new MKV video with selectable subtitle tracks.
Can I choose between multiple audio tracks?
Yes. When the video includes multiple audio tracks, you can choose which one to transcribe.
How long is the free trial?
The free trial lasts 3 days and lets you evaluate the app before purchasing a license.
What makes a good subtitle editor for Mac?
A strong Mac subtitle editor should process media locally, let you edit text and timing, preview captions on the video, and export without overwriting the source. LegenDay is built for that workflow on Apple Silicon.
Is LegenDay a good alternative to cloud subtitle tools?
Yes, if you want transcription and editing on your Mac without uploading video for captions. Cloud tools may fit collaboration-heavy workflows; LegenDay focuses on private, local Mac subtitle editing.
Can I translate subtitle groups?
Yes. From a subtitle group you can generate a new group in Portuguese, English, Spanish, French, or German. Translation runs on-device with Apple Translation, keeps the original timings, and the new group can be exported as an additional soft subtitle track.
Ready to caption your next video?
Download LegenDay for Apple Silicon and try automatic local transcription free for 3 days.