Add captions to a video without an editor
Three ways to get timed words on screen: load an .lrc or .srt you already have, tap Enter as each line starts, or let a Whisper model transcribe the track inside your browser. The words render straight into the export.
Who this is for
- Musicians captioning a lyric video
- Podcasters captioning an audiogram
- Anyone who needs captions but not a video editor
Bring a file you already have
Tune → Lyrics loads .lrc, .srt or plain .txt. A timed file starts displaying immediately; an untimed one stays hidden until you time it, and the status line keeps telling you how many lines are still unstamped so you know where you are.
Tap-sync in one pass
Paste the words, start Tap-sync mode and press Enter as each line begins. Lines appear as you tap, so you can see straight away whether you are early, and one play-through is usually enough. It beats typing timecodes into a text file by a wide margin.
Or transcribe it locally
Auto-transcribe runs Whisper in the browser and returns word-level timestamps. The model downloads once — about 60 MB, cached afterwards — and the audio never leaves your device, which is not true of most captioning services.
How to do it
- Open BLOOB, load your audio and open Tune → Lyrics
- Load an .lrc or .srt, paste the words, or press Auto-transcribe with AI
- If the lines are untimed, start Tap-sync mode and press Enter as each line starts
- Choose your aspect and export — the captions are rendered into the video
Questions people ask about add captions to a video free
Are captions burned in or a separate track?
They are drawn into the picture, so they survive every upload and every platform that strips subtitle tracks.
Which languages can the transcription handle?
Whisper is multilingual and the base model runs locally. Accuracy depends on the recording, and you can edit any line afterwards.
Can I fix a line after transcribing?
Yes. The text stays editable in the panel and any line can be re-tapped.
Is anything uploaded?
No. The audio, the lyrics and the model all stay inside your browser.
Related: lyric video maker free · audiogram maker free · music visualizer for deaf and hard of hearing · how to make a music visualizer