AI auto-captions — free, in your browser
Captions that
place themselves.
Drop in a clip — Trackly reads the voice-over, writes clean subtitles, and lets you drag them exactly where they belong. Export to SRT or VTT. No sign-up, no upload of the full video.
No sign-upRuns in your browserYour video never leaves your device
0:07 / 0:19transcribing
sohere'sthetrick
watchwhathappens
noeditorneeded
SRT
The toolkit
One flagship. Five bonuses.
Trackly is built around Auto Captions — the fastest way to add readable subtitles to a phone-shot clip. Everything else here is a free bonus for when the captions are done.
How it works
From raw clip to captioned in under a minute.
01
Drop your clip
Up to 200 MB, any format. The file stays on your machine — we only ever pull out the audio track.
02
AI reads the voice-over
Gemini transcribes the speech and splits it into short, readable caption lines with precise timestamps.
03
Place & export
Drag a box onto the preview to position the captions, tweak the style, and export SRT or VTT.
FAQ
Good questions, straight answers
You drop in a video (up to 200 MB). Your browser extracts the audio locally with ffmpeg.wasm, so only a small audio file is sent to the API. Gemini transcribes the speech and returns timestamped segments. Then you drag a box onto the preview to place the captions wherever you like.
Your next clip deserves better captions.
No account. No install. Open it and go.