SubCaptionsAdd subtitles to your YouTube video
You don't need desktop software or YouTube's clunky editor to caption a video. Paste your link, play it here, and type each line as it's spoken. Mark when each caption starts and ends with a keystroke, watch it appear on the video, then download a clean .srt and upload it back in YouTube Studio.
How it works
- Paste your YouTube URL to load the video here.
- Press play. When a line starts, press S; when it ends, press E.
- Type the caption. It appears on the video instantly so timing is never a guess.
- Work through the video, then download your .srt.
- In YouTube Studio, open Subtitles, add a language, and upload the .srt.
Frequently asked questions
Does it transcribe the audio for me?
No. This is a captioning editor, not auto-transcription: you type each line, which means the captions are accurate and read naturally rather than full of speech-recognition errors. The keyboard shortcuts make it fast, and the live preview means you never have to guess the timing.
Will the subtitles stay in sync on YouTube?
Yes. You set each in and out point against the actual video, and the exported .srt carries those exact timecodes, so it lines up when you upload it.
Do I lose my work if I close the tab?
No. Your captions are saved locally in your browser per video, so you can close the tab and pick up where you left off.
Is it really free?
Captioning and exporting are free. Translating your finished captions into other languages is free for normal-size files; Pro covers high volume.