Tool

Lyric Sync Timer: Hold a Key While Each Line Is Sung, Get Start and End Times for a Lyric Video

By Boboy Watson·Built September 5, 2026·Runs in your browser

The short answer

The fastest way to time lyrics for a lyric video is to play the song once and hold a key for each line: press on the first word, release after the last. That gives every line a start and an end in one pass. This tool does that in the browser, lets you fix any line by hand afterwards, and exports the times as timing.txt, LRC, SRT, JSON or CSV for whatever renders the video.

Paste your lyrics, load the song, and hold the space bar (or the button on a phone) while each line is sung. Letting go marks where the line ends, so lines with space between them get a real start and a real finish instead of one guessed tap. Export timing.txt, LRC, SRT, JSON or CSV. Nothing uploads anywhere; the song plays in your browser only.

1 · Lyrics — one line per row, in the order they are sung

0 lines

2 · The song — any audio file on this device

Playback speed 1.00×

Reaction offset (ms)

Slowing the song down makes it easier to catch each line; the times still come out in real seconds. The reaction offset is subtracted from every press and release, because most people land 100–150 ms late on both.

3 · Hold for each line — press on the first word, let go after the last word

0:00.0Load lyrics and a song

Your first line shows here

Keyboard: hold Space while the line is being sung and let go when it ends · Backspace undoes the last line and rewinds three seconds · P pauses. On a phone, press and hold the big button.

Done

Fix any line below without re-recording: edit the start or end, and the export above updates. Click a lyric to hear it from its start.

#	Start (s)	End (s)	Length	Line

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